Multiple choice

The amino acid that contains a sulphur atom in its side chain and can form disulphide bonds is

  1. cysteine

  2. methionine

  3. serine

  4. cystine

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Cysteine contains a sulfhydryl (-SH) group in its side chain. Two cysteine residues can oxidize to form a disulfide bond (-S-S-), creating cystine. The sulfur atom in cysteine's side chain is essential for this bond formation.