Question

Which one is not an essential amino acid?

• A. Leucine
• B. Lysine
• C. Methionine
• D. Alanine

Answer 1

The correct option is D Alanine

Essential amino acids are those which are not synthesized inside the body. It taken into the body through the diet. Alanine is a non-essential amino acid. It is produced inside the body. Pyruvate and branched chain amino acid acts as a precursor for alanine. It is utilized during synthesis of proteins. Glutamate can then transfer its amino group through the action of alanine aminotransferase to pyruvate, a product of muscle glycolysis, forming alanine and α-ketoglutarate.

So, the correct answer is option D.