The number of possible tripeptides formed involving alanine (ala), glycine (gly) and valine (val), where no amino acid has been used more than once is:

The number of possible tripeptides formed involving alanine, glycine and valine, where no amino acid has been used more than once is

Q. The number of possible tripeptides formed involving alanine (ala), glycine (gly) and valine (val), where no amino acid has been used more than once is:

(A) 8

(B) 3

(D) 6

Correct Answer: 6

Explanation

A tripeptide consists of three amino acids arranged in a specific sequence.

Here, three different amino acids are given:

Alanine (ala), Glycine (gly), Valine (val)

No amino acid is repeated, so the total number of possible tripeptides is equal to the number of permutations of three different amino acids.

Number of tripeptides = 3! = 6

The possible tripeptides are:

ala–gly–val ala–val–gly gly–ala–val gly–val–ala val–ala–gly val–gly–ala

Hence, the number of possible tripeptides is 6.

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