Various coenzymes are involved in metabolism, assisting enzymes to perform speci
ID: 310477 • Letter: V
Question
Various coenzymes are involved in metabolism, assisting enzymes to perform specific chemical reactions. Many of these coenzymes are derived from vitamins, and they act as cosubstrates or as prosthetic groups. Which one of the combinations below correctly identifies the vitamin precursor for the given coenzyme and the form in which the coenzyme plays its role in the specific reaction?
A.) CoA / pantothenic acid / prosthetic group B.) NADH / niacin / cosubstrate C.) NADP+ / riboflavin / prosthetic group D.) ADH2 / niacin / prosthetic group E.) biotinyl-lysine / biotin / cosubstrate
Which reaction or reactions in the scheme of glycolysis shown below is/are "energy capture" steps? (Shown Below)
A.) A and C B.) E and H C.) D, E and H D.) A, C and D
Explanation / Answer
A.) CoA / pantothenic acid / prosthetic group ----> TRUE
B.) NADH / niacin / cosubstrate ----> FALSE ( NADH is a coenzyme)
C.) NADP+ / riboflavin / prosthetic group ---> FALSE (NADP+ is from niacin)
D.) ADH2 / niacin / prosthetic group ---> FALSE (ADH2 is not a prosthetic group)
E.) biotinyl-lysine / biotin / cosubstrate ----> FLASE (Biocytin or biotinul-lysine is a prosthetic coenzyme)
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