Which of the following statements about amino acids is true

Which of the following statements about amino acids is true? Most of the amino acids used in protein biosynthesis have charged side chains. All amino acids contain an NH_2 and a COOH group Twenty-two amino acids are commonly found in proteins. Amino acids are often linked together to form branched polymers.

Solution

Correct answer is :B.All aminoacids contains an NH2 group and a COOH group.

Reason:NH2 group, COOH group and R group are always included in the structure of aminoacids.