Problem 3

Background and context

Option (a) is correct as in the energy investment phase of glycolysis, glucose and fructose are phosphorylated which uses 2ATP molecules to do so. 

Option (b) is incorrect as NADH is formed which further helps in oxidation.

Option (c) is incorrect as ATP which is used for energy, is formed when a phosphate group is detached and ADP is produced.

Option (d) is incorrect as NAD+ helps to pass energy from glucose to other pathways and it is reduced to form NADH + H+.