Which of the following tests cannot be used for identifying amino acids?
Biomolecules · Class 12 · JEE Main Previous Year Question
Which of the following tests cannot be used for identifying amino acids?
- a
Biuret test
- b✓
Barfoed test
- c
Ninhydrin test
- d
Xanthoproteic test
Barfoed test
Step 1: Reviewing Common Tests — Ninhydrin and Biuret are standard tests for amino acids/proteins. Xanthoproteic identifies aromatic amino acids.
Step 2: Carbohydrate Testing — is specifically designed to distinguish between monosaccharides and disaccharides.
Step 3: Selection — Since is exclusive to sugars, it cannot be used to identify amino acids. Correct option is (b).
Key Point: The requires at least two peptide bonds (tripeptides and larger).
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