Question

A sulphur containing amino acid is

• A. Glycine
• B. Cysteine
• C. Alanine
• D. Leucine

Answer 1

The correct option is B Cysteine

A sulphur containing amino acid is cysteine.

Cysteine is an $\alpha$-amino acid with the chemical formula $C_3{H}_{7}N{O}_{2}S$. It is a semi-essential amino acid, which means that it can be biosynthesized in humans.

When taken as a supplement, it is usually in the form of N-acetyl-L-cysteine (NAC). The body makes this into cysteine and then into glutathione, a powerful antioxidant.

Option B is correct.