In the first step of the TCA cycle the acetyl group of acetyl-CoA is transferred to oxaloacetate to produce citrate. Where will the carbonyl carbon of that acetyl group be after the first CO2 is expelled? Group of answer choices The first carbon of α-ketoglutarate The last carbon of α-ketoglutarate The fourth carbon of α-ketoglutarate The third carbon of α-ketoglutarate

In the first step of the TCA cycle the acetyl group of acetyl-CoA is transferred to oxaloacetate to produce citrate. Where will the carbonyl carbon of that acetyl group be after the first CO2 is expelled? Group of answer choices The first carbon of α-ketoglutarate The last carbon of α-ketoglutarate The fourth carbon of α-ketoglutarate The third carbon of α-ketoglutarate

Biochemistry

6th Edition

ISBN:9781305577206

Author:Reginald H. Garrett, Charles M. Grisham

Publisher:Reginald H. Garrett, Charles M. Grisham

Chapter19: The Tricarboxylic Acid Cycle

Section: Chapter Questions

Problem 22P: Study Figure 19.18 and decide which of the following statements is false. Pyruvate dehydrogenase is...

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The CO2 produced in one round of the citric acid cycle does not originate in the acetyl carbons that entered that round. If acetyl-CoA is labeled with 14C at its carbonyl carbon, how many rounds of the cycle are required before 14CO2 is released?
If the carbonyl carbon of acetyl-CoA were marked with 14C, where would that carbon be located within oxaloacetate after one turn of the TCA cycle?
To begin the TCA cycle, pyruvate must be converted into acetyl-Coenzyme A (acetyl-CoA) by the enzyme complex of pyruvate dehydrogenase. This complex requires 5 different coenzymes to function properly. What are they?
The same reactions that were seen in the process of converting pyruvate to acetyl-S-CoA, occur in step ____ of the citric acid cycle as ____________ is converted to _________________.
Identify the Krebs cycle enzyme that consumes a 3-carbon substrate molecule, producing a 2- carbon product molecule (attached to acetyl-CoA), along with NADH, and one molecule of CO2. succinyl CoA synthetase a-ketoglutarate dehydrogenase pyruvate dehydrogenase isocitrate dehydrogenase malate dehydrogenase
Which of the following citric acid cycle enzymes catalyzes substrate-level phosphorylation? A) isocitrate dehydrogenase B) α-ketoglutarate dehydrogenase C) succinyl CoA synthetase D) succinate dehydrogenase E) malate dehydrogenase
How similar of an effect would a mutation in pyruvate dehydrogenase have, compared to a mutation in pyruvate carboxylase that blocks its ability to be regulated by acetyl-CoA?
The citric acid cycle provides for the net synthesis of oxaloacetate from acetyl coa? What is the main role of the tca cycle krebs cycle? What causes the gradient across the thylakoid membrane?
How many cycles of "citric acid cycle" are necessary to reveal the "C" that come from acetyl-CoA that take place in the first cycle known as "CO2"?
Name one reaction of glycolysis, one anaplerotic reaction, and one reaction of TCA cycle that acetyl-COA allostericqally regulates ( and declare whether it is an activator or inhibitor.)
If we label the two carbons composing the acetyl group of acetyl-CoA with 14C, a radioactive isotope of carbon, and this labeled acetyl-CoA enters the TCA cycle, then which CO2 released by one turn of the TCA cycle will be labeled? 1) Both. 2) Only the CO2 released by the oxidation of alpha-ketoglutarate. 3) Only the CO2 released by the oxidation of isocitrate. 4) Neither.
The tricarboxylate transport system supplies cytosolic acetyl-CoA for palmitate synthesis. What percentage of the NADPH required for palmitate synthesis is thereby provided?