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NEET CHEMISTRYBiomoleculesEasy

Question

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

A

(+)-Sucrose

B

(+)-Lactose

C

(+)-Maltose

D

(-)-Fructose

Step-by-Step Solution

Mutarotation is the spontaneous change in the specific rotation of an optically active compound when dissolved in water, due to the equilibrium between its α\alpha and β\beta anomeric forms. It is a characteristic property of reducing sugars. Sucrose is a non-reducing sugar because the glycosidic bond is formed between the anomeric carbon of α\alpha-D-glucose (C1) and the anomeric carbon of β\beta-D-fructose (C2). Since it does not have a free anomeric hemiacetal or hemiketal hydroxyl group, it cannot undergo ring opening in solution and thus does not exhibit mutarotation.

Exam Context & Concepts Covered

This question aligns with the NEET CHEMISTRY syllabus, specifically targeting concepts from Biomolecules. Mastering this topic is crucial for scoring well in the upcoming medical entrance examinations. Solving conceptually related problems will help you understand the nuances of these concepts and improve your problem-solving speed.

CHEMISTRYBiomoleculesfollowingexhibitphenomenonmutarotation

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