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Match List I with List II. List I (Amino Acid) List II (Structural Feature) A. Tyrosine I. Imidazole ring B. Histidine II. Thioether group C. Methionine III. Phenolic - OH group D. Threonine IV. Secondary alcoholic group with a chiral centre Choose the correct answer from the options given below:

Options

  1. AA-IV, B-I, C-II, D-III
  2. BA-III, B-I, C-II, D-IV
  3. CA-III, B-II, C-I, D-IV
  4. DA-IV, B-II, C-I, D-III

Correct answer

B. A-III, B-I, C-II, D-IV

Step-by-step solution

Tyrosine contains a phenolic - OH group in its side chain. Histidine contains an imidazole ring. Methionine contains a thioether group ( - S - CH ₃ ) in its side chain. Threonine contains a secondary alcoholic group and has a second chiral centre at the -carbon. Therefore, the correct match is A-III, B-I, C-II, D-IV. Answer: A-III, B-I, C-II, D-IV

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