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Basic amino acids from the following are: (a) Histidine (b) Alanine (c) Arginine (d) Valine (e) Lysine

Options

  1. A(c) and (e) only
  2. B(a), (b) and (c) only
  3. C(a), (c) and (e) only
  4. D(b) and (d) only

Correct answer

C. (a), (c) and (e) only

Step-by-step solution

Basic amino acids contain more basic groups (like amino, guanidino, or imidazole) than carboxyl groups in their structure. Histidine contains an imidazole ring, making it basic. Arginine contains a guanidino group, making it strongly basic. Lysine contains an -amino group, making it basic. Alanine and Valine are neutral aliphatic amino acids because they contain exactly one amino group and one carboxyl group. Therefore, the basic amino acids from the given list are (a), (c), and (e). Answer: (a), (c) and (e) only

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