Question

In which of the following reactions of glycolysis, a molecule of water is removed from the substrate?

• A. Glucose $\to$ Glucose-6-phosphate
• B. Fructose-6-phosphate $\to$ Fructose-1,6 bisphosphate
• C. 2-phosphoglycerate $\to$ Phosphoenol pyruvate
• D. Phosphoenol pyruvate $\to$ Pyruvate

Answer 1

The correct option is C 2-phosphoglycerate $\to$ Phosphoenol pyruvate

Options A and B represent the addition of phosphate group to glucose and fructose 6 phosphates respectively. Option D represents dephosphorylation of phosphoenolpyruvate into pyruvate. Dehydration of 2-phosphoglycerate to phosphoenolpyruvate includes reversible removal of a molecule of water from 2-phosphoglycerate.

So, the correct answer is option C.