A tetrapeptide is made of naturally occurring alanine, serine, glycine and valine. If the C-terminal amino acid is alanine and the N-terminal amino acid is chiral, the number of possible sequences of the tetrapeptide is

Question

A tetrapeptide is made of naturally occurring alanine, serine, glycine and valine. If the C-terminal amino acid is alanine and the N-terminal amino acid is chiral, the number of possible sequences of the tetrapeptide is (A) 12 (B) 8 (C) 6 (D) 4

Tardigrade Admin · Accepted Answer

A tetra-peptide is made of naturally occuring alanine serine glycine and valine.
It is given that

C

-terminal amino acid is alanine and

N

-terminal amino acid as it is an achiral amino acid. Therefore possible sequence of tetra-peptide are as follows.
(i) Alanine, glycine, serine, valine
(ii) Alanine, glycine, valine, serine
(iii) Alanine, serine, glycine, valine
(iv) Alanine, valine, glycine, serine
Thus it can have

4

possible sequences of the tetrapeptide.

Q. A tetrapeptide is made of naturally occurring alanine, serine, glycine and valine. If the C-terminal amino acid is alanine and the N-terminal amino acid is chiral, the number of possible sequences of the tetrapeptide is

12

8

6

4

Q. A tetrapeptide is made of naturally occurring alanine, serine, glycine and valine. If the $C$ -terminal amino acid is alanine and the $N$ -terminal amino acid is chiral, the number of possible sequences of the tetrapeptide is