Question:
The coenzyme form of pyridoxine (vitamin B6) is?
The coenzyme form of pyridoxine (vitamin B6) is?
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Vitamin B6 must be phosphorylated to become active; think pyridoxal phosphate.
Updated On: Jun 24, 2026
- ADP
- NAD
- PLP
- FAD
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The Correct Option is C
Solution and Explanation
Step 1: Pyridoxine is one of the three forms of vitamin B6 (along with pyridoxal and pyridoxamine). To act as a coenzyme, vitamin B6 must first be phosphorylated.
Step 2: The metabolically active coenzyme form is pyridoxal 5-phosphate, abbreviated PLP. PLP is the cofactor for transamination, decarboxylation, and deamination reactions of amino acids.
Step 3: The other options are coenzymes derived from different vitamins. NAD comes from niacin (B3), FAD comes from riboflavin (B2), and ADP is an adenine nucleotide energy carrier, not a B6 derivative.
Hence the coenzyme form of pyridoxine is PLP.
Step 2: The metabolically active coenzyme form is pyridoxal 5-phosphate, abbreviated PLP. PLP is the cofactor for transamination, decarboxylation, and deamination reactions of amino acids.
Step 3: The other options are coenzymes derived from different vitamins. NAD comes from niacin (B3), FAD comes from riboflavin (B2), and ADP is an adenine nucleotide energy carrier, not a B6 derivative.
Hence the coenzyme form of pyridoxine is PLP.
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