strayer sci115 full course [ all discussions all quizes all assignments and all lab assesments ]

26 Jun strayer sci115 full course [ all discussions all quizes all assignments and all lab assesments ]

Question

“Self-Replication and Cells”

Note: Online students, please respond to one (1) of the following four (4) bulleted options:

Suppose that someone used nanotechnology to build little robots (called “nanobots”) that could make copies of themselves. Discuss whether or not you believe the nanobots would be alive. Explain why or why not?
Go to The Economist website to read the article titled “A Game of Cat and Mouse”, dated June 3, 2010. Discuss what you believe are the main points of the article. Explain how it relates to this week’s lessons. Give examples with your response.
A person is declared to be dead upon the irreversible cessation of spontaneous body functions: brain activity, or blood circulation and respiration. However, only about 1% of a person’s cells have to die in order for all of these things to happen. Explain how a person can be dead when 99% of his or her cells are still alive, and provide examples with your explanation.
In 2005, researcher Woo-suk Hwang reported that he had made immortal stem cells from human patients. His research was hailed as a breakthrough for people affected by degenerative diseases, because stem cells may be used to repair a person’s own damaged tissues. Hwang published his results in a peer-reviewed journal. In 2006, the journal retracted his paper after other scientists discovered that Hwang’s group had faked the data. Discuss the implications of the incident. In your brief discussion, determine if the incident shows that results of scientific studies cannot be trusted or if it confirms the usefulness of a scientific approach, because other scientists discovered and exposed the fraud.

week 2

“Molecules and Cell Structures”

Note: Online students, please respond to one (1) of the four (4) bulleted options.

In an essay of the universal nature of biochemistry, located at http://www.pnas.org/content/98/3/805.full), Norman Pace argues that carbon is the only chemical element that can form the backbones of molecules that make up living things. Determine what Pace’s argument is and explain why he believes this.
The bonding properties of water give it certain characteristics: surface tension, capillary action, universal solvent, high specific heat, and a high heat of vaporization. Indicate three reasons why you believe these properties are important to organisms that live underwater. In your own words, explain one of the following everyday phenomena in regard to the bonding properties of water, and propose one other everyday phenomenon that demonstrates the bonding properties of water:
Why do you feel cool when you sweat?
Why do paper towels (made of cellulose, another polar molecule) absorb water?
How can a water strider walk on water?
A group working at the University of California, Berkeley has developed “nanothermometers,” little nanoparticles that can be injected into cells to measure the temperature in various places in the cell. So far, they have been used in cells growing in a culture dish. Indicate what you think the group will discover about the temperature in different parts of the cell. Discuss whether you believe it will be the same or different, and explain why.
The 1992 movie Lorenzo’s Oil recounts the story of six-year-old Lorenzo Odone and his battle with adrenoleukodystrophy (ALD), which is caused by a malfunctioning organelle called a peroxisome. A peroxisome is an organelle that ordinarily contains enzymes capable of breaking down long-chain fatty acids. In ALD, the enzyme is missing, and when long-chain fatty acids accumulate, muscle weakness, and loss of control result. Select the organelle in the cell that is the most similar in structure and function to a peroxisome, and explain why you chose that organelle. Describe the function and structure of the organelle that you chose. Give examples of how a dietician might be able to help a person with ALD.

week 3

“Energy for Life and Energy Reactions and Processes”

Note: Online students, please respond to one (1) of the following four (4) bulleted items.

The breakdown of ATP releases energy, which is utilized by other reactions that require energy. Identify other examples where inventions have utilized a similar principle, where energy released during one reaction is utilized elsewhere. List three reasons why either one of the processes is more efficient than the other.
Go to one (1) of the Websites listed below to read the blog post of your choice. Discuss the main points of the blog post you chose to read. Explain how it relates to this week’s lessons. Give examples with your response.
– “How Exercise Can Strengthen the Brain”

– “Can Exercise Keep You Young?”

Go to the Dive Discover Website and review the Web page titled “Vent Biology: Introduction to Photosynthesis vs. Chemosynthesis”. Analyze the major similarities and differences between chemosynthesis and photosynthesis. Determine what you believe is the most significant step in regard to harnessing energy within each process, and explain why.
Go to The Guardian’s Website to read the article titled “GM microbe breakthrough paves way for large-scale seaweed farming for biofuels”, dated January 19, 2012. Discuss the main point of the article. Determine at least three (3) benefits of the genetically modified organism(s) described in the article. Give your opinion about what risks the genetically modified organisms pose to society, and explain how non-scientist citizens can arrive at an informed opinion in such matters.

week 4

“Bird Flu Research, DNA, and RNA” Please respond to the following:

Note: Online students, please respond to one (1) of the following three (3) bulleted items.

Go to one (1) of the Websites listed below to read the article of your choice. Examine the benefits and risks this research poses to society. Indicate if you believe there are more benefits or more risks associated with this research, and give a rationale with your response.
– “Controversial H5N1 bird flu papers published, fuels fears of airborne mutations”

– “The evolution of bird flu and the race to keep up”

Examine the differences between DNA and RNA. Explain the main reasons DNA is the most favorable molecule for genetic material and how RNA compares to it in this respect.
Mutations are the original source of genetic variation. Explain how mutations can accumulate in DNA, given that cells have repair systems that fix

week 5\
“Cells and Cancer and Sexual Reproduction” Please respond to the following:

Note: Online students, please respond to one (1) of the following four (4) bulleted items.

Go to the Science Blogs Website and read the blog post titled “Dichloroacetate and cancer”. Explain how the blog post ties in with this week’s lessons. Indicate three (3) significant ways this post tells us about the link between metabolism, apoptosis, and cancer, and provide an example with your response.
Go to the Postcards from Winticomack Website and read the blog post titled, “Using genetically-modified bacteria to fight cancer at Johns Hopkins”. Discuss the main point of the article. Determine at least three (3) benefits of the genetically modified bacteria described in the article. Give your opinion on what risks the genetically modified bacteria may pose to those receiving the cancer treatments.
Describe the major differences between Meiosis I and Meiosis II. Explain what you believe is the most significant difference in respect to sexual reproduction, and explain why.
Discuss the advantages of sexual reproduction in plants over asexual reproduction. Determine if there are any disadvantages, and explain why or why not.

week 6

“Inheritance and Genetic Engineering” Please respond to the following:

Note: Online students, please respond to one (1) of the following four (4) bulleted items.

Compare and contrast the Mendelian and non-Mendelian patterns of inheritance. Describe what you believe is the most significant difference, and explain why.
In 1918, an influenza pandemic that originated with avian flu killed 50 million people. Researchers isolated samples of that virus from bodies of infected people preserved in Alaskan permafrost since 1918. From the samples, they sequenced the viral genome, and then reconstructed the virus. The reconstructed virus is 39,000 times more infectious than modern influenza strains, and 100 percent lethal in mice. Understanding how this virus works can help us defend ourselves against other deadly influenza strains that arise. For example, discovering what makes it so infectious would help researchers design more effective vaccines. Consider this statement: Critics of the research are concerned that if the virus escapes the containment facilities (even though it has not done so yet), it might cause another pandemic. Worse, terrorists could use the published DNA sequence and methods to make the virus for horrific purposes. Determine whether or not you believe this research makes us more or less safe, and explain why. Propose at least one (1) other application these discoveries could be used for.
Go to one (1) of the Websites below to read the article of your choice. Discuss the main point of the article you chose to read. Determine at least three (3) benefits of the genetically modified organism(s) described in the article. Give your opinion about what risks the genetically modified organisms pose to society, and justify how non-scientist citizens can arrive at an informed opinion in such matters.
-“Synthetic Life: the Revolution Begins”

-“Engineering Food for All”

Go to The New York Times Website to read the article titled “Concerns are raised about genetically-engineered mosquitos”, dated October 30. In your own words, summarize the pros and cons of using genetically engineered insects to control pests. Determine if you would be for or against the use of genetically engineered insects in your neighborhood, and explain why.

week 9

“Evolution in Animals and Population of Humans” Please respond to the following:

Note: Online students, please respond to one (1) of the following four (4) bulleted items.

Humans belong to the genus Homo and chimpanzees to the genus Pan, yet studies of primate genes show that chimpanzees and humans are more closely related to one another than each is to any other animals. In light of this result, some researchers suggest that chimpanzees should be renamed as members of the genus Homo. Discuss at least three (3) practical, scientific, and / or ethical issues that might be raised by such a change in naming.
Consider the animals in this week’s readings that are radially symmetrical (cnidarians, many adult echinoderms). Choose one (1) animal that is radially symmetrical and discuss how its lifestyle is different from that of bilaterally symmetrical animals. Illustrate how its body plan complements its lifestyle.
The age structure diagrams for two (2) hypothetical human populations are shown on Page 331 of the textbook. Describe the growth rate of each population, and discuss at least two (2) current and future social and economic problems that each is likely to face.
Species that are more prone to certain risk factors are more likely than others to become extinct. For example, species with a unique lineage, such as the giant panda, are likely to be at severe risk for extinction. Some argue that high-risk species are less successful products of evolution and should not receive extraordinary protection. Consequently, all species at risk for extinction should be equally protected. Determine whether or not you believe our limited resources for species protection should be focused on species that are at the highest risk for extinction, and explain why.

week 7

“Effective Evolution and Processes Affecting Evolution” Please respond to the following:

Note: Online students, please respond to one (1) of the following four (4) bulleted items.

The human appendix, a vestigal extension off the large intestine, is homologous to a structure called a caecum, generally larger than our appendix, and houses bacteria that aid in digesting cellulose, the main component of plants. Explain how the presence of the appendix might be used to show our common ancestry with other mammals, and determine what it might tell us about the dietary history of humans. Provide an example with your response.
Geneticists compare DNA base sequences among organisms and from this data determine a gene’s rate of evolution. Different genes have been found to evolve at different rates. Explain why some genes might have faster rates of evolution than other genes as populations adapt to their environments, and give an example with your explanation.
Go to The Economist Website to read the article titled “Subtle poison”, dated March 31, 2012. Explain the main point of the article and how it relates to this week’s lessons. Discuss the effect pesticides and other man-made chemicals could potentially have on the process of evolution, and give examples with your response.
Species have been traditionally characterized as “primitive” and “advanced.” For example, mosses were considered to be primitive, and flowering plants advanced; crocodiles were primitive and mammals were advanced. Most biologists of today think it is incorrect to characterize any modern species as primitive. Determine whether or not you believe it is incorrect to refer to any modern species as primitive, and explain why.
week 8

“Evolution of Disease and Plant Evolution” Please respond to the following:

Note: Online students, please respond to one (1) of the following four (4) bulleted items.

Go to The New York Times Website to read the article titled “10 genes, furiously evolving”, dated May 4, 2009. Summarize the main points of the article. Determine what you believe is the most significant piece of information discussed in this article that helps scientists understand the evolution of viruses, and explain why.
A subset of what are called “Neglected Tropical Diseases” (NTDs) is caused by parasitic worms. Use the Internet or the Strayer Library to research one (1) NTD that results from a parasitic worm. Describe the NTD you researched and the organism that causes it. Explain how the NTD you researched relates to this lesson. Provide a rationale with your response. (In your discussion, provide the URL for the article.)
Several algae blooms have been in the news recently. Use the Internet or the Strayer Library to find one (1) article about an algae bloom. Summarize the main points of the article you found. Explain how this article relates to this week’s lesson, and give three (3) examples with your response. (In your discussion, provide the URL for the article.)
Use the Internet or the Strayer Library to find one (1) resource that provides an illustration, animation, or simulation about the alternation of generations in plants. Describe the resource you found, and conclude whether or not it helps you to understand the alternation of generations in plants. Determine how you would rate the resource from a scale of 1-5, with 1 being the worst and 5 being the best, in helping you understand alteration of generations in plants. Explain why you chose this rating. (In your discussion, provide the URL for the resource.)

week 10

“Effects on the Environment” Please respond to the following:

Note: Online students, please respond to one (1) of the following four (4) bulleted items.

Prior to the arrival of Europeans, the common nightcrawler, an annelid worm, was absent from much of the North American continent. Apparently, it had been wiped out by the glaciers of the last Ice Age. Use the Internet or the Strayer Library to research how the introduction of earthworms to North America occurred in the so-called “Columbian Exchange.” Discuss your findings. Based on what you researched, give your opinion about how it affected the environment.
With antibiotic resistance rising, researchers are looking for ways to reduce use of these drugs. Some cattle once fed antibiotic-laced food now get feed that includes helpful bacteria that can live in the animal’s gut. The idea is that if a large population of beneficial bacteria is in place, then harmful bacteria with the same resource needs are less likely to thrive. Explain why this idea makes sense in terms of species interactions and provide an example with your response.
Analyze the impact that the extinction of a species will have on an environment. Determine what you believe to be the most significant impact, and explain why.
Go to The New York Times Website to read the article titled “Taking advantage of a destructive insect’s weakness for purple”, dated September 12, 2011. Describe how the collection of knowledge about the Ash borer’s ecology and behavior are helping to control infestations of this non-native species. All of these efforts cost money. As a citizen, determine whether or not you believe that the time and effort spent collecting this information is worth it, and explain why.

Students, please view the “Submit a Clickable Rubric Assignment” in the Student Center.
Instructors, training on how to grade is within the Instructor Center.

Assignment 1: Biology Article

Due Week 5 and worth 120 points

Use the Internet and / or the Strayer Learning Resource Center to research aspects of biology.

Select an article from a magazine or newspaper that has something in it that pertains to biology. This will serve as the “target article” for this assignment. For instance, you can select an article about medicine, invasive species, nature, conservation, genetic technology, ecology, or any other topic that is related to biology. One purpose of this assignment is to help you become aware of how biology is related to your everyday life.

Write a one to three (1-3) page paper in which you:

Summarize the article in one (1) or more paragraphs, using your own words.Be sure to identify the article using an in-text citation in the body of the paper, as well as a reference in the reference section.
Explain how the article relates to this course. Identify which biological concepts from the course and / or text are relevant to the topic covered in the article. Citing the course text, discuss the ways in which this course does (or doesn’t) provide background information to help you understand the article and the larger issues surrounding it.
Explain why the article caught your attention. Relate the article to your life and to issues that are important to you. Discuss how or if the scientific knowledge about the topic covered in the article affects you directly or indirectly.
Discuss your opinion on how research on this topic should be funded. State whether you think taxpayer monies should support research on this topic or whether such research in this area should be funded by the private sector. Rate the importance of research on this topic, relative to other areas of research.
In addition to the target article, you should use at least one additional resource, such as your textbook or another article. You must have a reference section which contains an APA reference to your chosen article and all other sources. Additionally, you must provide in-text citations (in APA format) to your references in the body of the text. Integrate all sources into your paper using proper techniques of quoting, paraphrasing and summarizing, along with your in-text citations.

Your assignment must follow these formatting requirements:

Be typed, double spaced, using Times New Roman font (size 12), with one-inch margins on all sides; citations and references must follow APA or school-specific format. Check with your professor for any additional instructions.
Include a cover page containing the title of the assignment, the student’s name, the professor’s name, the course title, and the date. The cover page and the reference page are not included in the required assignment page length.
The specific course learning outcomes associated with this assignment are:

Use technology and information resources to research issues in biology.
Write clearly and concisely about biology using proper writing mechanics.
Grading for this assignment will be based on answer quality, logic / organization of the paper, and language and writing skills.

Click here to view the grading rubric.

Assignment 2: Gene Technology
Due Week 8 and worth 120 points
Gene technology carries with it social and ethical implications—many of which engender personal views and discussion.

Select one (1) of the following biotechnology topics to write about:

Genetically modified crop plants
Genetically modified microorganisms
Genetically modified animals
Personal genomics and / or personalized medicine for humans
Gene therapy
Write a four to six (4 to 6) page paper on your chosen topic. Organize your paper into sections corresponding to the following requirements:

Biological basis. Describe the technology. Discuss what it accomplishes. Elaborate on the scientific principles that make this technology possible. Your goal in this section of the paper is to show the instructor that you understand the underlying science behind the technology. Describe how exactly the technology works. Discuss the biological principles that underlie this technology.
Social and ethical implications. Without disclosing your personal view about this technology, provide an analysis of its social and ethical implications. State the ethical concerns apparent in the use of this technology. Discuss the benefits and risks. Your goal in this section is to look at all sides of the issue. In the next section, you will give your opinion.
Personal viewpoint. In the previous section, your goal was to be as objective as possible, to look at all sides of the issues. In this section, your goals are to give a personal opinion about the technology and provide a justification of that opinion.
Use at least three (3) quality resources in this assignment, in addition to the course text. Note: Wikipedia and similar Websites do not qualify as quality resources. The body of the paper must have in-text citations that correspond to the references. Integrate all sources into your paper using proper techniques of quoting, paraphrasing and summarizing, along with proper use of in-text citations to credit your sources.
Your assignment must follow these formatting requirements:

Be typed, double spaced, using Times New Roman font (size 12), with one-inch margins on all sides; citations and references must follow APA or school-specific format. Check with your professor for any additional instructions.
Include a cover page containing the title of the assignment, the student’s name, the professor’s name, the course title, and the date. The cover page and the reference page are not included in the required assignment page length.
The specific course learning outcomes associated with this assignment are:

Examine DNA structure, and function, gene expression, and control.
Discuss the various applications of genomics and biotechnology.
Use technology and information resources to research issues in biology.
Write clearly and concisely about biology using proper writing mechanics.
Click here to view the grading rubric.

quizes

quiz 1 and 2

Question 1

3 out of 3 points

Correct

Which of the following represents the most correct order of the organization of life from the smallest unit to the largest?

Question 2

0 out of 3 points

Incorrect

Which of the following is a basic component of all of the others?

Question 3

3 out of 3 points

Correct

Energy flow through an ecosystem is one-way because

Question 4

3 out of 3 points

Correct

Which of the following organisms is a multi-celled producer?

Question 5

3 out of 3 points

Correct

Plants perform photosynthesis by using the energy of ____ to power production of sugars from ____ and ____ molecules.

Question 6

3 out of 3 points

Correct

In the scientific name, Pan paniscus, Pan represents the name of the ____ while paniscus represents the name of the ____.

Question 7

3 out of 3 points

Correct

Modern taxonomists today tend to group organisms into the same category based on

Question 8

0 out of 3 points

Incorrect

Which of the following words describes a tentative explanation to a given question?

Question 9

3 out of 3 points

Correct

A result is statistically significant if

Question 10

3 out of 3 points

Correct

A control group

Quiz 2

Question 1

2.5 out of 2.5 points

Correct

The neutral subatomic particle is

Question 2

2.5 out of 2.5 points

Correct

An atom that carries a charge is called a(n)

Question 3

0 out of 2.5 points

Incorrect

A hydrogen bond is

Question 4

2.5 out of 2.5 points

Correct

Hydrophobic molecules are ____ water.

Question 5

2.5 out of 2.5 points

Correct

Which of the following is true of water molecules when water becomes ice?

Question 6

2.5 out of 2.5 points

Correct

What part does carbon play in the structure of biological molecules?

Question 7

2.5 out of 2.5 points

Correct

Elephants are large animals because they

Question 8

2.5 out of 2.5 points

Correct

Plasma membrane proteins might be involved in

Question 9

0 out of 2.5 points

Incorrect

Eukaryotic cells have their DNA enclosed in the

Question 10

2.5 out of 2.5 points

Correct

If you could stick a microscopic pin into the center of a bacterium, what would the order of the structures you would encounter from the outside in?

Question 11

0 out of 2.5 points

Incorrect

Which of the following is NOT a characteristic of mitochondria?

Question 12

0 out of 2.5 points

Incorrect

Which organelle makes

Question 1

2.5 out of 2.5 points

Correct

Two researchers suggested in the 1960s that ____ may have been the first informational molecule.

:

RNA

Question 2

2.5 out of 2.5 points

Correct

Which of the following components was NOT a significant part of the earth’s early atmosphere?

Question 3

2.5 out of 2.5 points

Correct

You boil water that has been extracted from a swamp and find there are archaea that are still alive. These archaea are most likely

Question 4

2.5 out of 2.5 points

Correct

Which of the following do anaerobic methanogens produce?

Question 5

2.5 out of 2.5 points

Correct

The first eukaryotic cells were

Question 6

2.5 out of 2.5 points

Correct

Plasmodium is

Question 7

2.5 out of 2.5 points

Correct

Which of the following is TRUE about the spores of seed plants?

Question 8

2.5 out of 2.5 points

Correct

Microspores mature into

Question 9

2.5 out of 2.5 points

Correct

Which of the following structures in the life cycle of a plant are diploid?

Question 10

2.5 out of 2.5 points

Correct

Angiosperms

Question 11

2.5 out of 2.5 points

Correct

Which of the following characteristics is common to bryophytes and to seedless vascular plants?

Question 12

2.5 out of 2.5 points

Correct

All fungi are

heterotrophic.

quiz 3 and 4

• Question 1

2.5 out of 2.5 points

The second law of thermodynamics holds that

• Question 2

2.5 out of 2.5 points

The minimum amount of energy needed to get a chemical reaction started is called the ___ energy.

• Question 3

2.5 out of 2.5 points

A substrate is another term for a(an)

• Question 4

0 out of 2.5 points

When there is a “concentration gradient” this means that

• Question 5

2.5 out of 2.5 points

Oxygen, carbon dioxide, as well as other small molecules, cross the plasma membrane through the process of

• Question 6

2.5 out of 2.5 points

Osmosis involves

• Question 7

2.5 out of 2.5 points

The sodium-potassium pump is an example of

• Question 8

2.5 out of 2.5 points

The ultimate energy source for food production for most life on earth is

• Question 9

2.5 out of 2.5 points

In which of the following cellular organelles does photosynthesis take place?

• Question 10

2.5 out of 2.5 points

Of the following, which event occurs first in the light-dependent reactions of photosynthesis?

• Question 11

2.5 out of 2.5 points

In lactate fermentation, _____ is converted into lactate.

• Question 12

2.5 out of 2.5 points

In what part of aerobic respiration, is carbon dioxide released?

Quiz 4

• Question 1

0 out of 2.5 points

The connection point of two sister chromatids is called the

• Question 2

2.5 out of 2.5 points

A eukaryotic chromosome consists of

• Question 3

2.5 out of 2.5 points

If one strand of a DNA molecule read ACCTTGAC, what would the other side read?

• Question 4

2.5 out of 2.5 points

Which of the following is the correct complementary bonding of nitrogen containing bases in DNA?

• Question 5

2.5 out of 2.5 points

If a DNA molecule was a spiral staircase, what would the steps of the staircase be?

• Question 6

2.5 out of 2.5 points

Somatic cell nuclear transplant

• Question 7

2.5 out of 2.5 points

DNA molecules contain protein coding sequences called

• Question 8

2.5 out of 2.5 points

In a eukarytote, transcription takes place in the

• Question 9

2.5 out of 2.5 points

Transcription starts at a region of DNA called a(n)

• Question 10

2.5 out of 2.5 points

tRNA differs from other types of RNA because it

• Question 11

2.5 out of 2.5 points

____ molecules carry amino acids to ribosomes.

• Question 12

2.5 out of 2.5 points

In multicellular organisms, specialization in structure and function of cells is caused by

quiz 5 and 6

• Question 1
3 out of 3 points

Asexual reproduction

• Question 2

3 out of 3 points

Researchers use HeLa cells to

• Question 3

3 out of 3 points

In what phase of the cell cycle does a typical cell spend most of its life?

• Question 4

3 out of 3 points

The event directly before the beginning of DNA replication is

• Question 5

3 out of 3 points

Sister chromatids detach from one another and become visibly separate chromosomes during

• Question 6

0 out of 3 points

In which phase of mitosis do chromosomes arrive at opposite sides of the cell?

• Question 7

3 out of 3 points

Abnormal cell division that does not pose a threat to surrounding tissues are termed

• Question 8

3 out of 3 points

An accumulation of cells that divide uncontrollably is known as

• Question 9

3 out of 3 points

Sister chromatids are separated from each other during ____ of meiosis.

• Question 10

3 out of 3 points

Meiosis is the basis for

Quiz 6

• Question 1

· 2.5 out of 2.5 points

Cystic fibrosis is a recessive disorder. If a couple, each of whom is heterozygous, have children, what is the probability that they will have a child with cystic fibrosis?

• Question 2

2.5 out of 2.5 points

If a homozygous dominant long-haired dog is crossed with a homozygous recessive short-haired dog, what will be the phenotype of the offspring?

• Question 3

2.5 out of 2.5 points

Observable traits are known in genetics as

• Question 4

2.5 out of 2.5 points

In humans, skin color is controlled by several genes. Thus, skin color is a(n) ____ characteristic.

• Question 5

2.5 out of 2.5 points

If a daughter expresses an X-linked recessive gene, she inherited the trait from

• Question 6

0 out of 2.5 points

Nondisjunction during meiosis can result in:

• Question 7

0 out of 2.5 points

______________ enzymes are able to cut DNA molecules at specific sequences?

• Question 8

2.5 out of 2.5 points

If the nucleotide sequence, ACTGAG, represents the sticky end of a DNA molecule, to what other nucleotide sequence would it “stick”?

• Question 9

2.5 out of 2.5 points

Which of the following diseases has gene therapy been successful in curing?

• Question 10

2.5 out of 2.5 points

In agriculture, the use of GMOs is regulated by

• Question 11

2.5 out of 2.5 points

What is a SNP?

• Question 12

2.5 out of 2.5 points

Which of the following describes most accurately the expression “recombinant DNA”?

\

quiz 7

• Question 1

2.5 out of 2.5 points

What idea did Malthus champion that Darwin incorporated into his theory of evolution?

.

• Question 2

2.5 out of 2.5 points

What is the age of the oldest known terrestrial rock?

• Question 3

2.5 out of 2.5 points

Which of the following factors is the only one that influences radioactive decay?

• Question 4

2.5 out of 2.5 points

The theory of continental movement is called

• Question 5

2.5 out of 2.5 points

What is true about homologous structures?

• Question 6

2.5 out of 2.5 points

Similar structures that have evolved independently in different lineages that do not share common ancestry are called

• Question 7

2.5 out of 2.5 points

Any change in allele frequencies in a gene pool is

• Question 8

2.5 out of 2.5 points

The original source of new alleles is

• Question 9

2.5 out of 2.5 points

With ____ selection(s), the forms of a trait at both extremes of a range of variation are favored.

• Question 10

2.5 out of 2.5 points

Individuals who are heterozygous for sickle-cell anemia have a greater resistance to

• Question 11

2.5 out of 2.5 points

When individuals choose mates with a particular trait they desire it is called

• Question 12

2.5 out of 2.5 points

A physical barrier that separates a population in half and that leads to the evolution of a new species is called

cell chemistry lab

• Question 1

15 out of 15 points

Match the following:

Answer

Question Correct Match Selected Match

Biuret

Iodine potassium iodide

Nile blue

Ninhydrin

Orcinol

• Question 2

3 out of 3 points

What color develops when orcinol reacts with sugars in a sample?

Answer

• Question 3

3 out of 3 points

What color develops when Nile blue reacts with lipids in a sample?

• Question 4

3 out of 3 points

As the concentration of a specific biochemical in a sample increases, the intensity measurement from the spectrophotometer for that biochemical decreases.

• Question 5

3 out of 3 points

How many different biochemicals were detected in samples from potatoes?

• Question 6

3 out of 3 points

The biochemical profiles of the stomach contents of herbivores, omnivores and carnivores are qualitatively and quantitatively different.

strayer sci115 Cell Division Lab Assessment

3 out of 3 points

Correct

In general, neurons are locked into G1.

Question 2

3 out of 3 points

Correct

During which phase of the cell cycle are chromosomes being copied?

Question 3

3 out of 3 points

Correct

During which phase of the cell cycle is the nucleus actually dividing?

Question 4

3 out of 3 points

Correct

What is the diploid number of chromosomes in the cells shown in the animation of mitosis?

Question 5

3 out of 3 points

Correct

Chromatin is a feature of a nucleus in the stage of

Question 6

3 out of 3 points

Correct

How many cells are produced from a single cell after five mitotic divisions?

Question 7

3 out of 3 points

Correct

Crossing over occurs during _________ _

Question 8

3 out of 3 points

Correct

Homologous chromosomes pair during

Question 9

3 out of 3 points

Correct

Meiosis produces ______ haploid nuclei.

Question 10

3 out of 3 points

Correct

Meiosis reduces the number of chromosomes to one-___ of the original

number.

strayer sci115 Molecular Biology Lab Assessment

Question 1

3 out of 3 points

Correct

Consider the pedigree analysis of sickle-cell disorder. Do both males and females appear to have the disease?

Question 2

3 out of 3 points

Correct

Consider the pedigree analysis of sickle-cell disorder. Do any of the offspring or parents have sickle-cell anemia?

Question 3

3 out of 3 points

Correct

Consider the pedigree analysis of sickle-cell disorder. Is it possible to be a “carrier” (phenotypically normal but capable of passing the allele to one’s offspring) for sickle-cell anemia?

Question 4

3 out of 3 points

Correct

In looking at sickle-cell anemia, we are interested in studying the gene that codes for

Question 5

3 out of 3 points

Correct

The purpose of PCR is to

Question 6

3 out of 3 points

Correct

To create cDNA from extracted mRNA requires the use of

Question 7

3 out of 3 points

Correct

How many markers are currently used in the CODIS system in creating a DNA fingerprint?

Question 8

0 out of 3 points

Incorrect

In DNA fingerprinting, a specific marker with a single peak indicates that the individual is ___________ with respect to that particular STR marker

Question 9

3 out of 3 points

Correct

All of the specific STRs that the FBI looks at in its CODIS forensic DNA system are:

Question 10

3 out of 3 points

Correct

In DNA fingerprinting, the probability of a match being due to chance diminishes as the number of markers used

strayer sci115 Cell Structure Lab Assessment [ three sets ]

• Question 1

3 out of 3 points

Prokaryotic cell walls are constructed out of _____ _.

• Question 2

3 out of 3 points

Which structure is found only in animal cells?

• Question 3

3 out of 3 points

The cell walls of plant cells and prokaryotic cells are structurally identical.

• Question 4

3 out of 3 points

Cytoplasmic DNA is a feature of _______ cells.

• Question 5

3 out of 3 points

What is the rough ER’s function in the cell?

• Question 6

3 out of 3 points

What is the cell wall’s function in the cell?

• Question 7

3 out of 3 points

What is the function of the nucleolus in the cell?

• Question 8

3 out of 3 points

What is the mitochondrion’s function in the cell?

• Question 9

3 out of 3 points

What is the Golgi body’s function in the cell?

• Question 10

3 out of 3 points

What cellular functions do the membrane macromolecules serve?

• Question 1

0 out of 3 points

Photosynthesis is conducted in the ____ _.

• Question 2

3 out of 3 points

If a cell has a large quantity of rough ER, what does this suggest about the

activity of that cell?

• Question 3

0 out of 3 points

All cells possess a ______.

• Question 4

0 out of 3 points

The cell walls of plant cells and prokaryotic cells are structurally identical.

• Question 5

3 out of 3 points

What is the function of the nucleolus in the cell?

• Question 6

3 out of 3 points

The nuclear envelope is perforated by _________ _.

• Question 7

3 out of 3 points

What is the Golgi body’s function in the cell?

• Question 8

3 out of 3 points

What is the cell wall’s function in the cell?

• Question 9

3 out of 3 points

What is the mitochondrion’s function in the cell?

• Question 10

0 out of 3 points

What is the chloroplasts’ function in the cell?

• Question 1

0 out of 3 points

Cytoplasmic DNA is a feature of _______ cells.

• Question 2

0 out of 3 points

All cells possess a ______.

• Question 3

3 out of 3 points

Which structure is found only in animal cells?

• Question 4

3 out of 3 points

Prokaryotic cell walls are constructed out of _____ _.

• Question 5

3 out of 3 points

What is the mitochondrion’s function in the cell?

• Question 6

0 out of 3 points

What property describes the plasma membrane’s ability to regulate the

movement of molecules into and out of the cell?

• Question 7

3 out of 3 points

What is the function of the nucleolus in the cell?

• Question 8

3 out of 3 points

What is the rough ER’s function in the cell?

• Question 9

3 out of 3 points

What is the chloroplasts’ function in the cell?

• Question 10

3 out of 3 points

What is the cell wall’s function in the cell?

strayer sci115 Genetics Lab Assessment

Question 1

3 out of 3 points

Correct

In the first part of this lab, we study data from a (hypothetical) species called Glyptodan neomexicanus. Each individual has either a red shell or a yellow shell. A count of individuals in a particular area indicates that there are 122 red individuals and 38 yellow individuals. If we assume that shell color is inherited in a Mendelian fashion, which shell color appears to be dominant?

Question 2

3 out of 3 points

Correct

All we can observe directly is the phenotype of an individual, without biochemical or genomic analysis. Therefore, we cannot ascertain the genotype of individuals by inspection of their shells. However, if shell color is inherited in a Mendelian fashion and if we study family units, we can infer the genotype from the phenotypes of the parents and the offspring. In this analysis we are assuming that red is dominant and yellow is recessive. The A allele goes with the red trait, the a allele goes with the yellow trait.

If one parent is red and the other is yellow and half the offspring are red, while half the offspring are yellow, then

Question 3

3 out of 3 points

Correct

All we can observe directly is the phenotype of an individual, without biochemical or genomic analysis. Therefore, we cannot ascertain the genotype of individuals by inspection of their shells. However, if shell color is inherited in a Mendelian fashion and if we study family units, we can infer the genotype from the phenotypes of the parents and the offspring. In this analysis we are assuming that red is dominant and yellow is recessive. The A allele goes with the red trait, the a allele goes with the yellow trait.

If both parents are red, and there are three red offspring and one yellow offspring, we know that:

Question 4

3 out of 3 points

Correct

Refer to the picture of the thin-layer chromatography results to answer this question. Is the grey pigment controlled by the same gene as the red pigment?

No

Question 5

3 out of 3 points

Correct

Refer to the picture of the thin-layer chromatography results to answer this question Which pigment is always present when a dominant allele ( A) is present?

Question 6

3 out of 3 points

Correct

Refer to the picture of the thin-layer chromatography results to answer this question Can you distinguish between the chromatograms of an Aa individual and an AA individual?

Question 7

3 out of 3 points

Correct

Electrophoresis Demo

How many proteins appear to be related to the differences in shell color?

Question 8

3 out of 3 points

Correct

Electrophoresis Demo

Since genes are expressed by coding for the production of individual proteins, do any proteins found appear to be under the control of any particular allele(s)?

Question 9

3 out of 3 points

Correct

Electrophoresis Demo

Does the presence or absence of a particular protein correlate with the presence or absence of a particular allele?

Question 10

3 out of 3 points

Correct

Electrophoresis Demo

What is the approximate molecular weight of the protein that is missing from the homozygous recessive extract?

strayer sci115 Photosynthesis Lab Assessment

• Question 1

3 out of 3 points

At the start of the algal filament experiments, the bacteria were evenly distributed throughout the chamber. Subsequently, after the chamber was flooded with white light, the bacteria were

• Question 2

3 out of 3 points

Given that the atmospheric concentration of CO 2 is approximately 300 ppm,

is photosynthesis in the field limited by the concentration of CO 2?

• Question 3

3 out of 3 points

Is photosynthetic 0 2 production light-dependent?

• Question 4

3 out of 3 points

In the algal filament experiment, after the algal filament was illuminated with light from the prism, the bacteria were clumped along certain areas of the algal filament.Which wavelengths of white light seem most photosynthetically effective?

• Question 5

3 out of 3 points

In thin-layer chromatography, Rf refers to the

• Question 6

3 out of 3 points

What rate comes closest to the maximum rate of carbon dioxide fixation you

have measured in this activity?

• Question 7

3 out of 3 points

Does the rate of photosynthesis increase with increasing light intensity?

• Question 8

3 out of 3 points

Does increasing the concentration of CO 2 increase the rate of

photosynthesis?

• Question 9

0 out of 3 points

At the start of the algal filament experiments, the bacteria were evenly distributed throughout the chamber. Subsequently, after the chamber was left in the dark for two minutes, the bacteria were

• Question 10

3 out of 3 points

In the experiment using thin-layer chromatography, pigments in a leaf are separated. The spots on the chromatography plate are then compared to known standards on the basis of

• Question 1

0 out of 3 points

Given that the atmospheric concentration of CO 2 is approximately 300 ppm,

is photosynthesis in the field limited by the concentration of CO 2?

Answer

Selected Answer:

No

Correct Answer:

Yes

• Question 2

3 out of 3 points

In the experiment using thin-layer chromatography, pigments in a leaf are separated. The spots on the chromatography plate are then compared to known standards on the basis of

• Question 3

0 out of 3 points

What rate comes closest to the maximum rate of carbon dioxide fixation you

have measured in this activity?

Answer

Selected Answer:

220 microliters/min

Correct Answer:

110 microliters/min

• Question 4

0 out of 3 points

Does the rate of photosynthesis increase with increasing light intensity?

• Question 5

3 out of 3 points

At the start of the algal filament experiments, the bacteria were evenly distributed throughout the chamber. Subsequently, after the chamber was flooded with white light, the bacteria were

• Question 6

3 out of 3 points

Does increasing the concentration of CO 2 increase the rate of

photosynthesis?

• Question 7

0 out of 3 points

In the algal filament experiment, after the algal filament was illuminated with light from the prism, the bacteria were clumped along certain areas of the algal filament.Which wavelengths of white light seem most photosynthetically effective?

• Question 8

0 out of 3 points

In thin-layer chromatography, Rf refers to the

• Question 9

0 out of 3 points

At the start of the algal filament experiments, the bacteria were evenly distributed throughout the chamber. Subsequently, after the chamber was left in the dark for two minutes, the bacteria were

• Question 10

3 out of 3 points

Is photosynthetic 0 2 production light-dependent?