NEET 2020 · BiologyAmino acids/proteinsPrevious Year Question
Identify the basic amino acid from the following
Answer: (A) Lysine. Answer: (A) Lysine.
- A.Lysine✓
- B.Valine
- C.Tyrosine
- D.Glutamic Acid
Correct Answer
(A) Lysine
Solution & Explanation
Answer: (A) Lysine. Solution: Amino acids are classified by the number of amino and carboxyl groups in their R group into acidic, basic and neutral types. NCERT names glutamic acid as acidic, lysine as basic and valine as neutral, with tyrosine listed among the aromatic amino acids. Hence the basic amino acid here is lysine. NCERT Reference: Ch 9, p.106, line ~8 — "there are acidic (e.g., glutamic acid), basic (lysine) and neutral (valine) amino acids."
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