26 Jun strayer sci115 week 2,3 and 4 discussions latest 2015 november
Question
“Mitochondria, Water, Molecules, and Cell Structures”
Note: Online students, please respond to one (1) of the following four (4) bulleted options.
The cell is comprised of very important components including the mitochondria. Please view this video describing mitochondrial disease which is found here. Keep in mind that one of the symptoms of mitochondrial disease is fatigue (weak and tired). Next discuss two (2) functions of mitochondria and why you believe each of these functions is important. Then explain two (2) ways that the inability of mitochondria to perform their proper function can account for mitochondrial disease symptoms. Justify your response.
Water is essential to life. Briefly discuss three (3) properties of water then explain what is meant by the structure of water accounting for each of its properties. Next choose one (1) of the properties of water below and explain two (2) ways the property can be useful for living systems.
Cohesion
Adhesion
High Specific Heat
Floating Ice
Good Solvent Properties
Dissociation of water molecules
Are you really what you eat? Many of us have heard the saying, “you are what you eat”. Please view the quick crash course on carbohydrates, lipids, and proteins here then describe the processes needed to distinguish whether a biological molecule is a carbohydrate, lipid, or protein. Next consider your daily intake of foods this week and note the various carbohydrates, lipids, and proteins you ingested. Discuss three (3) ways that your diet relates to the molecules of life and their function. Justify your response.
Consider three (3) structures and functions of a cell then provide a 100 to 250 word explanation based on the following question: “How do varied membrane composition and the structural features of molecules in different cells contribute to membrane function?”
week 3
“Energy Sources and Energy for Life”
Note:Online students, please respond to one (1)of the following three (3) bulleted items.
Discuss three (3) types of energy sources used by cells then provide two (2) examples of when / in what cells / situations your chosen energy sources are used. Next describe two (2) forms of transport within the cell and the specific energy source used in each form of transport.
The effectiveness of dieting has been debated for years. There are several diets available including Atkins, Zone, Carbohydrate, Weight – Watchers, Jenny Craig, Dukan, Mediterranean, or 22 Day Vegan. Choose two (2) diets that were listed previously then explain four (4) effects each of your selected diets has on one’s energy and overall health including any hazardous effects.
Review the animation on enzymes found here then in your own words define the term enzyme. Next choose one (1) enzyme of your choice then determine its function in the body
week 4
“DNA and RNA, Genes, Mutations, and Gene Therapies”
Note:Online students, please respond to one (1)of the following four (4) bulleted items.
Examine three (3) differences between DNA and RNA then explain two (2) main reasons why DNA is the most favorable molecule for genetic material. Next suggest how RNA compares to DNA in regards to genetic material.
Go to The Guardianwebsite and read the article titled “Mind-control device lets people alter genes in mice through power of thought” found here. Next discuss three (3) main points of the article you found most significant then explain two (2) ways the article you read relates to this week’s lesson. Provide examples of this relation with your response.
Mutations are the original source of genetic variation. Explain how mutations can be either beneficial or harmful then provide an example for each. Next identify a disease, which is caused by a mutation, and then describe the biological basis of your chosen disease. In your response be sure to note the exact disease causing mutation.
Briefly describe the biology behind DNA-based Vaccines and Gene Therapy. Next suggest what you believe are the major similarities and differences between these two (2) therapies. Which do you believe is the best option? Justify your response.
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