Which of the following is `alpha-"amino"` acid ?

Which of the following in alpha -amino acids having a phenolic -OH group in its backbone ?

Which of the following alpha -amino acids is not optically active?

Which of the following alpha -amino acids is not optically active?

Which of the following is not an alpha -amino acid ?

Which of the following is not an alpha -amino acid?

Which of the following is not an alpha -amino acid?

Which of the following alpha -amino acids does not contain a chiral carbon ?

Which of the following is not an alpha -amino acid? Cysteine, Tyrosine, Trypsin, Proline, Serine

Carboxylic acids containing an amino group (-NH_(2)) as a substituent are called amino acids. When this amino group substitution is at alpha position with respect to carboxylic group, the aminoacid is called alpha -amino acid. The aminoacids with two carboxylic acids are called acidic amino acids whereas aminoacids with two amino group are called basic amino acids Amino acids show amphoteric character. Ali chiral natural amino acids exist in L-form. : Which of the following is not an alpha -amino acid?