Question: 137. Match List I with List II.
| List I | List II |
|---|---|
| A. Adenosine | I. Nitrogen base |
| B. Adenylic acid | II. Nucleotide |
| C. Adenine | III. Nucleoside |
| D. Alanine | IV. Amino acid |
Choose the option with all correct matches.
(1) A-III, B-IV, C-II, D-I
(2) A-III, B-II, C-IV, D-I
(3) A-III, B-II, C-I, D-IV
(4) A-II, B-III, C-I, D-IV
Answer: Option (3)
Explanation:
Adenosine is formed by linking the nitrogen base adenine with ribose sugar; hence it is a nucleoside, matching A-III.
Adenylic acid (AMP) is a nucleotide because it contains adenine + ribose sugar + one phosphate group; thus B-II is correct.
Adenine is a purine nitrogenous base, so it matches C-I.
Alanine is one of the standard amino acids, therefore it matches D-IV.