Q. Which one of the following does not exhibit the phenomenon of mutarotation?

A) (–) Fructose
B) (+) Sucrose
C) (+) Lactose
D) (+) Maltose
Explanation

[Solution from source] Mutarotation needs a free hemiacetal/hemiketal group that can open and re-close. In sucrose the anomeric carbons of glucose and fructose are joined in the glycosidic bond, so sucrose is non-reducing and shows no mutarotation. Fructose, lactose and maltose have a free anomeric carbon. Answer (2).

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.

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