In which of the following is the first molecule becoming reduced ...

Question

In which of the following is the first molecule becoming reduced to the second molecule?
a. pyruvate → acetylCoA
b. pyruvate → lactate
c. glucose → pyruvate
d. NADH + H+ →NAD+ + 2H

Accepted Answer

Welcome back. Here's our next question. It says during lactic acid fermentation, the lactate is synthesized from piru bait. The other use of blank as a reducing agent when we look over our answer choices, we have a oxygen B A T P C N A D H D F A B H. Well we can if we're not totally sure right at the top of our heads what the answer is. Um we can actually eliminate two of these right away. Um Choice a oxygen oxygen will not be a reducing agent. It's a powerful oxidizing agent. That's where the very name oxidizing came from. So Choice A. We can cross off right away and then Choice B A T P. It's role usually of course, is to generate to provide energy for the various pathways. So we're going to eliminate that as well. So we're down to N A D H and F A D H. Well, these both are reducing agents but F A D h is not used in lactic acid fermentation. So the correct answer is N A D H. And the purpose of it is to regenerate the N A. D plus that's necessary for glycol icis. And in the presence of oxygen, the N A D H will be reduced by oxidative phosphor relation when it donates its electrons to the electron transport chain. So in that case the process of oxidative phosphor relation as well as providing that A T P. Is going to provide the N A. D. P plus needed for glycol ISIS, it will regenerate it. So the lactic acid fermentation process evolved as an alternate pathway when oxygen's fly cannot keep up and it uses n a t. H as a reducing agent to reduce piru bait and synthesize lactate. So it's an alternate pathway to provide to regenerate the n a. D. P. Plus necessary for glycol icis. So during lactic acid fermentation, the lactate is synthesized from piru bait via the use of choice C. And A. D. H. As a reducing agent. See you in the next video.

In which of the following is the first molecule becoming reduced to the second molecule? a. pyruvate → acetylCoA b. pyruvate → lactate c. glucose → pyruvate d. NADH + H+ →NAD+ + 2H

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