Multiple choice

Which amino acid acts as a precursor of Nitric oxide in biological systems?

  1. Histidine

  2. Arginine

  3. Citrulline

  4. None of these

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

Arginine is the substrate for the enzyme nitric oxide synthase, which converts it into nitric oxide and citrulline in biological systems.