The total number of distinct naturally occurring amino acids obtained by complete acidic hydrolysis of the peptide shown below is

Proteins are hydrolysed by enzymes into

Optically inactive amino acid is :-

Among the following,the achiral amino acid is

Amino acids can be classified as $\alpha$,$\beta$,$\gamma$,$\delta$ and so on,depending upon the relative positions of the amino group with respect to the carboxyl group. Which type of amino acids form polypeptide chains in proteins?

Identify the $N$-terminal and $C$-terminal $\alpha$-amino acids respectively in the following polypeptide fragment: $Ala-Gly-Ser-Tyr-Gly$.