AP BIOLOGY

Detailed explanation-1: -Glycolysis produces only two net molecules of ATP per 1 molecule of glucose. However, in cells lacking mitochondria and/or adequate oxygen supply, glycolysis is the sole process by which such cells can produce ATP from glucose.

Detailed explanation-2: -Although four ATP molecules are produced in the second half, the net gain of glycolysis is only two ATP because two ATP molecules are used in the first half of glycolysis.

Detailed explanation-3: -Glycolysis is a linear metabolic pathway of enzyme-catalyzed reactions that convert glucose into two molecules of pyruvate in the presence of oxygen or into two molecules of lactate in the absence of oxygen.

Detailed explanation-4: -Anaerobic Respiration In lactic fermentation, the two molecules of NADH created in glycolysis are oxidized to maintain the NAD+ reservoir. This reaction produces only two molecules of ATP per molecule of glucose.