Question 1

Use the following to answer questions
Choose the correct answer from the list below. Not all of the answers will be used.
-The substance ____________ is a competitive inhibitor of succinate dehydrogenase.
A)cytosol
B)isocitrate dehydrogenase
C)anaplerotic
D)harvest
E)cis-aconitate
F)melonate
G)metabolon
H)oxaloacetate
I)inner membrane
J)citrate
K)carbon dioxide
L)glyoxylate cycle
M)malate dehydrogenase

Accepted Answer

Melonate is a competitive inhibitor of succinate dehydrogenase.

Question 2

_______________ is the first citric acid cycle intermediate to be oxidized.

Accepted Answer

Isocitrate

Question 3

Use the following to answer questions
Choose the correct answer from the list below. Not all of the answers will be used.
-The function of the citric acid cycle is to ____________ high-energy electrons.
A)cytosol
B)isocitrate dehydrogenase
C)anaplerotic
D)harvest
E)cis-aconitate
F)melonate
G)metabolon
H)oxaloacetate
I)inner membrane
J)citrate
K)carbon dioxide
L)glyoxylate cycle
M)malate dehydrogenase

Accepted Answer

The function of the citric acid cycle is to harvest high-energy electrons.

Question 4

Use the following to answer questions
Choose the correct answer from the list below. Not all of the answers will be used.
-Succinate dehydrogenase is located in the ____________.
A)cytosol
B)isocitrate dehydrogenase
C)anaplerotic
D)harvest
E)cis-aconitate
F)melonate
G)metabolon
H)oxaloacetate
I)inner membrane
J)citrate
K)carbon dioxide
L)glyoxylate cycle
M)malate dehydrogenase

Accepted Answer

Succinate dehydrogenase is an enzyme located in the inner membrane of the mitochondria.

Question 5

_______________ is a citric acid cycle enzyme that is also an example of an iron-sulfur protein.

Accepted Answer

The answer of _______________ is a citric acid cycle enzyme...

Question 6

Use the following to answer questions
Choose the correct answer from the list below. Not all of the answers will be used.
-____________: The product found by the condensation of oxaloacetate and acetyl CoA.
A)cytosol
B)isocitrate dehydrogenase
C)anaplerotic
D)harvest
E)cis-aconitate
F)melonate
G)metabolon
H)oxaloacetate
I)inner membrane
J)citrate
K)carbon dioxide
L)glyoxylate cycle
M)malate dehydrogenase

Accepted Answer

Citrate is the product found by the condensation of oxaloacetate and acetyl CoA.

Question 7

During the oxidation of isocitrate, the intermediate that is decarboxylated to form α-ketoglutarate is _______________.

Accepted Answer

The answer of During the oxidation of isocitrate, the intermediate...

Question 8

Use the following to answer questions
Choose the correct answer from the list below. Not all of the answers will be used.
-____________ is the primary control point of the citric acid cycle.
A)cytosol
B)isocitrate dehydrogenase
C)anaplerotic
D)harvest
E)cis-aconitate
F)melonate
G)metabolon
H)oxaloacetate
I)inner membrane
J)citrate
K)carbon dioxide
L)glyoxylate cycle
M)malate dehydrogenase

Accepted Answer

Isocitrate dehydrogenase is a key enzyme in the citric acid cycle, acting as a primary control point by catalyzing the oxidative decarboxylation of isocitrate to alpha-ketoglutarate, which is a rate-limiting step in the cycle.

Question 9

Use the following to answer questions
Choose the correct answer from the list below. Not all of the answers will be used.
-The intermediate between citrate and isocitrate is ____________.
A)cytosol
B)isocitrate dehydrogenase
C)anaplerotic
D)harvest
E)cis-aconitate
F)melonate
G)metabolon
H)oxaloacetate
I)inner membrane
J)citrate
K)carbon dioxide
L)glyoxylate cycle
M)malate dehydrogenase

Accepted Answer

Cis-aconitate is the intermediate between citrate and isocitrate in the citric acid cycle.

Question 10

______________ reactions are the process of filling up a cycle with outside carbon compounds.

Accepted Answer

The answer of ______________ reactions are the process of filling...

Question 11

_______________ are organelles in plants and some bacteria where two-carbon acetyl units are converted into four-carbon units (succinate) for glucose synthesis, energy production, and biosynthesis.

Accepted Answer

The answer of _______________ are organelles in plants and some...

Question 12

Use the following to answer questions
Choose the correct answer from the list below. Not all of the answers will be used.
-The product of the complete oxidation of carbon in the citric acid cycle is ____________.
A)cytosol
B)isocitrate dehydrogenase
C)anaplerotic
D)harvest
E)cis-aconitate
F)melonate
G)metabolon
H)oxaloacetate
I)inner membrane
J)citrate
K)carbon dioxide
L)glyoxylate cycle
M)malate dehydrogenase

Accepted Answer

The product of the complete oxidation of carbon in the citric acid cycle is carbon dioxide.

Question 13

Use the following to answer questions
Choose the correct answer from the list below. Not all of the answers will be used.
-____________: This citric acid cycle intermediate is at both the beginning and the end of the citric acid cycle.
A)cytosol
B)isocitrate dehydrogenase
C)anaplerotic
D)harvest
E)cis-aconitate
F)melonate
G)metabolon
H)oxaloacetate
I)inner membrane
J)citrate
K)carbon dioxide
L)glyoxylate cycle
M)malate dehydrogenase

Accepted Answer

Oxaloacetate is the molecule that combines with acetyl-CoA to form citrate at the beginning of the citric acid cycle and is regenerated at the end of the cycle, making it present at both the beginning and the end.

Question 14

In general, the citric acid cycle is inhibited under _____________ (high, low) energy conditions.

Accepted Answer

The answer of In general, the citric acid cycle is...

Question 15

In the citric acid cycle, the _______________ is produced by a substrate-level phosphorylation.

Accepted Answer

The answer of In the citric acid cycle, the _______________...

Question 16

Organisms that can convert fat into sugar use the _______________ cycle .

Accepted Answer

The answer of Organisms that can convert fat into sugar...

Question 17

Use the following to answer questions
Choose the correct answer from the list below. Not all of the answers will be used.
-____________: A name suggested for associated multienzyme complexes in metabolism.
A)cytosol
B)isocitrate dehydrogenase
C)anaplerotic
D)harvest
E)cis-aconitate
F)melonate
G)metabolon
H)oxaloacetate
I)inner membrane
J)citrate
K)carbon dioxide
L)glyoxylate cycle
M)malate dehydrogenase

Accepted Answer

The name suggested for associated multienzyme complexes in metabolism is metabolon. None of the other choices fit this definition.

Question 18

Use the following to answer questions
Choose the correct answer from the list below. Not all of the answers will be used.
-____________: The name applied to metabolic reactions that replenish the citric acid cycle intermediates that are depleted because they were used for biosynthesis.
A)cytosol
B)isocitrate dehydrogenase
C)anaplerotic
D)harvest
E)cis-aconitate
F)melonate
G)metabolon
H)oxaloacetate
I)inner membrane
J)citrate
K)carbon dioxide
L)glyoxylate cycle
M)malate dehydrogenase

Accepted Answer

Anaplerotic refers to metabolic reactions that replenish the citric acid cycle intermediates that are depleted because they were used for biosynthesis.

Question 19

Carbons from carbohydrates enter the citric acid cycle in the form of _______________.

Accepted Answer

The answer of Carbons from carbohydrates enter the citric acid...

Question 20

The free energy at standard state for MDH in the direction of the citric acid cycle is _______________.

Accepted Answer

The answer of The free energy at standard state for...

Quiz 19: Harvesting Electrons From the Cycle

Use the following to answer questions Choose the correct answer from the list below. Not all of the answers will be used. -The substance ____________ is a competitive inhibitor of succinate dehydrogenase.

_______________ is the first citric acid cycle intermediate to be oxidized.

Use the following to answer questions Choose the correct answer from the list below. Not all of the answers will be used. -The function of the citric acid cycle is to ____________ high-energy electrons.

Use the following to answer questions Choose the correct answer from the list below. Not all of the answers will be used. -Succinate dehydrogenase is located in the ____________.

_______________ is a citric acid cycle enzyme that is also an example of an iron-sulfur protein.

Use the following to answer questions Choose the correct answer from the list below. Not all of the answers will be used. -____________: The product found by the condensation of oxaloacetate and acetyl CoA.

During the oxidation of isocitrate, the intermediate that is decarboxylated to form α-ketoglutarate is _______________.

Use the following to answer questions Choose the correct answer from the list below. Not all of the answers will be used. -____________ is the primary control point of the citric acid cycle.

Use the following to answer questions Choose the correct answer from the list below. Not all of the answers will be used. -The intermediate between citrate and isocitrate is ____________.

______________ reactions are the process of filling up a cycle with outside carbon compounds.

_______________ are organelles in plants and some bacteria where two-carbon acetyl units are converted into four-carbon units (succinate) for glucose synthesis, energy production, and biosynthesis.

Use the following to answer questions Choose the correct answer from the list below. Not all of the answers will be used. -The product of the complete oxidation of carbon in the citric acid cycle is ____________.

Use the following to answer questions Choose the correct answer from the list below. Not all of the answers will be used. -____________: This citric acid cycle intermediate is at both the beginning and the end of the citric acid cycle.

In general, the citric acid cycle is inhibited under _____________ (high, low) energy conditions.

In the citric acid cycle, the _______________ is produced by a substrate-level phosphorylation.

Organisms that can convert fat into sugar use the _______________ cycle .

Use the following to answer questions Choose the correct answer from the list below. Not all of the answers will be used. -____________: A name suggested for associated multienzyme complexes in metabolism.

Use the following to answer questions Choose the correct answer from the list below. Not all of the answers will be used. -____________: The name applied to metabolic reactions that replenish the citric acid cycle intermediates that are depleted because they were used for biosynthesis.

Carbons from carbohydrates enter the citric acid cycle in the form of _______________.

The free energy at standard state for MDH in the direction of the citric acid cycle is _______________.