What two cellular respiration reactions follow glycolysis?

Answer 1

. Glucose is converted to two molecules of the three-carbon compound glyceraldehyde-3-phosphate (G3P), with the expenditure of ATP. 2. ATP is generated from the conversion of G3P to pyruvate. The 10 reactions of glycolysis proceed in four stages. Stage A: Three reactions change glucose into a compound that can readily be cleaved into three-carbon phosphorylatied units. Two of these reactions require the cleavage of an ATP molecule, so that this stage, glucose priming, requires the investment by the cell of two ATP molecules. Stage B: The second stage is cleavage and rearrangement, in which the six-carbon product of the first stage is split into two three-carbon molecules. One is G3P, and the other is converted to G3P by another reaction. Stage C: The third stage is oxidation, in which a pair of electrons is removed from G3P and donated to NAD+. NAD+ is a coenzyme that acts as an electron carrier in the cell, in this case accepting the two electrons from G3P to form NADH. Note that NAD+ is an ion, and that both electrons in the new covalent bond come from G3P. Stage D: The final stage, ATP generation, is composed of a series of four reactions that convert G3P into another three-carbon molecule, pyruvate, and in the process generate two ATP molecules. The glycolytic reaction sequence generates a small amount of ATP by reshuffling the bonds of glucose molecules. Glycolysis is a very inefficient process, capturing only about 2 % of the available chemical energy of glucose. Most of the remaining energy is unrecovered in the molecules that glycolysis procures, particularly pyruvate.