Topic: Amino acids, peptide bond, protein structure, denaturation· Biomolecules

The non-essential amino acid among the following is :

1. valine

2. leucine

3. alanine

4. lysine

Doubtly Asked 30 Oct 2026 NEET UG 2019 Practice test neet Save WhatsApp Report

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Answer: 3. alanine

Essential amino acids cannot be made by the body and must come from food: valine, leucine, lysine (and isoleucine, etc.). Alanine can be synthesised in the body, so it is non-essential. Answer: option (3).

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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The non-essential amino acid among the following is :

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