The ring structure of glucose is due to the formation of a hemiacetal and ring formation between:
Correct answer: A. C1 and C5
- A. C1 and C5
- B. C1 and C4
- C. C1 and C3
- D. C2 and C5
Explanation
The cyclic form of glucose is created through an intramolecular reaction. The hydroxyl group on carbon-5 acts as a nucleophile, attacking the carbonyl carbon of the aldehyde group at carbon- 1, forming a stable six-membered hemiacetal ring.
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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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