Question 1

In the citric acid cycle,the acetyl group is removed from acetyl CoA and attached to oxaloacetate to form

Accepted Answer

A)  oxaloacetate.
B)  citrate.
C)  malate.
D)  succinate.
E)  fumaratE.F) A) and B)
G) B) and E)

Question 2

The enzyme responsible for converting pyruvate to acetyl CoA is called

Accepted Answer

A)  hexokinase.
B)  pyruvate oxidase.
C)  ATP synthase.
D)  pyruvate dehydrogenase.
E)  peptidasE.F) A) and E)
G) All of the above

Question 3

The reaction phosphoenolpyruvate + ADP  →\rarr→  pyruvate + ATP ( Δ\DeltaΔ G = -7.5 kcal/mole) ,

Accepted Answer

A)  consumes energy.
B)  is not spontaneous.
C)  is an endergonic reaction.
D)  requires that energy is being transferred from phosphoenolpyruvate to ADP.
E)  requires that energy is being transferred from ADP to phosphoenolpyruvatE. F) B) and E)
G) A) and E)

Question 4

High-energy electrons from molecules of NADH and FADH2 are transferred to a chain of proteins within the electron transport chain.What is the final protein in the electron transport chain?

Accepted Answer

A)  carbon dioxide
B)  NAD+
C)  ubiquinone
D)  cytochrome c
E)  oxygenF) A) and B)
G) A) and C)

Question 5

The process of breaking glycogen down to glucose is an example of

Accepted Answer

A)  catabolism
B)  catalysis
C)  dehydration
D)  anabolism
E)  metabolismF) A) and B)
G) B) and D)

Question 6

Enzymes are consumed in chemical reactions and must therefore be replenished.

Accepted Answer

A) True 
 B)False

Question 7

Glycolysis involves 10 enzyme-catalyzed steps,that can be grouped into three phases: energy investment phase,cleavage phase,and the energy liberation phase.

Accepted Answer

A) True 
 B)False

Question 8

In the equation,C6H12O6 + 6O2  →\rarr→  6CO2 + 6H2O,ATP and heat would be on which side of the reaction?

Accepted Answer

A)  The reactants because this is an endergonic reaction.
B)  The reactants because this is an exergonic reaction.
C)  The products because this is an endergonic reaction.
D)  It could appear on either size because this reaction is in equilibrium.
E)  The products because this is an exergonic reaction. F) B) and C)
G) All of the above

Question 9

Noncompetitive inhibitors bind the active site of an enzyme,reducing its activity and the subsequent formation of product.

Accepted Answer

A) True 
 B)False

Question 10

Where are the protein complexes associated with the electron transport chain located?

Accepted Answer

A)  mitochondrial matrix
B)  mitochondrial membrane
C)  mitochondrial inner membrane
D)  mitochondrial intermembrane space
E)  cytosolF) B) and E)
G) A) and D)

Question 11

In a PET scan a patient is injected with radioactively labeled glucose.Cancer cells are often in a hypoxic environment,why would this lead to an increase in glucose uptake?

Accepted Answer

A)  More energy is produced from glucose in hypoxic conditions.
B)  They rely more on glycolysis which is less efficient than oxidative phosphorylation.
C)  They rely more on oxidative phosphorylation which is less efficient than glycolysis.
D)  Enzymes function more efficiently in the absence of oxygen.
E)  Because they require more oxygen to metabolize glucosE.F) A) and C)
G) B) and D)

Question 12

Oxygen is an excellent final electron acceptor because of its low electronegativity.

Accepted Answer

A) True 
 B)False

Question 13

Where does glycolysis takes place?

Accepted Answer

A)  mitochondrial matrix
B)  mitochondrial intermembrane space
C)  mitochondrial inner membrane
D)  mitochondrial membrane
E)  cytosolF) A) and D)
G) A) and C)

Question 14

Which of the following statements about the electron transport chain in cell respiration is CORRECT?

Accepted Answer

A)  The electron transport chain of proteins uses ATP to pump H+ across the inner mitochondria membrane against its electrochemical gradient.
B)  The electron transport chain of proteins contains pores that are leaky to H+.
C)  The loss in free energy of the electron initially donated by NADH is used to transport H+ across the inner mitochondrial membrane against its electrochemical gradient.
D)  Electrons move from NADH to a chain of proteins with lower electronegativities.
E)  The ATP synthase generates a H+ gradient across the inner mitochondrial membranE.F) A) and E)
G) C) and E)

Exam 6: Energy, Enzymes, and Cellular Respiration

Where does glycolysis takes place?

Correct Answer
verified

Which of the following statements about the electron transport chain in cell respiration is CORRECT?

Correct Answer
verified

In the citric acid cycle,the acetyl group is removed from acetyl CoA and attached to oxaloacetate to form

Correct Answer
verified

In the equation,C₆H₁₂O₆ + 6O₂ $\rarr$ 6CO₂ + 6H₂O,ATP and heat would be on which side of the reaction?

Correct Answer
verified

The enzyme responsible for converting pyruvate to acetyl CoA is called

Correct Answer
verified

Enzymes are consumed in chemical reactions and must therefore be replenished.

Correct Answer
verified

The process of breaking glycogen down to glucose is an example of

Correct Answer
verified

The reaction phosphoenolpyruvate + ADP $\rarr$ pyruvate + ATP ( $\Delta$ G = -7.5 kcal/mole) ,

Correct Answer
verified

Where are the protein complexes associated with the electron transport chain located?

Correct Answer
verified

Noncompetitive inhibitors bind the active site of an enzyme,reducing its activity and the subsequent formation of product.

Correct Answer
verified

High-energy electrons from molecules of NADH and FADH₂ are transferred to a chain of proteins within the electron transport chain.What is the final protein in the electron transport chain?

Correct Answer
verified

Oxygen is an excellent final electron acceptor because of its low electronegativity.

Correct Answer
verified

Glycolysis involves 10 enzyme-catalyzed steps,that can be grouped into three phases: energy investment phase,cleavage phase,and the energy liberation phase.

Correct Answer
verified

In a PET scan a patient is injected with radioactively labeled glucose.Cancer cells are often in a hypoxic environment,why would this lead to an increase in glucose uptake?

Correct Answer
verified

Exam 6: Energy, Enzymes, and Cellular Respiration

Where does glycolysis takes place?

Correct AnswerverifiedShow Answer

Which of the following statements about the electron transport chain in cell respiration is CORRECT?

Correct AnswerverifiedShow Answer

In the citric acid cycle,the acetyl group is removed from acetyl CoA and attached to oxaloacetate to form

Correct AnswerverifiedShow Answer

In the equation,C6H12O6 + 6O2 →\rarr→ 6CO2 + 6H2O,ATP and heat would be on which side of the reaction?

Correct AnswerverifiedShow Answer

The enzyme responsible for converting pyruvate to acetyl CoA is called

Correct AnswerverifiedShow Answer

Enzymes are consumed in chemical reactions and must therefore be replenished.

Correct AnswerverifiedShow Answer

The process of breaking glycogen down to glucose is an example of

Correct AnswerverifiedShow Answer

The reaction phosphoenolpyruvate + ADP →\rarr→ pyruvate + ATP ( Δ\DeltaΔ G = -7.5 kcal/mole) ,

Correct AnswerverifiedShow Answer

Where are the protein complexes associated with the electron transport chain located?

Correct AnswerverifiedShow Answer

Noncompetitive inhibitors bind the active site of an enzyme,reducing its activity and the subsequent formation of product.

Correct AnswerverifiedShow Answer

High-energy electrons from molecules of NADH and FADH2 are transferred to a chain of proteins within the electron transport chain.What is the final protein in the electron transport chain?

Correct AnswerverifiedShow Answer

Oxygen is an excellent final electron acceptor because of its low electronegativity.

Correct AnswerverifiedShow Answer

Glycolysis involves 10 enzyme-catalyzed steps,that can be grouped into three phases: energy investment phase,cleavage phase,and the energy liberation phase.

Correct AnswerverifiedShow Answer

In a PET scan a patient is injected with radioactively labeled glucose.Cancer cells are often in a hypoxic environment,why would this lead to an increase in glucose uptake?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
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Correct Answer
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In the equation,C₆H₁₂O₆ + 6O₂ $\rarr$ 6CO₂ + 6H₂O,ATP and heat would be on which side of the reaction?

Correct Answer
verified

Correct Answer
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Correct Answer
verified

Correct Answer
verified

The reaction phosphoenolpyruvate + ADP $\rarr$ pyruvate + ATP ( $\Delta$ G = -7.5 kcal/mole) ,

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

High-energy electrons from molecules of NADH and FADH₂ are transferred to a chain of proteins within the electron transport chain.What is the final protein in the electron transport chain?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
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