Glycolysis, Krebs cycle, ETS, fermentation, ATP yield.
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Q1 · Respiration and Energy Transfer (Class 11 — ~20% weight) · EASY
During aerobic respiration, glycolysis occurs in the cytoplasm and produces pyruvic acid. How many molecules of ATP are produced per glucose molecule during glycolysis (net gain)?
Q2 · Respiration and Energy Transfer (Class 11 — ~20% weight) · MEDIUM
In the Krebs cycle (citric acid cycle), acetyl CoA combines with oxaloacetic acid to form citric acid. How many molecules of NADH are produced per acetyl CoA molecule that enters one complete turn of the Krebs cycle?
Q3 · Respiration and Energy Transfer (Class 11 — ~20% weight) · HARD
During complete aerobic oxidation of one glucose molecule, the theoretical maximum number of ATP molecules produced through oxidative phosphorylation in the electron transport system (ETS) is calculated based on NADH and FADH2 yields. If one NADH produces 3 ATP and one FADH2 produces 2 ATP through ETS, what is the total ATP yield from ETS when one glucose molecule is completely oxidized (excluding substrate-level phosphorylation)?