Outline the conditions that direct pyruvate toward the following:
c. Conversion to lactate
In what tissues or organisms is each pathway present?

Question

Outline the conditions that direct pyruvate toward the following:

c. Conversion to lactate

In what tissues or organisms is each pathway present?

Accepted Answer

Hey, everybody. Let's look at our next question. What are the circumstances that guide pyruvate to be transformed into ethanol? Which organisms or tissues utilize this pathway? So when we're talking about pyruvate being transformed into ethanol, we're talking about the process of alcoholic fermentation and like lactic acid fermentation. This always takes place in an anaerobic context. Since cellular respiration, aerobic respiration is so much more efficient in terms of its yield of A TP, that will always be the go to path if it's available. But when there's no oxygen or you're in an anaerobic environment, then fermentation will be used. And that purpose of course, is to regenerate, regenerate N AD plus. So glycolysis can continue since glycolysis can provide a TP. But it also makes N A DH, which in cellular respiration, that N A DH will drop off its electrons in the electron transport chain and you'll regenerate N AD plus. But if there's no oxygen available to be an electronic acceptor, then you'll build up an A DH. Now, while we connect lactic acid fermentation with tissues like muscle tissue or red blood cells. Alcoholic fermentation is something that takes place in yeast and some bacteria. And this is fairly easy to remember since we connect it with say manufacturing alcoholic drinks. So let's evaluate our answer. Choices here. Choice A says aerobic conditions. So right away, we know choice A is not going to be your answer. And choice B says anaerobic conditions. So that's correct. I'll give that a check mark. This is low glycolytic activity. So this part is going to be incorrect because it's the main reason you need to turn to this fermentation is you need to regenerate N AD plus that's being drawn on for glycolysis. So you would expect to see this pathway when there's high glycolytic activity. So that's that part makes choice b incorrect. So move on to choice C says anaerobic conditions. So that's correct, high glycolytic activity. That's correct, found in yeast and certain bacteria. So choice C has everything correct. That will be our answer just to be thorough. We'll look at choice D here and A choice D also says aerobic conditions and notice that choice D mentions bound in muscle tissues and tumor cells. So this is something that refers to lactic acid fermentation, not alcoholic fermentation. So it's the wrong location as well. So our correct answer here, talking about the circumstances in which pyruvate is transferred and transformed into ethanol is choice C anaerobic conditions, high glycolytic activity and found in yeast and certain bacteria. See you in the next video

Outline the conditions that direct pyruvate toward the following:
c. Conversion to lactate
In what tissues or organisms is each pathway present?

Verified video answer for a similar problem:

Key Concepts

Pyruvate Metabolism

Lactate Fermentation

Tissue and Organism Specificity

Outline the conditions that direct pyruvate toward the following:c. Conversion to lactateIn what tissues or organisms is each pathway present?

Verified video answer for a similar problem:

Key Concepts

Pyruvate Metabolism

Lactate Fermentation

Tissue and Organism Specificity

Outline the conditions that direct pyruvate toward the following:
c. Conversion to lactate
In what tissues or organisms is each pathway present?