Easy MCQ +4 / -1 PYQ · JEE Mains 2025

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 <p>(A), (C) and (D) only</p> Correct answer
  2. B <p>(C), (D) and (E) only</p>
  3. C <p>(A), (C) and (E) only</p>
  4. D <p>(B), (C) and (E) only</p>

Solution

<p>The nine essential amino acids that must be obtained from the diet are:</p> <p><p>Histidine</p></p> <p><p>Isoleucine</p></p> <p><p>Leucine</p></p> <p><p>Lysine</p></p> <p><p>Methionine</p></p> <p><p>Phenylalanine</p></p> <p><p>Threonine</p></p> <p><p>Tryptophan</p></p> <p><p>Valine</p></p> <p>From the provided list:</p> <p><p>Valine (A) is essential.</p></p> <p><p>Proline (B) is non-essential.</p></p> <p><p>Lysine (C) is essential.</p></p> <p><p>Threonine (D) is essential.</p></p> <p><p>Tyrosine (E) is non-essential (it is considered conditionally essential, but under normal conditions it is non-essential).</p></p> <p>Thus, the essential amino acids among those listed are Valine, Lysine, and Threonine.</p> <p>So the correct answer is:</p> <p>$\textbf{Option A: (A), (C) and (D) only}$</p>

About this question

Subject: Chemistry · Chapter: Biomolecules · Topic: Carbohydrates

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