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Which of the following is a basic amino acid?

1. (a) Alanine
2. (b) Tyrosine
3. (c) Lysine
4. (d) Serine

Correct answer: (c) Lysine

Solution

Lysine is a basic amino acid due to the presence of an additional amino group in its side chain, which can accept a proton, making it basic in nature.

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