Glycogen phosphorylase releases glucose-1 phosphate from glycogen. Imagine that

Question

Glycogen phosphorylase releases glucose-1 phosphate from glycogen. Imagine that this occurs in muscle under anaerobic conditions. Suppose further that the glucose-1-phosphate is processed by lactic acid fermentation. How many ATP are produced, net, in catabolizing glucose-1-phosphate anaerobically to 2 lactate? A. 1 B. 2 C. 3 D. 4 E. 5 Recall that glycerol and the "last"3 C atoms of odd numbered fatty acyl chains are glucogenic. Imagine a triglyceride that contained 3 odd numbered fatty acyl chains. What is the maximum number of glucose molecules that could be synthesized from catabolism of this triglyceride molecule? A. 4 B.1/2 C. 1 D. 1 1/2 E. 2 Which of the following protein complexes is involved in the oxidation of NADH (ultimately by O_2) in electron transport? A. Complex I B. Complex III C. Complex IV D. All of the above. What is true about fatty acid synthesis? A. It is the direct (or exact) reversal of beta-oxidation B. The growing fatty acyl chain is attached to Coenzyme A in fatty acid synthesis. C. Malonyl-S-ACP is the molecule that reacts in turn" after "turn" to add 2-carbon units to the growing fatty acyl chain. D. All of the above are true. What is true about cholesterol biosynthesis? A. This does not occur in humans, but does in bacteria and plants B. Statins competitively inhibit HMG-CoA reductase. C. The starting point for cholesterol biosynthesis is malonyl-S-CoA. D. None of the above is a true statement. Which of the following is NOT glucogenic? A. acetyl CoA B. glycerol C. oxaloacetate D. lactate E. all of the above are glucogenic

Explanation / Answer

15) B.2 atps is the net gain as four are formed and two are utilised in the lactate acid fermentation.

16) C.1 glucose is formed from the catabolism of triglyceride molecule with three fatty acyl chains.

17) A.Oxidation of NADH takes in protein complex I.

18) C

19) B.Statins competitively inhibits HMG CoA reductase and thus reducing cholesterol synthesis.

20) A .AcetylCoA is not glucogenic.

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