?-glucose is present in potatoes and ?-glucose is present in wood. Both are glucose molecules but one can be used by humans to synthesize ATP and one cannot. Based on this information, what is the best explanation on why humans can only digest one of the glucose types?
A. Only ?-glucose can form polysaccharides.
B. ?-glucose is C6H12O6 and ?-glucose is C5H12O6.
C. ?-glucose is a chain and ?-glucose is a ring.
D. ?-glucose and ?-glucose are stereoisomers with OH groups oriented differently.
Answer: D
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