AP BIOLOGY

Detailed explanation-1: -Simultaneous oxidation and phosphorylation of G3P produces 1, 3-bisphosphoglycerate (1, 3-BPG) and nicotine adenine dinucleotide (NADH). Inorganic phosphate, rather than ATP, is used in this phosphorylation step.

Detailed explanation-2: -1 G3P molecule exits the cycle and goes towards making glucose.

Detailed explanation-3: -The energy released as G3P is oxidized (causing subsequent reduction of ) is highly exergonic. This energy, sometimes referred to as the energy of oxidation, drives the addition of inorganic phosphate onto G3P, yielding the doubly-phosphorylated 1, 3-BPG.

Detailed explanation-4: -Later the only oxidation step in the entire pathway occurs. In that reaction, glyceraldehyde-3-phosphate (G3P) is oxidized and a phosphate is added, creating 1, 3-bisphosphoglycerate (1, 3 BPG). The addition of the phosphate sometimes conceals the oxidation that occurred. G3P was an aldehyde.