23 Jul WHICH OF THE FOLLOWING ACCURATELY DESCRIBES A PROPERTY OF DNA?
l. Which of the following statements correctly describes the effect of a hypotonic environment on a Show more l. Which of the following statements correctly describes the effect of a hypotonic environment on a animal cell? a. The cell will undergo plasmolysis due to the out loss of water. b. The cell will undergo plasmolysis due to the influx of water. c. The cell will undergo osmotic lysis due to the influx of water. d. The cell will undergo osmotic lysis due to the loss of water. 2. Which of the following statements concerning protein structure is incorrect? a. The secondary structure of proteins involves bonding between R groups to form alpha helices and beta sheets. b. The quaternary structure of proteins involves the interaction of multiple proteins or polypeptide chains. c. The tertiary structure of proteins can be maintained by ionic bonding which occurs between a positively charged anion and a negatively charged cation. d. Two of the above are incorrect e. All of the above are incorrect 3. Which of the following correctly describes a saturated fatty acid? a. The absence of a double bond confers a linear structure resulting in a more liquid consistency. b. The presence of a double bond confers a bent structure resulting in a more liquid consistency. c. The absence of a double bond confers a linear structure resulting in a more solid consistency. d. The absence of a double bond confers a bent structure resulting in a more liquid consistency. e. The presence of a double bond confers a linear structure resulting in a more solid consistency. 4. Which of the following accurately describes a property of DNA? a. The two strands in a DNA molecule are considered antiparallel due to the directionality of each strand. b. DNA contains cytosine uracil and thymine. c. The complementary nature of the two strands in a DNA molecule means that an adenine is always paired with a guanine. d. Two of the above are correct e. All of the above are correct 5. Which of the following does not correctly state a property of bonding? a. Hydrogen bonds are stronger than van der Waals interactions. b. Ionic bonding is multi-directional while covalent bonding is uni-directional. c. Electrons will be shared unevenly between a carbon-hydrogen covalent bond. d. Two of the above are incorrect e. All of the above are correct 6. Which of the following statements does not relate to feedback inhibition? a. It is typically observed in biosynthetic pathways. b. It allows the cell to conserve energy/resources by not producing compounds that are not currently needed. C. It involves a compound or molecule that resembles the starting substrate. d. Two of the above are incorrect e. All of the above are correct 7. If nitrogen and oxygen form a covalent bond together which statement below accurately describes the interaction? a. Nitrogen would gain a partial negative charge because nitrogen is more electronegative than oxygen. b.Nitrogen would gain a partial negative charge because nitrogen is less electronegative than oxygen. c. Nitrogen would gain a partial positive charge because nitrogen is more electronegative than oxygen. d. . Nitrogen would gain a partial positive charge because nitrogen is less electronegative than oxygen. e. Neither nitrogen nor oxygen will gain partial charges because they have similar electronegativity values. 8. Which of the following statements does not accurately describe hydrogen bonding? a. Hydrogen bonding occurs between an atom with a partial positive and an atom with a partial negative charge. b. Hydrogen bonding is involved in maintaining the tertiary structure of proteins. c. Hydrogen bonding holds together the secondary structure of proteins and nucleic acids. d. Two of the above are incorrect e. All of the above are correct 9. Which of the following statements correctly describes peptidoglycan? a. It has a linear structure due to the presence of beta linkages. b. It has a helical structure due to the presence of beta linkages. c. It has a helical structure due to the presence of alpha linkages. d. It has a linear structure due to the presence of alpha linkages. e. None of the above are correct Show less
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