AP BIOLOGY

Detailed explanation-1: -Glucose is first converted to fructose-1, 6-bisphosphate in a series of steps that use up two ATP. Then, unstable fructose-1, 6-bisphosphate splits in two, forming two three-carbon molecules called DHAP and glyceraldehyde-3-phosphae.

Detailed explanation-2: -The intermediate reactions in anaerobic glycolysis involve the cleavage of fructose 1, 6-bisphosphate into two triose phosphates, which are ultimately converted to pyruvate in some ATP-yielding reactions.

Detailed explanation-3: -Fructose 1, 6 bisphosphate splits into two triose phosphates by enzyme.

Detailed explanation-4: -While ATP is required to phosphorylate fructose 6-phosphate in glycolysis, none is produced by the dephosphorylation in gluconeogenesis. The enzyme also serves as a key regulatory point, being inhibited by AMP and fructose 2, 6-bisphosphate [3, 4].

Detailed explanation-5: -Fructose-1, 6-Bisphosphatase (FBPase) FBPase is found in the cytosol. In mammalian liver, the enzyme is a homotetramer with a subunit molecular weight of 38–41 kDa, depending on the species.