7 the net gain of atp by glycolysis is a 4 atpglucose...

7) The net gain of ATP by glycolysis is: A) 4 ATP/Glucose molecule. B) 2 ATP/Glucose molecule C) 34 ATP/Glucose molecule. D) only GTP is produced in glycolysis. 8) Fermentation in Yeast and Muscle cells: A) always produce alcohol B) recycle NADH to in order glycolysis proceed when oxygen is low. C) always produce lactic acid and carbon dioxide. D) recycle NAD+ in order glycolysis proceed when oxygen is low. 9) Where is Pyruvate converted into Acetyl CoA? A) in glycolysis. B) in the electron transport chain. C) in the citric acid cycle. D) in the pyruvate dehydrogenase complex. 10) This is the initial reactant and final product in the Citric Acid Cycle. A) Oxaloacetate B) Citrate C) Pyruvate D) Glucose 11) Which pathway is found in the cytoplasm of cells? A) The Citric Acid Cycle B) The Pyruvate Dehydrogenase Complex. C) Glycolysis D) The electron Transport Chain.

Transcript

00:01 Okay, i'm going to answer this question.

00:02 Let's talk about glycolysis.

00:04 Remember that glycolysis is going to start with a glucose molecule, and it is going to be broken down into two pyrobin molecules, and also atp and energy intermediate.

00:15 For example, here you are going to use 2 atp's, and here, the second part of glycolysis, you're going to produce 2 atp per side.

00:27 Okay? so you have minus 280ps here plus 480ps.

00:33 So you have a total net production of atp of plus 280ps.

00:39 Also remember that here, also here you're going to produce one n .a .h molecule.

00:46 So you have a total production of 2nedh molecules too.

00:50 So question number 1 says the net gain of atp by glycolysis is, and the answer is going to be option b that says 280p per glucose molecule, okay, because you have a net production of 2 .8.

01:02 Now let's hope for the next question, that is question 8.

01:04 That says fermentation in gis and muscle cells.

01:09 So, remember the fermentation, or normally in aerobic conditions, pyruvate is going to enter mitochondrial in order to continue the presence of aerobic separation.

01:18 But when oxygen is not available, all of this is going to be blocked, and pyrobat is going to shunt to the lactic acid fermentation, in case of muscle cells, for example, okay? it is going to be converted to lactic acid.

01:29 And why is this important? well, this is important because, you remember that here, going to produce you're going to reduce one nad plus molecule in order to produce an ada and this nadh is necessary or has to be oxidized back to an ad plus in the electrical transport chain that is found in mitochondrondrom but mitochondromb is not working so this is going to remain like this like an adhd and you need an ad plus in order for glycolysis to keep running so now as the electric transport chain is is blocked and then the only way by which this nadh is going to be converted back to an ad plus is by this reaction from pyrobed to lactic acid.

02:09 Okay, so you're going to have more nab plus, then glycolysis is going to continue happening.

02:14 Okay, okay? so, it's a fermentation in yeast muscle cells.

02:20 Option a says always produce alcohol, and this is false because, for example, in case of skeletal muscle, you're going to produce lactic acid.

02:29 Option b is recycled nadh 2 in order glycolysis proceed when oxygen is low.

02:35 And this is false because you are recycling this nad plus.

02:38 Okay, i mean you're converting an adh to an ad plus.

02:42 So this is like recycling your nadh, particularly.

02:46 You're an ad plus.

02:47 But this is like the, like how it is.

02:52 Or actually this option b is true, okay? because you're practically recycling this nadh back to an ad plus.

02:59 Practically recycling an adh is talking about this process here, like from an adh to an ad plus...

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