Glycolysis occurs in the cytosol and produces a small amount of ATP without directly using oxygen.
Slides 3–4No-signup product demo
Try the study workflow before uploading anything
Explore one fixed biology notebook across the same connected outputs students need for an exam. Nothing is uploaded, generated or stored.
Fixed sample · no live AI
Cellular respiration — Lecture 4
3 trusted course sources
Source-grounded summary
A short map before detailed revision:
Pyruvate oxidation and the citric-acid cycle supply NADH and FADH₂ to the electron transport chain.
Slides 5–6Oxygen accepts electrons at the end of the chain, allowing the proton gradient and ATP synthase to keep operating.
Audio 12:40When oxygen is unavailable, fermentation regenerates NAD⁺ but yields far less ATP per glucose.
Notes p. 4