Multiple choice

A tripeptide is a peptide which on hydrolysis yields three amino acids. Among the following ---------------------- is a tripeptide.

  1. glucose

  2. glutamic acid

  3. Glutaraldehyde

  4. Glutathione
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D Correct answer
Explanation

Glutathione (GSH) is a tripeptide that contains an unusual peptide linkage between the amine group of cysteine and the carboxyl group of the glutamate side chain. It is an antioxidant preventing damage to important cellular components caused by reactive oxygen species such as free radicals and peroxides.

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