Which one of the following amino acids is an essential part of human diet ?
(a) Glycine
(b) Phenylalanine
(c) Serine
(d) Aspartic
Correct option (b) Phenylalanine Explanation :
For human beings, eight amino acids are essential. These are leucine isoleucine lysine, methionine, phenylalanine, threonine, tryptophan and valine.
