<prompt> The following enzyme is required for the hexose monophosphate shunt pathway:Glucose-6-phosphatasePhosphorylaseAldolaseGlucose-6-phosphate dehydrogenase  <response>: Glucose-6-phosphate is oxidized by NADP dependent Glucose-6-phosphate dehydrogenase GPD. 6-phospho glucono lactone is formed.One molecule of NADPH is formed in the reaction. This is the rate-limiting step. Regulation is effected by this enzyme Reference: Vasudevan 7th ed, pg 130 