Apedia

A-Level Biology OCR A

Glycolysis Continues Anaerobic Krebs Cycle Electrons Stops Regenerated

In anaerobic respiration, glycolysis continues because fermentation regenerates NAD; the link reaction, Krebs cycle, and oxidative phosphorylation halt due to the lack of oxygen as the final electron acceptor and the inability to oxidize NADH and FADH2.

In anaerobic respiration, glycolysis continues because fermentation regenerates NAD; the link reaction, Krebs cycle, and oxidative phosphorylation halt due to the lack of oxygen as the final electron acceptor and the inability to oxidize NADH and FADH2.

Front Explain why glycolysis is the process that continues in anaerobic respiration whereas the link reaction, Krebs cycle and oxidative phosphorylation all stop.
Back Why glycolysis continues in anaerobic respiration:
  • No oxygen as final electron acceptor - flow of electrons stops - ATP synthesis by chemiosmosis stops
  • NADH and FADH2 no longer able to be oxidised - nowhere for electrons to go - cannot be regenerated
  • Krebs cycle comes to a halt bc cannot decacrboxylate and oxidise pyruvate
  • Glycolysis does not come to a halt because NAD is regenerated through fermentation

Learn with these flashcards. Click next, previous, or up to navigate to more flashcards for this subject.

Next card: Regeneration nad explain crucial part form fermentation nadh

Previous card: Yield atp aerobic explain anaerobic respiration lower organic

Up to card list: A-Level Biology OCR A