Chapter 146 of 2363 min read

Proteins, enzymes and vitamins

Why this is asked: Denaturation destroys a protein's secondary and tertiary structure, and its biological activity, but leaves the primary structure — the peptide-bonded amino acid sequence — untouched. Fat-soluble vitamins (A, D, E, K) get stored in body fat and can reach toxic levels on overdose; water-soluble ones (B-complex, C) aren't stored and must come from the diet regularly, which is why their deficiencies (scurvy for C, beriberi for B₁) show up faster.

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Test yourself

•Match List I with List II.
List I (Name of vitamin) List II (Deficiency disease)
A. Vitamin $B_{12}$ I. Cheilosis
B. Vitamin D II. Convulsions
C. Vitamin $B_{2}$ III. Rickets
D. Vitamin $B_{6}$ IV. Pernicious anaemia
Choose the correct answer from the options given below:

List I (Name of vitamin)	List II (Deficiency disease)
A. Vitamin $B_{12}$	I. Cheilosis
B. Vitamin D	II. Convulsions
C. Vitamin $B_{2}$	III. Rickets
D. Vitamin $B_{6}$	IV. Pernicious anaemia

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