Cellular Respiration — every step, every product
VCE Biology · Cellular respiration · 10 flashcards, free to study.
Maps glycolysis → link → Krebs → ETC with exact inputs, outputs and ATP yields. Built off the Unit 3 AOS 2 key knowledge.
- Net ATP yield from glycolysis (substrate-level)
- 2 ATP — 4 produced, 2 consumed in the prep phase.
- Where does the Krebs cycle occur?
- Mitochondrial matrix.
- Inputs and outputs of glycolysis
- In: 1 glucose, 2 ATP, 2 NAD+. Out: 2 pyruvate, 4 ATP (net 2), 2 NADH.
- Role of NADH and FADH₂
- Electron carriers — donate electrons to the ETC to drive H+ pumping and ATP synthesis.
- Where is most ATP produced?
- Oxidative phosphorylation (ETC + chemiosmosis) — ~26–28 of the ~30–32 total ATP.
- Final electron acceptor in aerobic respiration
- Oxygen — combines with H+ to form water.
- What does anaerobic respiration in animal cells produce?
- Lactic acid + 2 ATP (per glucose).
- Why is anaerobic respiration less efficient?
- No ETC is used — only 2 ATP per glucose vs ~30 aerobically.
- Link reaction (pyruvate oxidation) — where & products?
- Mitochondrial matrix. Pyruvate → acetyl-CoA + CO₂ + NADH.
- Total CO₂ produced per glucose (aerobic)
- 6 CO₂ — 2 from link reaction, 4 from Krebs.