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Among the following compounds most basic amino acid is (1) Lysine (2) Asparagine (3) Histidine (4) Serine

1. (1) Lysine
2. (2) Asparagine
3. (3) Histidine
4. (4) Serine

Correct answer: (1) Lysine

Solution

Lysine carries an additional amino (-NH2) group on its side chain, giving it the highest basicity among the listed amino acids. Hence lysine is the most basic.

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