BIO 122 Exam 2 10-11 answer key

BIO 122 Exam 2 10-11 answer key - Stanford and Kabnick Fall...

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Stanford and Kabnick Fall 2011 Name: _______________________ Section: _____________________ Bio 122 Cells and Genetics Fall 2011 Exam II Instructions: On your Scantron sheet, write your name and ID number in the space provided. Darken the corresponding circles on the top of your Scantron form. Choose the one best correct answer to the following questions. You will have to mark the correct answer on the Scantron form that you have been provided with. There is only one correct answer for each question! Please read each question carefully. Good luck! 1. Which of the following statements best describes the relationship between photosynthesis and respiration? A) Respiration is the direct reversal of the biochemical pathways of photosynthesis B) Photosynthesis occurs only in plants and respiration occurs only in animals C) ATP molecules are made in photosynthesis and used in respiration D) Respiration is anabolic and photosynthesis is catabolic E) Photosynthesis stores energy in complex organic molecules, while respiration releases energy from complex organic molecules E is correct. Importantly, respiration is not the exact opposite of photosynthesis. The pathways used to generate and break down glucose are quite different! 2. What products of the light reactions of photosynthesis are used in the Calvin cycle? A. Oxygen and carbon dioxide B. Carbon dioxide and water C. ATP and NADPH D. NADP + and oxygen E. Glyceraldehyde-3-phosphate (G3P) and NADP + C is correct. Oxygen is made by the light reactions, but it is not used in the Calvin cycle. Carbon dioxide is used in the Calvin cycle, but it is not a product of the light reactions. Water is used by the light reactions – it is not a product of those reactions, and it is not used in the Calvin cycle. NADP+ and oxygen are not used by the Calvin cycle. Glyceraldehyde-3-phosphate (G3P) and NADP + are products of the Calvin cycle. 3. Electron transport chains are used to generate energy in both cellular respiration, and in the light reactions of photosynthesis. Which of the following are true: A. In photosynthesis, electrons from photosystem II are transferred down an electron transport chain to the reaction center of photosystem I. Ultimately, this leads to the generation of energy through chemiosmosis
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Stanford and Kabnick Fall 2011 B. In cellular respiration, electrons harnessed from various redox reactions in glycolysis, the generation of acetyl CoA, and in the citric acid cycle, are transferred down an electron transport chain to oxygen, ultimately generating water, and at the same time, generating energy through chemiosmosis C. In both photosynthesis and cellular respiration, it is generation of a proton gradient, which is ultimately harnessed by ATP synthase to make ATP D. All of the above D is correct 4. The oxygen we breathe is primarily generated: A. By the Electron Transport Chain used in cellular respiration B. In response to light activation of Photosystem I C. From water D. By the Calvin Cycle E. All of the above
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BIO 122 Exam 2 10-11 answer key - Stanford and Kabnick Fall...

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