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Biomolecules question

2025 · 29 Jan · Shift 2 · Q2
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Biomolecules question

2025 · 29 Jan · Shift 2 · Q2

JEE MainChemistryBiomoleculesMCQ+4 / −1
Identify the essential amino acids from below: (A) Valine (B) Proline (C) Lysine (D) Threonine (E) Tyrosine Choose the correct answer from the options given below:
  1. A
    (A), (C) and (D) only
  2. B
    (C), (D) and (E) only
  3. C
    (A), (C) and (E) only
  4. D
    (B), (C) and (E) only
View written solutionFree

Correct answer: A

  1. Recall the essential amino acids
    Essential amino acids are those which the human body cannot synthesize and hence must be obtained from diet. Common essential amino acids include:

    Valine, Leucine, Isoleucine, Lysine, Methionine, Threonine, Tryptophan, Phenylalanine\text{Valine, Leucine, Isoleucine, Lysine, Methionine, Threonine, Tryptophan, Phenylalanine}Valine, Leucine, Isoleucine, Lysine, Methionine, Threonine, Tryptophan, Phenylalanine

    (Histidine is also considered essential, especially in growing children.)

  2. Check each amino acid given in the question

    • (A) Valine: Essential ✅
    • (B) Proline: Non-essential ❌
    • (C) Lysine: Essential ✅
    • (D) Threonine: Essential ✅
    • (E) Tyrosine: Non-essential ❌
      Tyrosine can be synthesized from phenylalanine.
  3. Collect the essential amino acids from the list

    Valine, Lysine, Threonine\text{Valine, Lysine, Threonine}Valine, Lysine, Threonine

    These correspond to:

    (A),(C),(D)(A), (C), (D)(A),(C),(D)

  4. Match with the given options

    • Option A: (A),(C)(A), (C)(A),(C) and (D)(D)(D) only ✅
    • Option B: includes Tyrosine ❌
    • Option C: includes Tyrosine ❌
    • Option D: includes Proline and Tyrosine ❌
  5. Final answer The correct option is:

    A\boxed{\text{A}}A​

  6. Comparison with stored correct answer Stored correct answer = A
    Derived answer = A
    Hence, they agree.

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