Question

Match List I and List II

	List I Name of Vitamin		List II Functions of Vitamins
A	Riboflavin	I	The electron acceptor for isocitrate dehydro- genase
B	Niacin	II	Decarboxylation of alpha-ketoglutarate dehydrogenas
C	Thiamine	III	Part of coenzyme A
D	Pantothenic acid	IV	Cofactor for succinate dehydrogenase
		V	Enzyme activity regulator, such as for protein kinase C

Choose the correct answer from the options given below:

• A. A-IV, B-I, C-II, D-III
• B. A-III, B-II, C-IV, D-V
• C. A-I, B-III, C-IV, D-II
• D. A-II, B-V, C-I, D-IV

Answer 1

The Correct Option is A

To solve this question, we need to match the vitamins in List I with their respective functions in List II. Here's the step-by-step reasoning:

1. Riboflavin (Vitamin B2): Riboflavin is a cofactor for the enzyme succinate dehydrogenase, which is involved in the Krebs cycle. Therefore, the correct match is IV (Cofactor for succinate dehydrogenase).
2. Niacin (Vitamin B3): Niacin is a key component of NAD+ and NADP+, which are used in the electron transport chain and play an essential role as electron acceptors. Therefore, the correct match is I (The electron acceptor for isocitrate dehydrogenase).
3. Thiamine (Vitamin B1): Thiamine is involved in the decarboxylation of alpha-keto acids in the Krebs cycle, specifically the conversion of alpha-ketoglutarate to succinyl-CoA, meaning the correct match is II (Decarboxylation of alpha-ketoglutarate dehydrogenase).
4. Pantothenic acid (Vitamin B5): Pantothenic acid is a component of coenzyme A, a critical enzyme in metabolism. Therefore, the correct match is III (Part of coenzyme A).

Based on the above explanation, the correct matching is:

• A-IV: Riboflavin is the cofactor for succinate dehydrogenase.
• B-I: Niacin is the electron acceptor for isocitrate dehydrogenase.
• C-II: Thiamine is involved in the decarboxylation of alpha-ketoglutarate dehydrogenase.
• D-III: Pantothenic acid is part of coenzyme A.

Thus, the correct answer is A-IV, B-I, C-II, D-III.