COMEDK2023Evening ShiftChemistryBiomoleculesActual
Structures of 3 Monosaccharides are given below. Two of them are Anomers. Identify the two Anomers.
Options
- AII is the anomer of both I and II
- BII and III are Anomers.
- CI and II are Anomers.
- DI and III are Anomers
Correct answer
D. I and III are Anomers
Step-by-step solution
Anomers are a specific type of epimers that differ in configuration only at the anomeric carbon (the hemiacetal or hemiketal carbon). In the given Fischer projections of cyclic monosaccharides, the anomeric carbon is the one attached to the ring oxygen and the hydroxyl group. By examining the structures, we observe that structure [I] and structure [III] have the same configuration at all chiral centers except for the anomeric carbon. Specifically, in structure [I], the hydroxyl group at the anomeric position is on