Respiration of glucose, Unit 1 Module 4 (edexcel)
Gylcolysis, The link reaction, The krebs cycle and oxidative phosphorylation.
- Created by: bridiemoore96
- Created on: 15-05-14 10:06
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- Respiration of Glucose (4 stages)
- Glycolysis
- This happens in the cytoplasm of all cells. It doesn't need oxygen and can take place in aerobic and anaerobic conditions.
- A metabolic pathway where each glucose molecule is broken down to two molecules of pyruvate.
- Stage1: Phosphorylation
- Stage 2: splitting of hexose 1,6-bisphosphate.
- Stage 3: Oxidation of triose phosphate.
- Stage 4: Conversion of triose phosphate to pyruvate
- The Link Reaction.
- This happens in the matrix of the mitochondria.
- It converts pyruvate to acetate.
- 2pyruvate + 2NAD + 2CoA -> 3CO2 + 2reduced NAD+ 2acetyl CoA
- This happens in the matrix of the mitochondria.
- The Krebs cycle
- Takes place in the mitochondrial matrix.
- Oxides acetate to make carbon dioxide.NAD and FAD are reduced. ATP is made by substrate-level phosphorylation.
- Oxidative phosphorylation.
- Is the formation of ATP by adding a phosphate group to ADP, in the presence of oxygen, which is the final acceptor.
- How it happens
- 1. As protons flow through an ATP synthase enzyme, they drive a rotation of park of the enzyme and join ADP and P to for ATP.
- 2. The electrons are passed from the last electron carrier ain the chain to molecular oxygen, which is the final acceptor.
- 3. Hydrogen ions also join so that oxygen is reduced to water.
- Glycolysis
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