BIO NMDCAT Carbohydrates

nmdcat.online June 27, 2026

Regarding the stereoisomerism of glucose, D-glucose and L-glucose are classified as enantiomers because they are

A. Mirror images of each other around all chiral centers

✓

B. Identical in all physical and chemical properties

C. Structural isomers with different functional groups

D. Diastereomers that differ at only one chiral carbon

📝 Explanation

Enantiomers are a pair of molecules that are non-superimposable mirror images of each other. D-glucose and L-glucose are mirror images at all four chiral centers (C2, C3, C4, and C5), making them enantiomers. Diastereomers differ at one or more, but not all, chiral centers.

📖 Additional Information

Mirror images of each other around all chiral centers
Identical in all physical and chemical properties
Structural isomers with different functional groups
Diastereomers that differ at only one chiral carbon

Enantiomers are a pair of molecules that are non-superimposable mirror images of each other. D-glucose and L-glucose are mirror images at all four chiral centers (C2, C3, C4, and C5), making them enantiomers. Diastereomers differ at one or more, but not all, chiral centers.

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