Biochemistry Branched chain amino acids A Are normally completely catabolised by muscle to CO2 and H2O B Can be catabolised by liver but not muscle C Are the main dietary amino acids metabolized by intestine D Are a major source of nitrogen for alanine and glutamine produced in muscle 💡 Explanation Branched chain amino acids ✓ Correct Answer: D. Are a major source of nitrogen for alanine and glutamine produced in muscle