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JEE Main 2025 Apr 2 Shift 2, Chemistry Q19: Proteins

JEE Main2025Apr 2, Shift 2Chemistry
Q.

A tetrapeptide "x" on complete hydrolysis produced glycine (Gly), alanine (Ala), valine (Val), leucine (Leu) in equimolar proportion each. The number of tetrapeptides (sequences) possible involving each of these amino acids is

  1. A

    16

  2. B

    32

  3. C

    8

  4. D

    24

Solution

A tetrapeptide formed from four different amino acids (Gly, Ala, Val, Leu), each present exactly once, is determined entirely by the order in which the residues are linked.

The number of distinct orderings of four distinct units is .

24 different tetrapeptide sequences are possible.

Concept behind this question

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