<prompt> Cofactor involve in sulphur containing amino acid metabolism is?Folic acidBiotinVitamin B 1Vitamin B 12  <response>: ANSWER: D Vitamin B 12REF: Lehninger Principles of Biochemistry 4tR edition page 674Sulphur conatining amino acids are methionine, cystine and cysteineVitamin B 12 is a co-factor for methionine synthetase; it helps to convert homocysteine to methionine 