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JEE Main2026Apr 2, Shift 2Chemistry
Q.

Identify the correct pair having amino acid (A) and the hormone (B) that is iodinated derivative of the amino acid (A).

(T and Y represent one letter code for amino acids)

Amino acid (A) Hormone (B)
(1) T Insuline
(2) T Thyroxine
(3) Y Thyroxine
(4) Y Insuline
  1. A

    T — Insuline

  2. B

    T — Thyroxine

  3. C

    Y — Thyroxine

  4. D

    Y — Insuline

Solution

Thyroxine is the iodinated tyrosine-derived thyroid hormone (specifically, -tetraiodothyronine, T4).

The single-letter code for tyrosine is Y (T is reserved for threonine).

Insulin is a peptide hormone of amino acids; it is not a single iodinated amino-acid derivative.

Hence the correct pair is Y Thyroxine.

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