Exam4-2007 - CH369 Exam 4 Multiple Choice - Spring 2007 1....

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CH369 Exam 4 Multiple Choice - Spring 2007 1. The oxidation of succinate to fumarate by Complex II yields approximately how many ATP equivalents? a. 1 b. 2 c. 3 d. 4 e. 5 2. Uncoupling agents, such as dinitrophenol, serve to disrupt ATP generation via oxidative phosphorylation by a. binding protons in the matrix such that they cannot pass through ATP synthase. b. blocking the proton channel of ATP synthase. c. inhibiting electron transfer in Complex I. d. transferring protons from the intermembrane space back into the matrix. e. transferring protons from the matrix to the intermembrane space, bypassing the electron transport chain. 3. Which of the following is true of most photosynthetic pigments in plants? a. They contain a metal atom. b. They absorb visible light in the red and blue regions. c. They are highly conjugated molecules. d. They have heme-like, i.e. porphyrin ring, structures. e. None of these are true. 4. During the dark phase of photosynthesis, what intermediate is siphoned off the Calvin cycle to form glucose? a. glyceraldehyde-3-phosphate b. ribulose-1,5-bisphosphate c. 1,3-bisphosphoglycerate d. 3-phosphoglycerate e. ribulose-5-phosphate 5. Rubisco not only reacts with CO 2 but also reacts with a. oxygen, which results in a lower yield of 3-phosphoglycerate. b. oxygen, which results in a higher yield of 3-phosphoglycerate. c. nitric oxide, which results in a lower yield of 3-phosphoglycerate. d. nitric oxide, which results in a higher yield of 3-phosphoglycerate. e. None of the above.
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6. Plants utilize the C4 pathway in order to a. produce ribulose-1,5-bisphosphate. b. preferentially deliver CO 2 for reaction with rubisco. c. create a proton gradient used for photophosphorylation. d. synthesize starch in plants. e. None of these are true. 7. Glucose-1-phosphate reacts with which nucleotide triphosphate to extend a molecule of starch by one glucose unit? a. ATP b. CTP c. GTP d. TTP e. UTP 8. Fats travel through the lymphatic system in what form? a. fatty acids b. monoacylglycerides c. diacylglycerides d. triacylglycerides e. chylomicrons 9. Fatty acids are transported through the blood stream complexed to a. glycerol b. serum albumin c. chylomicrons d. bile e. None of these. They travel as free fatty acids. 10. Carnitine transports _________________ from the cytoplasm into the mitochondrial matrix. a. free fatty acids b. triacylglycerides c. acyladenylate d. acyl-CoA e. chylomicrons 11. β -oxidation of odd chain fatty acids produces ______________, which is converted into ______________. a. propionyl-CoA ; succinyl-CoA b. propionyl-CoA ; acetyl-CoA c. succinyl-CoA ; propionyl-CoA d. succinyl-CoA ; acetyl-CoA e. acetyl-CoA ; malonyl-CoA
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12. H 2 O 2 produced in the peroxisomes is the result of O2 reduction by a. FADH 2 b. FAD c. NADH d. NAD + e. NADPH 13. What is a beneficial function of peroxisomes in cells?
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Exam4-2007 - CH369 Exam 4 Multiple Choice - Spring 2007 1....

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