In glycolytic pathway which of the following steps shows reduction of co-enzyme

Options

A. 1, 3-diphosphoglycerate to 3-phosphoglycerate
B. Glucose 6-phosphate to fructose 6-phosphate
C. Glyceraldehyde 3-phosphate to 1,3 diphosphoglycerate
D. 3-phosphoglycerate to 2-phosphoglycerate

Answer

C

Explanation

Glyceraldehydes 3 Phosphate or 3 Phospho glyceraldehydes is converted into 1, 3 bisphosphoglycerate. During this conversion NAD + is converted to `NADH+ H^(+)` i.e. two redox equivalent are removed from PGAL and transferred to a molecule of `NAD^(+)` . PGAL is oxidize and with inorganic phosphate to get converted into bis phosphoglyceraldehyde by diphosphoglyceraldehyde dehydrogenase.