Which reaction does the enzyme phosphoglucose isomerase catalyze?

(a) glucose -> glucose 6-phosphate
(b) fructose 6-phosphate -> fructose 1,6-bisphosphate
(c) glucose 6-phosphate -> fructose 6-phosphate
(d) glucose -> glucose 1-phosphate


Choice (c) is the correct answer. The isomerase part of the enzyme name indicates that it catalyzes an isomerization reaction, and the phosphoglucose part of the name indicates the type of substrate used. The enzymes that catalyzed reactions (a), (b), and (d) would be called kinases, because they transfer phosphate groups from one molecule to another.

Biology & Microbiology

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