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Biomolecules question

2023 · 8 Apr · Shift 1 · Q11
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Biomolecules question

2023 · 8 Apr · Shift 1 · Q11

JEE MainChemistryBiomoleculesMCQ+4 / −1
Sulphur (S) containing amino acids from the following are: (a) isoleucine (b) cysteine (c) lysine (d) methionine (e) glutamic acid
  1. A
    b, d
  2. B
    a, d
  3. C
    b, c, e
  4. D
    a, b, c
View written solutionFree

Correct answer: A

  1. Identify which amino acids contain sulphur

    Among standard amino acids, the sulphur-containing ones are:

    • Cysteine: contains the thiol group (−SH)(-SH)(−SH)
    • Methionine: contains sulphur in a thioether linkage

  2. Check each given amino acid

    • (a) Isoleucine: no sulphur
    • (b) Cysteine: contains sulphur
    • (c) Lysine: no sulphur
    • (d) Methionine: contains sulphur
    • (e) Glutamic acid: no sulphur

  3. Select the correct set

    Therefore, the sulphur-containing amino acids are (b) cysteine and (d) methionine.

  4. Match with options

    • A: b, d ✅
    • B: a, d ❌
    • C: b, c, e ❌
    • D: a, b, c ❌

Hence, the correct answer is Option A.

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