Essential amino acids include

Options

A. leucine
B. valine
C. tryptophan
D. all of these

Answer

D

Explanation

Essential amino acid are those which cannot be systhesised by organism in the body and are obtained from plants, e.g., valine, leucine, isoleucine phenylalanine, threonine, lysine, tryptophan, methionine.
Non-essential amino acids can be synthesised by the organism and may not be the requisite components of diet, e.g., serine cysteine, proline, glycine asparagine, glutamine and tyrosine.