1. All of the following statements about pyruvate dehydrogenase are true EXCEPT: It converts pyruvate to acetyl-CoA. It is very closely related to alpha-ketoglurarate dehydrogenase. It uses three different cofactors. All of these are true. It produces NADH.

1. All of the following statements about pyruvate dehydrogenase are true EXCEPT: It converts pyruvate to acetyl-CoA. It is very closely related to alpha-ketoglurarate dehydrogenase. It uses three different cofactors. All of these are true. It produces NADH.

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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Question

1. All of the following statements about pyruvate dehydrogenase are true EXCEPT:

It converts pyruvate to acetyl-CoA.

It is very closely related to alpha-ketoglurarate dehydrogenase.

It uses three different cofactors.

All of these are true.

It produces NADH.

2. Which statement about lactate is TRUE?

It is produced when NADH levels are low.

It is produced when oxygen levels are high.

It is produced when ATP levels are high.

It is produced when glyceraldehyde-3-phosphate levels are high.

It is produced when NAD+ levels are high.

3. In the Krebs cycle, the energy released by taking a compound off Coenzyme A is used to:

isomerize citrate

decarboxylate isocitrate

oxidize carbon

make a new carbon-carbon bond.

reduce carbon

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