Cellular Respiration
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- Опубліковано 2 чер 2024
- This biology video tutorial provides a basic introduction into cellular respiration. It covers the 4 principal stages of cellular respiration such as glycolysis, pyruvate oxidation, the kreb’s cycle, and the electron transport chain. It also covers anaerobic cellular respiration such as lactic acid fermentation and ethanol fermentation. This video contains plenty of examples and practice problems.
Here is a list of topics:
0:00 - Intro to Cellular Respiration
1:10 - Intro to ATP - Adenosine Triphosphate
5:25 - The 4 Stages of Cellular Respiration
7:34 - Glycolysis
8:26 - Substrate Level Phosphorylation
9:36 - Oxidation and Reduction Reactions
12:03 - Investment and Payoff Phase of Glycolysis
13:08 - Enzymes - Kinase and Isomerase
16:44 - Pyruvate Oxidation into Acetyl-CoA
18:22 - Pyruvate Dehydrogenase Enzyme
19:53 - The Kreb’s Cycle
26:50 - The Mitochondrial Matrix and Intermembrane Space
27:45 - The Electron Transport Chain
28:32 - Ubiquinone and Cytochrome C - Mobile Electron Carriers
34:14 - ATP Synthase and Chemiosmosis
35:32 - Oxidative Phosphorylation
48:00 - Aerobic and Anaerobic Respiration
49:40 - Lactic Acid Fermentation
52:45 - Ethanol Fermentation
55:26 - Examples and Practice Problems
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1:27:07 glycolysis produces water when the enzyme enolase catalysts the reaction of glycerate 2 phosphate into P-enolpyruvate. It produces 2 waters.
Did the same mistake on my test.
Thanks for this
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1:33:24 i think that in the investment phase ,we give 2 Atp molecules per glucose molecule in order glycolysis to start...in the pay off phase is that are yield 4 atp molecules and net production is 2atp... so I think that B) is false
same
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as someone with fibro and m.e, I have joked that I dont make atp, it is now known that is actually the case. And it all kinda makes sense now, I'm severely anemic, lack the vitamins that tend to help in the process of atp, and constantly crave carbs and sugar. I hope sometime soon we learn more about the correlation. Thanks so much for the vid.
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I am confused about question 20 B, I thought the "payoff" phase was the last set of reactions that produce 4 ATP and the investment phase was the first set of reactions that yielded 2ATP molecules? Can someone explain further please??
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sir on question 20 you gave the wrong answer for B :( investment phase is -2 ATP molecules...............
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at 1:33:05 B is false
the investment phase consists of the first 5 stages, NOT the last 5
correct me if I am wrong
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I was confused with how glucose is broken down to ATP because some people just say glucose is just broken down into 2 ATP which confused me. Anyway I get it how it is through your video.
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Hi! How many ATP molecules produces from the breakdown of one molecule of pyruvate to carbon dioxide and water (the enire proton gradient of mitochondrial inner membran includes too for ATP production and ATP-synthase has 6 c-subunits).
Thank you ❤️😊
I have a question. During the pyruvate phase, when O=C=O is broken off pyruvate and becomes CO2, why is that considered pyruvate oxidation if pyruvate is losing oxygen?
I think the main reaction is pyruvate dehydrogenase, but pyruvate oxidation is a reaction under it
Can you please add the document in the description
In form of pdf
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0:07 derive e from food
0:20 formula
- releases e, exergonic
Reactants, products, e released lost as heat [thermal]; some captured as ATP
1:26 atp
- drivers ender
- ADP + Pi
- unstable phosphate bonds
2:34 q, why atp, less e loss compared to glucose
3:32 car example
- store e as atp, not release e all at once, more efficient release little at a time
5:12 atp structure
5:34 over view
- 4 stages: [1] glycolysis[cytosol] [carbohydrate break , 2 mol pyruvate], [2] pyruvate oxi [3] Krebs cycle[matrix] [e- released create nadh and fadh2] [4] ETC[inner membrane]
7:45 glycolysis,
- g;2pyruvic acid [oxidation rxn]
- 2adp -> 2atp, phosphorylation [substrate lvl]
_[oxi phos is diff and in etc]
- 2nad+ -> 2nahd [reduction]
- [oxidation vs reduction rxn] 9:55
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For Question 20 (T/F) (1:33:00): The questions is: The investment phase of Glycolysis yields 4 ATP molecules per one molecule of glucose. This question was marked as True. But I thought the investment phase of Glycolysis consumes 2ATP and the payoff phase makes 4 ATP which results in the net ATP produced being 2 ATPs. Is this a mistake? Or am I not understanding the question correctly? @theorganicchemistrytutor
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I always love your videos and they help me a lot. At about after 1:00:00, you drew the Pyruvate wrong again. That’s the only mistake I’ve ever seen you have. Thanks for the video
A carbon is also missing from the basic structure of ATP on the left
He's human, he'll make a few. All professors and every graduate student does. What's good is that you caught it.
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@42:50 If 1 molecule of NADH activates 3 complexes and therefor produces a net of 3 ATP, why does 1 molecule of NADH2 only produce 2 ATP? Yes it activating 2 complexes, each of which produce 1 ATP when activated, but there are 2 Hydrogen atoms in one molecule of NADH2, and of course 2 are lost when it is oxidized in complex 2. Why wouldn’t 1 molecule of NADH2 (emphasis on the 2 at the end) produce a net of 4 ATP? (Each Hydrogen activating 2 complexes. Therefore 4 activations in total)
Am I missing something? Thank you for your help in advance