37. What is the primary source of NADPH used for fatty acid biosynthesis in most animal tissues? (A) The citric acid cycle. (B) The pentose phosphate pathway. (C) Glycolysis. (D) The conversion of ADP to ATP in the mitochondria. (E) Lactic acid fermentation.

1. Compare the two reaction coordinate diagrams below and select the answer that correctly describes their relationship. In eachcase, the single intermediate is the ES complex.Free energy, (A) Diagram (a) describes a strict "lock and key" model, whereas diagram (b) describes a transition-state complementarity model. (B) The activation energy for the catalyzed reaction is #5 in diagram (a) and is #7 in diagram (b). (C) The activation energy for the uncatalyzed reaction is given by #5 + #6 in diagram (a) and by #7 + #4 in diagram (b). (D) The contribution of binding energy is given by #5 in diagram (a) and by #7 in diagram (b). (E) The ES complex is given by #2 in diagram (a) and #3 in diagram (b).

37. What is the primary source of NADPH used for fatty acid biosynthesis in most animal tissues?
(A) The citric acid cycle.
(B) The pentose phosphate pathway.
(C) Glycolysis.
(D) The conversion of ADP to ATP in the mitochondria.
(E) Lactic acid fermentation.

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