Electron Transport chain?

Here is our assignmen for a upcoming quiz. Know where electrons come from and go to. Know the net effect to pay for cost of making ATP.


My chart


All electrons coming from NADH enter at complex one but the one exception that skips and enters at Q.





Electrons from FADH2 enter at Q and come from succinate B-Ox. ?





Keep track of how many protons get pumped per electron:


Complex I 2 electrons yield 4 protons - Q cycle


Complex II No electron pumping


Complex III 2 electrons yield 4 protons - Q cycle


Complex IV 1 electron yields 2 protons - Unknown mode not Q





Is this correct?


According to wiki it says "Complex IV (cytochrome c oxidase; EC 1.9.3.1) removes FOUR electrons from four molecules of cytochrome c and transfers them to molecular oxygen (O2), producing two molecules of water (H2O). At the same time, it moves FOUR protons across the membrane, producing a proton gradient."





Are the Four electrons from complex 1 and 3?

Electron Transport chain?
i supposed you were talking about ElectronTransportChain in aerobic respiration then since you are using NADH and FADH2 instead of NADPH in photosynthesis.





You're delving into a very complicated territory just for a quiz.


I can help out by showing my simplified learning and you use it to reinforce what you have gathered?





Know where electrons come from and go to


- the electrons come from glycolysis, link reaction and krebs cycle


-for glycolysis, after the fructose,1, 6-phosphate lysis and formation of glyceraldehyde 3-phosphate, dehydrogenation takes place and 2 NADH are the electron carriers


-for link reaction, pyruvate undergoes oxidative decarboxylation to form acetyl coA. As oxidation implies, electrons are removed by 2 NADH


-Krebs cycle is where oxidative dehydrogenation produces 6 NADH and 2 FADH2





Electrons from NADH and FADH2 is removed during oxidative phosphorylation and transported down ETC to ATP synthetase where they are eventually removed by oxygen and electrons going into water.





Net cost for ATP production is 2 ATP where phosphorlyation of glucose is required in the beginnning to energise it