Question 1

During pyruvate oxidation, one molecule of ATP is produced.

Accepted Answer

A) True 
 B)False

Question 2

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 
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 3

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

Question 4

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. 
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 5

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 
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 6

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

Question 7

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 
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 8

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 9

Glycolysis takes place in the mitochondria of a cells.

Accepted Answer

A) True 
 B)False

Question 10

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. 
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 11

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. 
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 12

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 13

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

Question 14

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

Accepted Answer

A) True 
 B)False

Question 15

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. 
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 16

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 
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 17

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

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 
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

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

Exam 5: Cellular Respiration

During pyruvate oxidation, one molecule of ATP is produced.

What is the final product of glycolysis?

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.

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

Which phrase best describes what occurs during chemiosmosis?

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

Where is ATP synthase located in eukaryotic cells?

Glycolysis takes place in the mitochondria of a cells.

Which statement best describes the function of NADH and FADH2?

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

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

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

Which chemical characteristic makes phosphoenolpyruvate (PEP) unusual?

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

Why do cells go through fermentation in our body?

Which phrase best describes the proton-motive force?

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

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

Light and Life

The Cell: an Overview

Energy and Enzymes

Cell Membranes and Signaling

Photosynthesis

Cell Cycles

Genetic Recombination

The Chromosomal Basis of Mendelian Inheritance

Genetic Linkage, Sex-Linkage, and Other Non-Mendelian Inheritance Mechanisms

DNA Structure, Replication, and Repair

Gene Structure Expression, and Mutation

Regulation of Gene Expression

Dna Technologies

Genomes

Evolution: the Development of the Theory

Microevolution: Changes Within Populations

Speciation and Macroevolution

Systematics and Phylogenetics: Revealing the Tree of Life

Humans and Evolution

Defining Life and Its Origins

Viruses, Viroids, and Prions: Infectious Biological Particles

Bacteria and Archaea

Protists

Fungi

Plants

Animals

Conservation of Biodiversity

Population Ecology

Species Interactions and Community Ecology

Ecosystems

Animal Behaviour

Organization of the Plant Body

Transport in Plants

Reproduction and Development in Flowering Plants

Plant Nutrition

Plant Signals and Responses to the Environment

Introduction to Animal Organization and Physiology

Animal Nutrition

Gas Exchange: the Respiratory System

Internal Transport: the Circulatory System

Regulation of the Internal Environment: Water, Solutes, and Temperature

Control of Animal Processes: Endocrine Control

Animal Reproduction

Control of Animal Processes: Neural Control

Muscles, Skeletons, and Body Movements

Filters

Which statement best describes the function of NADH and FADH₂?

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