A water-soluble vitamin containing both nitrogen and sulphur is:
Correct answer: B. Vitamin B1
- A. Vitamin E
- B. Vitamin B1
- C. Vitamin K
- D. Vitamin D
Explanation
Vitamin B1 is also known as thiamine. Its chemical structure contains both a pyrimidine ring (with nitrogen) and a thiazole ring (with nitrogen and sulphur), making it a nitrogen and sulphur-containing vitamin.
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About Macromolecules
Proteins are classified by shape, composition and structure, from primary amino acid sequence to secondary, tertiary and quaternary organisation, and their biological roles are linked to this structure. Enzymes are examined as protein biocatalysts, including active sites, substrate specificity, activation energy, cofactors and factors affecting activity.
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