Which vitamin acts as a coenzyme for the enzyme methionine synthase, playing a critical role in homocysteine metabolism?

A Vitamin B6
B Vitamin B9
C Vitamin B12 ✓
D Vitamin C

Explanation

Vitamin B12 serves as a coenzyme for methionine synthase, facilitating the conversion of homocysteine to methionine and maintaining healthy homocysteine levels.

Mnemonic

B12 = Blood and Bone

Source

Harvard School of Public Health
Vitamins Biochemistry Homocysteine Metabolism Medium MEDICAL Confidence: high