Which Amino Acids are Humans Unable to Synthesize

Question

Which amino acids are humans unable to synthesize?
A)all amino acids
B)most of the essential amino acids
C)the unnecessary amino acids
D)essential amino acids

Accepted Answer

Humans are unable to synthesize essential amino acids, which are required to be obtained through the diet. There are nine essential amino acids including tryptophan, histidine, valine, phenylalanine, threonine, methionine, leucine, isoleucine, and lysine.