The True Reason Why We Breath Oxygen - The Electron Transport Chain

00:05 - Significance
00:35 - Glycolysis (Step 1) Review
01:06 - Pyruvate oxidation/Krebs Cycle (Step 2/3) Review
02:02 - Beginning of Electron Transport Chain
02:14 - Importance of Oxygen
03:22 - 6 Enzymes of the chain
03:53 - Creation of the H ion gradient
05:14 - Complex I and the powering of pumps
07:51 - Ubiquinone and complex III
08:20 - Cyt C and Complex IV
09:00 - Complex II and FADH
09:55- Diagram and overview of the chain
10:55- ATP Synthase
12:54- F1 complex and ATP Synthesis
14:59 - Final Products

The electron transport chain is the 4th and final pathway of aerobic respiration. Energy stored in the excited state electrons of NADH and FADH2 is used to pump hydrogen ions from the mitochondrial matrix to the intermembrane space creating a concentration gradient across the inner membrane of the mitochondria. This gradient powers the mechanical rotor of ATP Synthase which drives the synthesis of ATP. The electron transport chain is one of the most essential pathways to understand when beginning biology. Without this vital pathway, life would have never passed the single cellular stage. I encourage new learner's to watch the entire aerobic respiration pathway which, in addition to the ET chain, includes glycolysis, pyruvate oxidation, and the citric acid cycle. This concept may be one of the hardest to grasp at the beginner level. If you have any questions please do not hesitate to ask in the comments.

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[alzalz]

EXCELLENT THIS SHOULD HAVE MILLIONS OF VIEWS.

[clavnico]

Hey! Sorry for the delay

This is one of my favorite video of yours! great work! The subject is very complex but you do a great job at explaining the mechanism ^^ (i have no background in biochemistry).


The rotor mechanism of ATP synthase is soooo ! thanks for teaching me this :D.
Also you said the rotor used mechanical force? Not electomagnetic force? how is it possible with molecules?


Also it would have been nice to show the different atom the electron passe through in order to show the gradually increasing electron affinity. because since you showed fluor and oxygen as an exemple I thought fluor was the cofactor in complex 1 so i couldn't understand how the electron was then going to oxygen with less electron affinity.


I also noticed all the reactions take place on the inner membrane. is that why this membrane is so much folded? to increase the area for the reaction?

[ayesha-hqvs]

Wait....The weird thing is that we always say oxygen is need to burn glucose to form ATP but what i come to know is that oxygen is only need to accept those electron to form water...secondly i dont see any oxygen in entire process in which glucose is finally converted into 38 ATP....Kindly need clarification on this.Thanks