Question 1

Electron flow down the electron-transport chain leads to:

Accepted Answer

A)  the transport of protons across the inner mitochondrial membrane from inside the matrix to the intermembrane space. 
B)  the transport of protons across the inner mitochondrial membrane from the intermembrane space into the matrix. 
C)  the coupled synthesis of GTP. 
D)  a dangerous imbalance of K+ ions across the mitochondrial membrane. 
E)  None of the above. 
A)  the transport of protons across the inner mitochondrial membrane from inside the matrix to the intermembrane space. 
B)  the transport of protons across the inner mitochondrial membrane from the intermembrane space into the matrix. 
C)  the coupled synthesis of GTP. 
D)  a dangerous imbalance of K+ ions across the mitochondrial membrane. 
E)  None of the above.

Question 2

Choose the correct path taken by a pair of electrons as they travel down the electron-transport chain.

Accepted Answer

A)  NADH → Complex I → CoQ → Complex III → Cytochrome c → Complex IV → O2 
B)  FADH2 → Complex I → CoQ → Complex III → Cytochrome c → Complex IV → O2 
C)  NADH → Complex I → Complex II→ Complex III → Cytochrome c → Complex IV → O2 
D)  FADH2 → Complex II → CoQ → Complex III → Cytochrome c → Complex IV → O2 
E)  A and D 
A)  NADH → Complex I → CoQ → Complex III → Cytochrome c → Complex IV → O2 
B)  FADH2 → Complex I → CoQ → Complex III → Cytochrome c → Complex IV → O2 
C)  NADH → Complex I → Complex II→ Complex III → Cytochrome c → Complex IV → O2 
D)  FADH2 → Complex II → CoQ → Complex III → Cytochrome c → Complex IV → O2 
E)  A and D

Question 3

The Q cycle:

Accepted Answer

A)  transfers electrons from a two-electron carrier to a one-electron carrier. 
B)  recycles protons. 
C)  acts as an NADH exchange with the cytosol. 
D)  A and B. 
E)  A, B and C. 
A)  transfers electrons from a two-electron carrier to a one-electron carrier. 
B)  recycles protons. 
C)  acts as an NADH exchange with the cytosol. 
D)  A and B. 
E)  A, B and C.

Question 4

Complex IV is also known as ________________.

Accepted Answer

Cytochrome

Question 5

________________ donates electrons to cytochrome C.

Accepted Answer

Cytochrome

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 prosthetic group _______________ is present in complexes I, II, and III of electron transport.

Accepted Answer

A) mitochondria 
B) ubiquinone 
C) coenzyme Q 
D) flavin mononucleotide (FMN) 
E) iron-sulfur clusters
F)respiration
G)transporters
H)porins
I)succinate dehydrogenase
J)cytochrome c oxidase
K)Complex II
L)Complex III 
A) mitochondria 
B) ubiquinone 
C) coenzyme Q 
D) flavin mononucleotide (FMN) 
E) iron-sulfur clusters
F)respiration
G)transporters
H)porins
I)succinate dehydrogenase
J)cytochrome c oxidase
K)Complex II
L)Complex III

Question 7

To what extent is ATP recycled on a daily basis?

Accepted Answer

A)  50 ATPs per day 
B)  300 ATPs per day 
C)  1500 ATPs per day 
D)  3000 ATPs per day 
E)  None of the above. 
A)  50 ATPs per day 
B)  300 ATPs per day 
C)  1500 ATPs per day 
D)  3000 ATPs per day 
E)  None of the above.

Question 8

Use the following to answer questions
Choose the correct answer from the list below. Not all of the answers will be used.
-A strong oxidizing agent has a strong tendency to ________________ (accept, donate) electron(s).

Accepted Answer

The answer of Use the following to answer questions
Choose the...

Question 9

Use the following to answer questions
Choose the correct answer from the list below. Not all of the answers will be used.
-_______________ is an ATP-generating process in which an inorganic substance such as oxygen serves as the ultimate electron acceptor.

Accepted Answer

A) mitochondria 
B) ubiquinone 
C) coenzyme Q 
D) flavin mononucleotide (FMN) 
E) iron-sulfur clusters
F)respiration
G)transporters
H)porins
I)succinate dehydrogenase
J)cytochrome c oxidase
K)Complex II
L)Complex III 
A) mitochondria 
B) ubiquinone 
C) coenzyme Q 
D) flavin mononucleotide (FMN) 
E) iron-sulfur clusters
F)respiration
G)transporters
H)porins
I)succinate dehydrogenase
J)cytochrome c oxidase
K)Complex II
L)Complex III

Question 10

Calculate the ∆G°ʹ for the reaction where lactate + NAD+ is converted to pyruvate + NADH.

Accepted Answer

Use the redox potential for ea

Question 11

Use the following to answer questions
Choose the correct answer from the list below. Not all of the answers will be used.
-_______________ is the complex with three Fe-sulfhydryl electron acceptors.

Accepted Answer

A) mitochondria 
B) ubiquinone 
C) coenzyme Q 
D) flavin mononucleotide (FMN) 
E) iron-sulfur clusters
F)respiration
G)transporters
H)porins
I)succinate dehydrogenase
J)cytochrome c oxidase
K)Complex II
L)Complex III 
A) mitochondria 
B) ubiquinone 
C) coenzyme Q 
D) flavin mononucleotide (FMN) 
E) iron-sulfur clusters
F)respiration
G)transporters
H)porins
I)succinate dehydrogenase
J)cytochrome c oxidase
K)Complex II
L)Complex III

Question 12

Use the following to answer questions
Choose the correct answer from the list below. Not all of the answers will be used.
-Another name for ubiquinone is ________________.

Accepted Answer

A) mitochondria 
B) ubiquinone 
C) coenzyme Q 
D) flavin mononucleotide (FMN) 
E) iron-sulfur clusters
F)respiration
G)transporters
H)porins
I)succinate dehydrogenase
J)cytochrome c oxidase
K)Complex II
L)Complex III 
A) mitochondria 
B) ubiquinone 
C) coenzyme Q 
D) flavin mononucleotide (FMN) 
E) iron-sulfur clusters
F)respiration
G)transporters
H)porins
I)succinate dehydrogenase
J)cytochrome c oxidase
K)Complex II
L)Complex III

Question 13

In which direction do electrons flow in the electron transport chain?

Accepted Answer

The electron transport chain p

Question 14

What is a major defense strategy against oxidative damage caused by reactive oxygen species (ROS)?

Accepted Answer

The reduction potential for ir

Question 15

Explain why less ATP is made from the reoxidation of FADH2 compared to NADH.

Accepted Answer

Complex II is not a proton pump. When el

Question 16

Use the following to answer questions
Choose the correct answer from the list below. Not all of the answers will be used.
-Cytochrome ________________ is the only water-soluble cytochrome of the electron-transport chain.

Accepted Answer

A) mitochondria 
B) ubiquinone 
C) coenzyme Q 
D) flavin mononucleotide (FMN) 
E) iron-sulfur clusters
F)respiration
G)transporters
H)porins
I)succinate dehydrogenase
J)cytochrome c oxidase
K)Complex II
L)Complex III 
A) mitochondria 
B) ubiquinone 
C) coenzyme Q 
D) flavin mononucleotide (FMN) 
E) iron-sulfur clusters
F)respiration
G)transporters
H)porins
I)succinate dehydrogenase
J)cytochrome c oxidase
K)Complex II
L)Complex III

Question 17

What is the "dead zone" in the Gulf of Mexico and how did it come into being?

Accepted Answer

The dead zone is a region of the Gulf of

Question 18

What are the fully oxidized and fully reduced states of coenzyme Q and how are they related to transmembrane proton transport?

Accepted Answer

In the fully oxidized state, ubiquinone

Question 19

In proteins, these amino acid residues usually complex to the iron-sulfur clusters.

Accepted Answer

A)  glycine 
B)  arginine 
C)  cysteine 
D)  All of the above. 
E)  None of the above. 
A)  glycine 
B)  arginine 
C)  cysteine 
D)  All of the above. 
E)  None of the above.

Question 20

Use the following to answer questions
Choose the correct answer from the list below. Not all of the answers will be used.
-The citric acid cycle enzyme _______________ is also part of an electron-transport complex.

Accepted Answer

A) mitochondria 
B) ubiquinone 
C) coenzyme Q 
D) flavin mononucleotide (FMN) 
E) iron-sulfur clusters
F)respiration
G)transporters
H)porins
I)succinate dehydrogenase
J)cytochrome c oxidase
K)Complex II
L)Complex III 
A) mitochondria 
B) ubiquinone 
C) coenzyme Q 
D) flavin mononucleotide (FMN) 
E) iron-sulfur clusters
F)respiration
G)transporters
H)porins
I)succinate dehydrogenase
J)cytochrome c oxidase
K)Complex II
L)Complex III

Exam 20: The Electron Transport Chain

Electron flow down the electron-transport chain leads to:

Choose the correct path taken by a pair of electrons as they travel down the electron-transport chain.

The Q cycle:

Complex IV is also known as ________________.

________________ donates electrons to cytochrome C.

Use the following to answer questions Choose the correct answer from the list below. Not all of the answers will be used. -The prosthetic group _______________ is present in complexes I, II, and III of electron transport.

To what extent is ATP recycled on a daily basis?

Use the following to answer questions Choose the correct answer from the list below. Not all of the answers will be used. -A strong oxidizing agent has a strong tendency to ________________ (accept, donate) electron(s).

Use the following to answer questions Choose the correct answer from the list below. Not all of the answers will be used. -_______________ is an ATP-generating process in which an inorganic substance such as oxygen serves as the ultimate electron acceptor.

Calculate the ∆G°ʹ for the reaction where lactate + NAD+ is converted to pyruvate + NADH.

Use the following to answer questions Choose the correct answer from the list below. Not all of the answers will be used. -_______________ is the complex with three Fe-sulfhydryl electron acceptors.

Use the following to answer questions Choose the correct answer from the list below. Not all of the answers will be used. -Another name for ubiquinone is ________________.

In which direction do electrons flow in the electron transport chain?

What is a major defense strategy against oxidative damage caused by reactive oxygen species (ROS)?

Explain why less ATP is made from the reoxidation of FADH2 compared to NADH.

Use the following to answer questions Choose the correct answer from the list below. Not all of the answers will be used. -Cytochrome ________________ is the only water-soluble cytochrome of the electron-transport chain.

What is the "dead zone" in the Gulf of Mexico and how did it come into being?

What are the fully oxidized and fully reduced states of coenzyme Q and how are they related to transmembrane proton transport?

In proteins, these amino acid residues usually complex to the iron-sulfur clusters.

Use the following to answer questions Choose the correct answer from the list below. Not all of the answers will be used. -The citric acid cycle enzyme _______________ is also part of an electron-transport complex.

Biochemistry and the Unity of Life

Water, Weak Bonds, and the Generation of Order Out of Chaos

Amino Acids

Protein Three-Dimensional Structure

Techniques in Protein Biochemistry

Basic Concepts of Enzyme Action

Kinetics and Regulation

Mechanisms and Inhibitors

Hemoglobin: an Allosteric Protein

Carbohydrates

Lipids

Membrane Structure and Function

Signal Transduction Pathways

Digestion: Turning a Meal Into Cellular Biochemicals

Metabolism: Basic Concepts and Design

Glycolysis

Gluconeogenesis

Preparation for the Cycle

Harvesting Electrons From the Cycle

The Proton-Motive Force

The Light Reactions

The Calvin Cycle

Glycogen Degradation

Glycogen Synthesis

The Pentose Phosphate Pathway

Fatty Acid Degredation

Fatty Acid Synthesis

Lipid Synthesis

Amino Acid Degradation and the Urea Cycle

Amino Acids Synthesis

Nucleotide Metabolism

The Structure of Informational Macromolecules: Dna and Rna

DNA Replication

DNA Repair and Recombination

RNA Synthesis and Regulation in Prokaryotes

Gene Expression in Eukaryotes

RNA Processing in Eukaryotes

The Genetic Code

The Mechanism of Protein Synthesis

Recombinant Dna Techniques

Filters