Question

A molecule of acetyl-CoA enters the Krebs cycle and the cycle proceeds until oxaloacetate is formed. The result is that: A. No CO2 is produced and GDP is converted to GTP. B. Two molecules of CO2 are produced and there is net synthesis of one molecule of oxaloacetate. C. Two molecules of CO2 are formed, three molecules of NAD and one molecule of FAD are reduced, and one molecule of GDP is converted to GTP. D. Two molecules of CO2 are produced, two molecules of NAD and one molecule of FAD are reduced, and one molecule of GDP is converted to GTP. E. No net CO2 is produced, three molecules of NAD and one molecule of FAD are reduced, and one molecule of GDP is converted to GTP.

          A molecule of acetyl-CoA enters the Krebs cycle and the cycle proceeds until oxaloacetate is formed. The result is that:
A. No CO2 is produced and GDP is converted to GTP.
B. Two molecules of CO2 are produced and there is net synthesis of one molecule of oxaloacetate.
C. Two molecules of CO2 are formed, three molecules of NAD and one molecule of FAD are reduced, and one molecule of GDP is converted to GTP.
D. Two molecules of CO2 are produced, two molecules of NAD and one molecule of FAD are reduced, and one molecule of GDP is converted to GTP.
E. No net CO2 is produced, three molecules of NAD and one molecule of FAD are reduced, and one molecule of GDP is converted to GTP.

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Added by Eva P.

Chemistry: Structure and Properties

Nivaldo Tro 2nd Edition

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Solved by Expert Rabia Shuaib

12/26/2021

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It takes place in the mitochondria and involves the oxidation of acetyl-CoA to produce energy in the form of ATP (or GTP), NADH, and FADH2, while releasing CO2 as a byproduct. Show more…

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A molecule of acetyl-CoA enters the Krebs cycle and the cycle proceeds until oxaloacetate is formed. The result is that: A. No CO2 is produced and GDP is converted to GTP. B. Two molecules of CO2 are produced and there is net synthesis of one molecule of oxaloacetate. C. Two molecules of CO2 are formed, three molecules of NAD and one molecule of FAD are reduced, and one molecule of GDP is converted to GTP. D. Two molecules of CO2 are produced, two molecules of NAD and one molecule of FAD are reduced, and one molecule of GDP is converted to GTP. E. No net CO2 is produced, three molecules of NAD and one molecule of FAD are reduced, and one molecule of GDP is converted to GTP.

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Transcript

00:01 Hello everyone, so let's do this problem here, but before i get started, i recommend that you do the 10th question yourself and come back to see if you've got a red or not.

00:12 So hopefully all i've done the question yourself now is working together.

00:15 So basically what we're talking about here is a molecule of acetyoccal and then the cycle proceeds as normal just until oxoacate is formed.

00:24 So we're talking, we're specifying or focusing our attention on the step where oxoacate is formed.

00:30 So let's look at the five different statements that were provided here and see what is the result when oxalastate is formed from the carp cycle so the first statement here is talking about no carbon dioxide is produced at that step and gdp is converted into gtp well obviously right of the bad this is wrong because when oxoacate is formed two carbon dioxide molecules are produced and usually at least we're looking generally at the whole crop cycle gtp is converted into gdp.

01:02 We never see the other way because that would require the, that would require atp or energy from another source, which is not what we're trying to do.

01:13 We're trying to form energy in this step.

01:15 So a is obviously wrong.

01:19 This is not right.

01:23 And then if we look at statement b, we have two molecules of paramed oxide are produced, which is true, and there's synthesis of one molecule of oxalicate.

01:34 Well, that is not true...

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