G Which reaction requires the ATP? fructose 6‑phosphate ⟶ fructose 1,6‑bisphosphate sedoheptulose 7‑phosphate + glyceraldehyde 3‑phosphate ⟶ xyulose 5‑phosphate + ribose 5‑phosphate glucose 6‑phosphate ⟶ fructose 6‑phosphate fructose 1,6‑bisphosphate ⟶ glyceraldehyde 3‑phosphate fructose 6‑phosphate + erythrose 4‑phosphate ⟶ sedoheptulose 7‑phosphate + glyceraldehyde 3‑phosphate fructose 6‑phosphate + glyceraldehyde 3‑phosphate ⟶ xyulose 5‑phosphate + erythrose 4‑phosphate

6‑phosphate ⟶ fructose 6‑phosphate fructose 1,6‑bisphosphate ⟶ glyceraldehyde 3‑phosphate.

Explanation:

Glucose is a high  energy rich  stable compound, which does not react easily.Therefore inorder to extract the energy in its glycosidic bonds, so that subsequent reaction in the glycolytic pathways can be easier. One molecule of glucose must be phosphorylated by 2 molecules of ATPs..

The first step involves the  formation of glucose phosphate(6-phosphate), which is converted to fructose 6 phosphate by hydrolysis of 1 ATP molecule.

The later is later converted , in presence of  hydrolysis of the  second ATP  to form fructose 1, 6 bisphosphate. These two steps are called phosphorylation.

The latter is converted to 2 molecules of  3C compounds called glyceraldehyde -3-phosphate  or triose phosphate.

From the point onward the  reaction steps are faster to produce ATPs and Pyruvate. 4ATPs are formed, but the 2ATPs used above are deducted. so net 2ATPs formed.