AP BIOLOGY

Detailed explanation-1: -Glycolysis generates 2 ATP and 2 NADH, for a total of 8 ATP molecules.

Detailed explanation-2: -The ATP yield of glycolysis is not problematic: the net yield is two ATPs per glucose converted to pyruvate.

Detailed explanation-3: -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-4: -2 molecules of ATP are utilised in the glycolysis. One molecule of ATP is utilised when glucose is converted to glucose-6-phosphate and the other is utilised when fructose-6-phosphate is converted to fructose-1, 6-bisphosphate. So, the net gain of ATP molecules during glycolysis is 2.