Question 1

Why do cells go through fermentation in our body?

Accepted Answer

A)   to replenish NAD+
B)   to replenish O2
C)   to replenish FAD
D)   to replenish NADH

Question 2

Refer to the illustration of a mitochondrion. Match the labelled parts of the mitochondrion with the steps of cellular respiration. A labelled part may be used once, more than once, or not at all. 
-pyruvate oxidation
A)outer mitochondrial membrane
B)intermembrane compartment
C)cytosol
D)inner mitochondrial membrane
E)matrix

Accepted Answer

The answer of Refer to the illustration of a mitochondrion....

Question 3

Which of these statements best explains the energetic status of cellular respiration?

Accepted Answer

A)   It is an exergonic process with negative free energy.
B)   It is an endergonic process with negative free energy.
C)   It is an exergonic process with positive free energy.
D)   It is an endergonic process with positive free energy.

Question 4

Which statement best describes the function of NADH and FADH2?

Accepted Answer

A)   Both produce ATP by substrate-level phosphorylation.
B)   Both transport acetyl-CoA to mitochondria.
C)   Both provide electrons to the electron transport system.
D)   Both release energy for glycolysis to proceed.

Question 5

Where is ATP synthase located in eukaryotic cells?

Accepted Answer

A)   in the matrix of the mitochondria
B)   in the outer membrane of the cell
C)   in the nuclear envelope
D)   in the inner mitochondrial membrane

Question 6

Refer to the illustration of a mitochondrion. Match the labelled parts of the mitochondrion with the steps of cellular respiration. A labelled part may be used once, more than once, or not at all. 
-glycolysis
A)outer mitochondrial membrane
B)intermembrane compartment
C)cytosol
D)inner mitochondrial membrane
E)matrix

Accepted Answer

The answer of Refer to the illustration of a mitochondrion....

Question 7

Which chemical characteristic makes phosphoenolpyruvate (PEP)  unusual?

Accepted Answer

A)   PEP regulates the activity of phosphofructokinase.
B)   PEP can carry out redox reactions.
C)   PEP provides high-energy electrons to make ATP.
D)   PEP supplies a high-energy phosphate to phosphorylate ADP.

Question 8

If, during a chemical reaction, a molecule loses hydrogens, it could be described as being oxidized.

Accepted Answer

A) True 
 B)False

Question 9

Consider the contribution of NADH and FADH2. How many of the 32 total ATP molecules produced in cellular respiration come from oxidative phosphorylation?

Accepted Answer

A)   20
B)   22
C)   28
D)   30

Question 10

Which phrase describes the mechanism that facilitates the passage of electrons between protein complexes in the mitochondrial inner membrane?

Accepted Answer

A)   The oxidized electron carrier protein passes on the electron to FADH and becomes reduced.
B)   The reduced electron carrier protein passes on the electron to the next protein and becomes oxidized.
C)   The reduced electron carrier protein passes on the electron to FADH and becomes oxidized.
D)  The oxidized electron carrier protein passes on the electron to the next protein and becomes reduced.

Question 11

In the process of aerobic metabolism, carbon-containing molecules are broken down. What is the energy from the electrons used for?

Accepted Answer

A)   to generate a proton gradient
B)   to heat the organism in a cold environment
C)   to alter enzyme structure
D)   to directly supply the energy needs of an organism

Question 12

Glycolysis takes place in the mitochondria of a cells.

Accepted Answer

A) True 
 B)False

Question 13

Which phrase best describes what occurs during chemiosmosis?

Accepted Answer

A)   the synthesis of ATP by ATP synthase using energy from the proton gradient
B)   the buildup of acetate in the cytoplasm in the absence of oxygen
C)   the breakdown of oxygen as it enters the mitochondria
D)   the production of NADH and FADH2 in cellular respiration

Question 14

Which of these analogies best illustrates the following: Sugars contain energy, but we have to break them apart to release the energy in order to make the high energy chemical called ATP.

Accepted Answer

A)   electrons of matter
B)   photons of light
C)   letters in a word
D)   books in a library

Question 15

What is the final product of glycolysis?

Accepted Answer

A)   1 molecule of pyruvate
B)   2 molecules of pyruvate
C)   1 molecule of glyceraldehyde-3-phosphate
D)   2 molecules of glyceraldehyde-3-phosphate

Question 16

Which of the following molecules is responsible for carrying the acetyl group from pyruvate into the citric acid cycle?

Accepted Answer

A)   FADH2
B)   ATP
C)   CoA
D)   NADH

Question 17

Which phrase best describes the chemical conditions inside the mitochondrial matrix?

Accepted Answer

A)   low pH and high pyruvate concentration
B)   high pH and high pyruvate concentration
C)   high pH and low pyruvate concentration
D)   low pH and low pyruvate concentration

Question 18

Which phrase best describes the proton-motive force?

Accepted Answer

A)   the amount of energy required to protonate a glucose molecule
B)   the force needed to move protons into the inner mitochondrial space
C)   the free energy associated with the removal of hydrogen from NADH
D)   the combination of a proton and voltage gradient across the membrane

Question 19

During pyruvate oxidation, one molecule of ATP is produced.

Accepted Answer

A) True 
 B)False

Question 20

Which part of the ATP synthase is responsible for catalyzing ATP formation?

Accepted Answer

A)   the basal unit
B)   the stalk
C)   the headpiece
D)   the lollipop-shaped complex

Exam 5: Cellular Respiration

Which chemical characteristic makes phosphoenolpyruvate (PEP) unusual?

Correct Answer
verified

Which part of the ATP synthase is responsible for catalyzing ATP formation?

Correct Answer
verified

Which of these statements best explains the energetic status of cellular respiration?

Correct Answer
verified

Glycolysis takes place in the mitochondria of a cells.

Correct Answer
verified

Which phrase best describes what occurs during chemiosmosis?

Correct Answer
verified

Correct Answer
verified

Why do cells go through fermentation in our body?

Correct Answer
verified

Which phrase best describes the chemical conditions inside the mitochondrial matrix?

Correct Answer
verified

Which of these analogies best illustrates the following: Sugars contain energy, but we have to break them apart to release the energy in order to make the high energy chemical called ATP.

Correct Answer
verified

Consider the contribution of NADH and FADH₂. How many of the 32 total ATP molecules produced in cellular respiration come from oxidative phosphorylation?

Correct Answer
verified

In the process of aerobic metabolism, carbon-containing molecules are broken down. What is the energy from the electrons used for?

Correct Answer
verified

During pyruvate oxidation, one molecule of ATP is produced.

Correct Answer
verified

If, during a chemical reaction, a molecule loses hydrogens, it could be described as being oxidized.

Correct Answer
verified

Correct Answer
verified

Which phrase describes the mechanism that facilitates the passage of electrons between protein complexes in the mitochondrial inner membrane?

Correct Answer
verified

Where is ATP synthase located in eukaryotic cells?

Correct Answer
verified

What is the final product of glycolysis?

Correct Answer
verified

Which of the following molecules is responsible for carrying the acetyl group from pyruvate into the citric acid cycle?

Correct Answer
verified

Which statement best describes the function of NADH and FADH₂?

Correct Answer
verified

Which phrase best describes the proton-motive force?

Correct Answer
verified

Exam 5: Cellular Respiration

Which chemical characteristic makes phosphoenolpyruvate (PEP) unusual?

Correct AnswerverifiedShow Answer

Which part of the ATP synthase is responsible for catalyzing ATP formation?

Correct AnswerverifiedShow Answer

Which of these statements best explains the energetic status of cellular respiration?

Correct AnswerverifiedShow Answer

Glycolysis takes place in the mitochondria of a cells.

Correct AnswerverifiedShow Answer

Which phrase best describes what occurs during chemiosmosis?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Why do cells go through fermentation in our body?

Correct AnswerverifiedShow Answer

Which phrase best describes the chemical conditions inside the mitochondrial matrix?

Correct AnswerverifiedShow Answer

Which of these analogies best illustrates the following: Sugars contain energy, but we have to break them apart to release the energy in order to make the high energy chemical called ATP.

Correct AnswerverifiedShow Answer

Consider the contribution of NADH and FADH2. How many of the 32 total ATP molecules produced in cellular respiration come from oxidative phosphorylation?

Correct AnswerverifiedShow Answer

In the process of aerobic metabolism, carbon-containing molecules are broken down. What is the energy from the electrons used for?

Correct AnswerverifiedShow Answer

During pyruvate oxidation, one molecule of ATP is produced.

Correct AnswerverifiedShow Answer

If, during a chemical reaction, a molecule loses hydrogens, it could be described as being oxidized.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which phrase describes the mechanism that facilitates the passage of electrons between protein complexes in the mitochondrial inner membrane?

Correct AnswerverifiedShow Answer

Where is ATP synthase located in eukaryotic cells?

Correct AnswerverifiedShow Answer

What is the final product of glycolysis?

Correct AnswerverifiedShow Answer

Which of the following molecules is responsible for carrying the acetyl group from pyruvate into the citric acid cycle?

Correct AnswerverifiedShow Answer

Which statement best describes the function of NADH and FADH2?

Correct AnswerverifiedShow Answer

Which phrase best describes the proton-motive force?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Consider the contribution of NADH and FADH₂. How many of the 32 total ATP molecules produced in cellular respiration come from oxidative phosphorylation?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
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Correct Answer
verified

Which statement best describes the function of NADH and FADH₂?

Correct Answer
verified

Correct Answer
verified