Seliwanoff test and Xanthoproteic test are used for the identification of ____ and ____ respectively.
Biomolecules · Class 12 · JEE Main Previous Year Question
Seliwanoff test and Xanthoproteic test are used for the identification of ____ and ____ respectively.
- a
Aldoses, ketoses
- b
Ketoses, aldoses
- c
Proteins, ketoses
- d✓
Ketoses, proteins
Ketoses, proteins
Step 1: Analyzing Seliwanoff Test — This biochemical test uses resorcinol and . It reacts much faster with ketoses (like fructose) than aldoses, distinguishing between them.
Step 2: Analyzing Xanthoproteic Test — This test uses concentrated to detect proteins containing aromatic side chains (tyrosine, tryptophan), which form yellow nitro derivatives.
Step 3: Summary — Therefore, and tests identify ketoses and proteins respectively. Correct option is (d).
Remember: A positive Xanthoproteic test is the reason why skin turns yellow upon contact with nitric acid.
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