Question

The substrate for pentose phosphate pathway is

• A. Glucose 6-phosphate.
• B. Glucose 1-phosphate.
• C. Fructose 6-phosphate.
• D. Fructose 1-phosphate.

Answer 1

The correct option is A Glucose 6-phosphate.

Pentose Phosphate Pathway runs parallel to glycolysis and takes place in the cytoplasm. The oxidation steps, utilizing glucose-6-phosphate (G6P) as the substrate, occur at the beginning of the pathway and are the reactions that generate NADPH and also give five carbon compound for glycolysis.

So the correct option is 'Glucose 6-phosphate'.