Cell biology 29. Enzyme catalysis mechanism that utilizes a change in the confor

Question

Cell biology 29. Enzyme catalysis mechanism that utilizes a change in the conformation of the substrate to bring it clos to the conformation of the transition state. A) Induced strain B) Changing Substrate Reactivity C) Substrate Orientation D) A and B E) A and C 30. For the reaction A EF+H (AG+7.2), which of the following reactions would be an appropriate coupled reaction in a metabolic pathway? A)D+EGI (AG 74) B)A CX+P (AG-9.2) C) F+N+M (AG-7.2) 31. Two metabolic pathways intersect, and the enzyme basinase participates in both of the intersecting pathways. Pathway #1 uses substrate A while pathway #2 uses substrate B. Basnase converts substrate A into the final product C, and converts substrate B into the final product D. If substrate A levels are higher than substrate B, the enzyme converts A to product C, but the conversion of B to D not inhibited. If substrate B levels are higher than substrate A, the enzyme converts B to product D, b the conversion of A to C is not inhibited. Which of the following is true? A) A and B are competitive inhibitors B) A and B are C) A and B work as allosteric inhibitors D) D and E work as allosteric inhibitors E) Basinase may have two distinct domains that act as separate active sites 32. During glycolysis, how many molecules of NADH are generated from the conversion of glucose into 2 molecules of pyruvate? A) 0 B) 1 C) 2 D) 3 E) 4 33. Conversion of acetyl coA into amino acids is a type of that involves an overal of ATP A) Anabolic pathway, loss B) Anabolic pathway; gain C) Catabolic pathway; loss D) Catabolic pathway: gain E) Oxidative-reduction pathway; loss 34. How may ATP molecules are generated from a single 360 rotation of the c wheel of ATP synthase? ) C) 6 D) 8 E) Depends on the number of c subunits in the wheel 35. What are the primary products of the TCA cycle? A) FADH2 B) NADH C) ADP D) A andB E) All of the above

Explanation / Answer

29. E - Induces strain and substrate orientation

30. C

31. E both are not a inhibitor to enzyme

32. C - 2   1 glucose give 2 molecules NADH glyceraldehyde 3 phosphate to 1,3 bisphopho glycerate

33. A Anabolic pathway : loss. Synthesis of amino acids is a anabolic process. Also here acetyl coA is useit is the main precursor synthesis of ATP.

34. B - 3 Full rotation goves 3 ATP. ATP synthetase has 3 beta site. For one full rotation 3 beta site produecs 3 ATP.

35. D TCA produces NADH and FADH2

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