The enzyme phosphopentose isomerase is characterized by all the following except
A) it catalyzes the interconversion of ribose-5-phosphate and ribulose-5-phosphate
B) there is no requirement for ATP
C) it converts a ketose to an aldose
D) it catalyzes an inversion of configuration at carbon-3

Question

Quizplus · Accepted Answer

Phosphopentose isomerase, also known as ribose-5-phosphate isomerase, catalyzes the conversion between ribose-5-phosphate (an aldose) and ribulose-5-phosphate (a ketose), without the need for ATP. This reaction involves the interconversion of a ketose and an aldose, but it does not involve an inversion of configuration at carbon-3. The inversion of configuration at a specific carbon atom is not a characteristic of this enzyme's action.

The Enzyme Phosphopentose Isomerase Is Characterized by All the Following