Which of the following intermediates is a key regulator of the pentose phosphate pathway?

A 6-Phosphogluconate
B Ribulose-5-phosphate ✓
C Xylulose-5-phosphate
D Sedoheptulose-7-phosphate

Explanation

Ribulose-5-phosphate is a key intermediate in the pentose phosphate pathway, serving as a precursor for the synthesis of NADPH and pentoses.

Mnemonic

Ribulose = 'ribo' → related to ribose, a pentose sugar

Source

Harper's Illustrated Biochemistry
Carbohydrate Metabolism Biochemistry Pentose Phosphate Pathway Hard MEDICAL Confidence: medium