Question

Coenzyme A is a co-factor of vitamin

• A. riboflavin
• B. pantothenic acid
• C. folic acid
• D. pyridoxine

Hint:

Remember: Coenzyme A is derived from Vitamin \(B_5\) (pantothenic acid), while FAD and FMN are derived from Vitamin \(B_2\) (riboflavin).

Answer 1

The Correct Option is B

Step 1: What we are matching.
Coenzyme A is built around a vitamin. We need to name that vitamin.

Step 2: Recall the build of CoA.
Coenzyme A carries a reactive thiol end and is used to move acetyl and acyl groups around in metabolism. Its backbone is made from pantothenic acid, which is vitamin B5.

Step 3: Knock out the others.
Riboflavin (B2) builds FAD and FMN. Folic acid handles one carbon transfers. Pyridoxine (B6) makes pyridoxal phosphate for amino acid work. None of these forms CoA.

Step 4: Answer.
So the vitamin behind Coenzyme A is pantothenic acid. \[ \boxed{\text{pantothenic acid}} \]