Biology A-Level
Krebs cycle
What Krebs cycle means in Biology A-Level, as defined for AQA.
Definition of Krebs cycle
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Reference: AQA
Acetylcoenzyme A reacts with a four-carbon molecule, releasing coenzyme A and producing a six-carbon molecule that enters a series of oxidation-reduction reactions generating reduced coenzymes and ATP by substrate-level phosphorylation, with carbon dioxide lost.
Topics that use Krebs cycle
- Respiration (A-level only) (AQA A-Level)
Related terms
- active transport
- anaerobic stage
- ATP hydrolase
- continuation of glycolysis
- ethanol and carbon dioxide
- limited NAD pool
- link reaction
- Mitochondrial matrix
Using Krebs cycle in the exam
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