25. Name the enzyme catalyzing the reaction: H-C-COO . + CH3-C-SCoA OC-CH-CH-COO

Question

25. Name the enzyme catalyzing the reaction: H-C-COO . + CH3-C-SCoA OC-CH-CH-COO + SCOA a. aconitase. b. citrate lyase c. malate synthase d. malate dehydrogenase e. succinate synthase 26. Which among the listed TCA cycle intermediates would not accumulate in the presence of Malonate? a. a-ketoglutarate b. isocitrate c citrate d. succinyl-CoA e. fumarate 27. Which reaction is the TCA cycle is not inhibited by high level of NADH? a. citrate synthase b. isocitrate dehydrogenase c. a-ketoglutarate dehydrogenase d. pyruvate dehydrogenase complex e. succinate dehydrogenase 28. How many pairs of hydrogen are extracted during the operation of one round of TCA cycle? a, 1 b, 2 c.3d.4e. 29. Ca2* is an allosteric activator of the following enzyme: dehydrogenase phosphatase e. aconitase 30. What is the effect of insulin on the pyruvate dehydrogenase complex? a. citrate synthase b. fumarase c. malate dehydrogenase. d. pyruvate it activates pyruvate dehydrogenase kinase b. it inhibits the formation of Acetyl-CoA c, it activates dihydrolipoyl transacetylase d. it inhibits pyruvate dehydrogenase e. activates pyruvate dehydrogenase phosphatase

Explanation / Answer

25)Citrate lyase

26)Fumarate

27)Succinate dehydrogenase

28)4

29)Dehydrogenase phosphatase

30)It activates pyruvate dehydrogenase phosphatase.

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