MCAT Organic Chemistry Question — Carbohydrates
- Feb 05, 2017
- MCAT Question of the Day
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Choice C (below) is the only molecule with the hydroxyl and hydroxymethyl group on the same side of the ring.
Thus, choice C, which is β-glucose, is the correct answer. The carbohydrates shown in A, B, and D are α-galactose, α-mannose, and α-glucose, respectively. As you can see from those answer choices, the OH attached to the anomeric carbon and the CH2OH are on opposite sides of the ring.
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