Question

Which one of the following is an essential amino acid?

• A. Valine
• B. Serine
• C. Cystein
• D. Proline

Answer 1

Answer: (A)

Valine is an essential amino acids.
Histidine, isoleucine, leucine, lysine, methionine phenylalanine, threonine, tryptophan are some essential amino acids.
Alanine, argine, asparagine, aspartic acids, cysteine, glutamic acid, glutamine, glycine, proline, serine are some non essential amino acids.