Question

Lysine and tryptophan are

• A. proteins
• B. non-essential amino acids
• C. essential amino acids
• D. aromatic amino acids

Answer 1

The correct option is C essential amino acids

• Lysine and tryptophan are essential amino acids. The essential amino acids are those which are not synthesised by our body and necessary ta take up from the regular diet.
  
• Non essential amino acids are those which are synthesised in our body.
• Aromatic amino acids are those which contains an aromatic rind structure i.e; phenyl group attached to the amino acid chain.
• Proteins are the nitrogenous organic compounds composed of long chain of amino acids.

So, the correct option is 'Option C' .