Question

Match with the tab test of amino acids.

• A. A \(\rightarrow\) I, B \(\rightarrow\) IV, C \(\rightarrow\) III, D \(\rightarrow\) II
• B. A \(\rightarrow\) IV, B \(\rightarrow\) I, C \(\rightarrow\) II, D \(\rightarrow\) III
• C. A \(\rightarrow\) I, B \(\rightarrow\) III, C \(\rightarrow\) IV, D \(\rightarrow\) II
• D. A \(\rightarrow\) IV, B \(\rightarrow\) II, C \(\rightarrow\) I, D \(\rightarrow\) III

Answer 1

The Correct Option is B

Step 1: Understanding the Question:
The question asks to match amino acids with the chemical tests that identify their specific functional groups in the side chain.
Step 2: Detailed Explanation:
- Glutamine: It contains an amide group (\(-CONH_2\)) in its side chain. Amides undergo the Hoffmann Bromamide degradation reaction. (A-IV)
- Lysine: It contains a primary aliphatic amine group (\(-NH_2\)) in its side chain. Primary amines give a positive Hinsberg test (solubility in alkali after reaction with benzenesulfonyl chloride). (B-I)
- Tyrosine: It contains a phenolic hydroxyl group (\(-OH\)) in its side chain. Phenols react with neutral \(FeCl_3\) to give characteristic colored complexes. (C-II)
- Serine: It contains an alcoholic hydroxyl group (\(-OH\)) in its side chain. Alcohols give a positive Cerric Ammonium Nitrate test (red color). (D-III)
Step 3: Final Answer:
The correct match is A-IV, B-I, C-II, D-III, which corresponds to option (2).