F09 Bio1010 Exam Microbiology

C the light reactions supply the calvin cycle with

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Unformatted text preview: following, which wavelength of light (as shown in the figure) is most effective in driving photosynthesis? A. B. C. D. E. 420 nm 475 nm 575 nm 675 nm 730 nm 12. Which of the following statements best represents the relationships between the light reactions and the Calvin cycle? A. The light reactions provide ATP and NADPH to the Calvin cycle, and the cycle returns ADP, Pi, and NADP+ to the light reactions. B. The light reactions provide ATP and NADPH to the carbon fixation step of the Calvin cycle, and the cycle provides water and electrons to the light reactions. C. The light reactions supply the Calvin cycle with CO2 to produce sugars, and the Calvin cycle supplies the light reactions with sugars to produce ATP. D. The light reactions provide the Calvin cycle with oxygen for electron flow, and the Calvin cycle provides the light reactions with water to split. E. There is no relationship between the light reactions and the Calvin cycle. 5 13. Which of the following is the best explanation for why the light reactions have both cyclic and noncyclic electron pathways? A. because the light ­independent reactions require ATP and NADPH in different amounts than are generated by noncyclic electron flow. B. to ensure that ATP and NAPDH are generated in a 1:1 molar ratio. C. because the different pathways generate different carbon skeletons for use in later reactions. D. to provide more electrons from water than would be released by the noncyclic pathway. 14. All of the following statements are true regarding both eukaryotic respiration and photosynthesis, EXCEPT: A. B. C. D. E. ATP generation by chemiosmosis occurs inside the organelles. Electron carriers (NAD+ or NADP+) are involved in some key reaction steps. Transfer of electrons occurs via electron acceptors, including cytochrome complexes. Oxygen is the final electron acceptor in both sets of reactions. Both processes involve a series of redox reactions. 15. Which of the following statements is correct regarding photorespiration? A. Photorespiration is an energy ­requiring process that reduces the efficiency of photosynthesis. B. Photorespiration do...
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