BRAINCAKEAerobic Respiration: Summary
Having studied each stage, we can now follow a glucose molecule all the way through aerobic respiration.
Carbon: the six carbon atoms of glucose end up in carbon dioxide. None are lost in glycolysis; two leave as CO2 in the link reaction and four in the Krebs cycle (two turns). This accounts for the 6CO2 in the overall equation.
Hydrogen: hydrogen atoms are removed by dehydrogenases in glycolysis, the link reaction and the Krebs cycle, and carried by reduced NAD and reduced FAD to the electron transport chain, where they are split into protons and electrons.
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Key terms in this lesson
- nad
- A coenzyme (nicotinamide adenine dinucleotide) that acts as a hydrogen acceptor in respiration, becoming reduced when it accepts hydrogen from a substrate.
- fad
- A coenzyme (flavin adenine dinucleotide) that acts as a hydrogen acceptor at one step of the Krebs cycle, becoming reduced when it accepts hydrogen.
More in Cellular Respiration
- Lactate
- Sprint Athletes
- Anaerobic Respiration in Plants and Fungi
- Discovery of Glycolysis
- The Link Reaction
- The Krebs Cycle
- The Electron Transport Chain
- Chemiosmosis
All 20 lessons in Cellular Respiration · All Edexcel A-level Biology topics