Krebs Cycle 0.0 / 5 ? BiologyRespirationA2/A-levelAQA Created by: Thunderbird60Created on: 18-11-20 13:04 What do 2 molecules of pyruvate form to enter the Krebs Cycle? 2 molecules of acetyl coA 1 of 7 How many enzyme controlled steps are there? 8 2 of 7 What does acetyl coA add its 2 carbons to ad what is the product? It adds the 2 carbons to oxaloacetate to form citrate 3 of 7 What is citrate converted to and how? Its isomer, isocitrate, by removing one water molecule and adding another 4 of 7 What happens to isocitrate? It is oxidised, reducing NAD and losing a molecule of CO2 5 of 7 What molecule is produced by the oxidation of isocitrate? α-ketoglutarate 6 of 7 What happens to α-ketoglutarate? Another CO2 is lost, and the resulting compound is oxidised, reducing NAD. This molecule is then attached to coenzyme A, forming succinyl CoA 7 of 7
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