Link Reaction and Krebs Cycle 0.0 / 5 ? BiologyMetabolismInternational BaccalaureateOther Created by: Lotto65Created on: 18-03-17 11:46 What is required for pyruvate to be oxidised further? The release of more energy from it if oxygen is available 1 of 31 What does pyruvate become if it is not oxidised? Ethanol and carbon dioxide (yeast) or lactate (humans) 2 of 31 What does pyruvate become if it can be oxidised? Carbon dioxide and water 3 of 31 Where does oxidation of pyruvate take place? Mitochondria 4 of 31 What is the first stage of pyruvate oxidation called? Link reaction 5 of 31 Where does the Krebs Cycle take place? In the matrix of the mitochondrion 6 of 31 What helps the Krebs cycle to take place? Enzymes in the matrix of the mitochondrion 7 of 31 How does pyruvate get into the mitochondrion? The mitochondrion absorbs it 8 of 31 What do enzymes do to the pyruvate in the mitochondrion? Remove carbon dioxide and hydrogen 9 of 31 How is the hydrogen properly removed? NAD electron carrier accepts it 10 of 31 What is the name of the process of removing carbon dioxide? Decarboxylation 11 of 31 What is the name of the process to remove both hydrogen and carbon dioxide from pyruvate? Oxidative decarboxylation 12 of 31 What is the product of removing hydrogen and carbon dioxide from pyruvate? An acetyl group 13 of 31 What is attached to the acetyl group in the link reaction? Coenzyme A 14 of 31 What is the name of the product once coenzyme A has been added to the acetyl group? Acetyl coenzyme A 15 of 31 What is the first reaction of the Krebs cycle? Acetyl CoA has the CoA removed and is transferred into a four carbon compound 16 of 31 What is the name of the four carbon compound formed in the first reaction of the Krebs cycle? Oxaloacetate 17 of 31 What is the six carbon compound that oxaloacetate is formed into? Citrate 18 of 31 The carbon dioxide produced from decarboxylations, is that a waste product? Yes and is excreted 19 of 31 Hydrogen removal is also known as... Oxidation 20 of 31 Which electron carrier accepts hydrogen in the last reaction of the Krebs cycle? FAD 21 of 31 What do oxidation reactions release? Energy 22 of 31 Where is the energy produced by oxidation stored? In the electron carriers 23 of 31 When is this energy stored by electron carriers released? In the electron transport chain 24 of 31 What is the energy stored by electron carriers used to make? ATP 25 of 31 What is the name of the reaction in the Krebs cycle that produces ATP? Substrate-level phosphorylation 26 of 31 How many hydrogens are removed from pyruvate in the link reaction? 2 27 of 31 More specifically, what is energy released in oxidations used to do? Reduce hydrogen carriers 28 of 31 How many molecules of ATP are produced in the Krebs Cycle? One 29 of 31 Where is energy released from oxidation carried to by electron carriers? Cristae of mitochondria (the electron carriers are produced from this energy) 30 of 31 Why is it called oxidative phosphorylation? ADP is phosphorylated to produce ATP using energy released by oxidation 31 of 31
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