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MCQEasyJEE Main 2026 · 28 January, Shift 1Proteins (Amino Acids, Structure, Denaturation)

Chemistry Question from JEE Main 2026 · 28 January, Shift 1

In the given pentapeptide, find out an essential amino acid (YY) and the sequence present in the pentapeptide.

Pentapeptide structure shown from left to right with H2N at the N-terminus and COOH at the C-terminus, containing side chains corresponding to threonine, serine, aspartic acid, glycine, and alanine residues.

Choose the correct answer from the options given below:

  • A

    Y=Y = Threonine;\quad Sequence: Thr–Ser–Asp–Gly–Ala

  • B

    Y=Y = Serine;\quad Sequence: Ser–Asp–Thr–Ala–Gly

  • C

    Y=Y = Serine;\quad Sequence: Thr–Ser–Asp–Ala–Gly

  • D

    Y=Y = Threonine;\quad Sequence: Ser–Thr–Asp–Gly–Ala

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