Question

Furanose ring of fructose is formed due to reaction between :

• A. C1 and C4
• B. C2 and C5
• C. C1 and C5
• D. C2 and C4

Hint:

In sugars, furanose rings are five-membered rings, formed when the hydroxyl group on C5 reacts with the carbonyl group on C1.

Answer 1

The Correct Option is C

In the furanose form of fructose, the aldehyde group at C1 reacts with the hydroxyl group at C5, forming a five-membered ring. This reaction is a typical example of cyclic hemiacetal formation, resulting in the furanose form of fructose.