The electron transport chain 0.0 / 5 ? BiologyBiological molecules, organic chemistry and biochemistryA2/A-levelCCEA Created by: Football03Created on: 17-02-22 15:49 Where does the electron transport chain occur? In and on the inner mitochondrial membranes(Cristae) 1 of 19 What is the electron transport chain composed of? A series of different hydrogen carriers and electron carriers at all different energy levels 2 of 19 What happens as the hydrogen & their electrons pass down the carrier molecules? Energy is released which is sufficient enough to convert ADP+Pi into ATP 3 of 19 As the hydrogen and electrons move along the carriers,what happens to the carriers? They become reduced as the hydrogen or electrons are added 4 of 19 Why do the carriers then become oxidised and what are these reactions called? As the hydrogen or electrons are being removed -Redox reactions 5 of 19 How is one molecule of ATP produced? NADH2 passes the hydrogen to FAD to form FADH2 which causes an energy gap large enough for one molecule of ATP to be produced from ADP +Pi 6 of 19 What does FADH2(flavoprotein) do? Passes the hydrogen atoms onto coenzyme Q 7 of 19 Cytochromes can only carry? Electrons not hydrogen 8 of 19 What happens to the hydrogen atoms? Form hydrogen ions and electrons 9 of 19 How does the hydrogen ions move and where to? Move by diffusion to the end of the chain 10 of 19 What happens when the electrons are passed through cytochromes? 2 molecules of ATP are generated 11 of 19 What is the name of the final hydrogen acceptor at the end of the chain? Oxygen 12 of 19 Oxygen combines with hydrogen ions and electrons to form what ultimate end product? Water 13 of 19 What is the enzyme which catalysed this reaction? Cytochrome oxidase 14 of 19 How does the generation of ATP during the electron transport chain occur? Oxidative phosphorylation (as O2 is used at the end to make the water) 15 of 19 For each NADH2 formed, how many molecules of ATP are formed? 3 molecules of ATP 16 of 19 What happens if FADH is the hydrogen carrier in the electron transport chain? Enters chain at lower starting point, missing out the first molecule of ATP.Resulting in only 2 ATP molecules forming 17 of 19 How many molecules of ATP can one glucose molecule produce? 38 ATP molecules 18 of 19 What is required in electron transport chain? Oxygen(if not the carriers would remain reduced) 19 of 19
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