Question 1

Identify a metabolic pathway associated with the enzymes localized in the mitochondrial matrix.

Accepted Answer

A)  the citric acid cycle 
B)  the oxidative phosphorylation pathway 
C)  the citric acid cycle and the oxidative phosphorylation pathway 
D)  none of these 
A)  the citric acid cycle 
B)  the oxidative phosphorylation pathway 
C)  the citric acid cycle and the oxidative phosphorylation pathway 
D)  none of these

Question 2

How much energy is released during the hydrolysis of a phosphoric anhydride bond?

Accepted Answer

A)  3.4 kcal/mol 
B)  7.3 kcal/mol 
C)  10.7 kcal/mol 
D)  18 kcal/mol 
A)  3.4 kcal/mol 
B)  7.3 kcal/mol 
C)  10.7 kcal/mol 
D)  18 kcal/mol

Question 3

Which part of a mitochondrion contains the enzymes that catalyze the citric acid cycle?

Accepted Answer

A)  inner mitochondrial membrane 
B)  matrix 
C)  outer mitochondrial membrane 
D)  They are present throughout a mitochondrion. 
A)  inner mitochondrial membrane 
B)  matrix 
C)  outer mitochondrial membrane 
D)  They are present throughout a mitochondrion.

Question 4

Examine the given diagram of a cell organelle. Which numbered structure in the given diagram represents the cristae?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
A)  1 
B)  2 
C)  3 
D)  4

Question 5

Which of the following subunits of the F1 sector stabilizes the proton-translocating ATPase complex?

Accepted Answer

A)  the α subunit 
B)  the β subunit 
C)  the γ subunit 
D)  the δ subunit 
A)  the α subunit 
B)  the β subunit 
C)  the γ subunit 
D)  the δ subunit

Question 6

Which of the following species is transported by CoA?

Accepted Answer

A)  CH3O− 
B)  CH3CO− 
C)  CH3COO− 
D)  C2H5O2− 
A)  CH3O− 
B)  CH3CO− 
C)  CH3COO− 
D)  C2H5O2−

Question 7

How many molecules of ATP are produced for each molecule of FADH2 utilized in the oxidative phosphorylation pathway?

Accepted Answer

A)  2.0 
B)  1.5 
C)  2.5 
D)  1.0 
A)  2.0 
B)  1.5 
C)  2.5 
D)  1.0

Question 8

Identify the final principal compound in the common catabolic pathway.

Accepted Answer

A)  coenzyme A 
B)  acetate 
C)  riboflavin 
D)  nicotinamide 
A)  coenzyme A 
B)  acetate 
C)  riboflavin 
D)  nicotinamide

Question 9

Complex I of the electron and H+ transport chain contains a number of clusters that contain a metal and a nonmetal. Which of the following elements are found in these clusters?

Accepted Answer

A)  iron and nitrogen 
B)  iron and sulfur 
C)  magnesium and nitrogen 
D)  magnesium and sulfur 
A)  iron and nitrogen 
B)  iron and sulfur 
C)  magnesium and nitrogen 
D)  magnesium and sulfur

Question 10

Which of the following compounds is an intermediate formed during the conversion of citrate to isocitrate?

Accepted Answer

A)  cis-aconitate 
B)  trans-aconitate 
C)  fumarate 
D)  malate 
A)  cis-aconitate 
B)  trans-aconitate 
C)  fumarate 
D)  malate

Question 11

Why is cytochrome c called a mobile carrier of electrons?

Accepted Answer

A)  Because it can move from the inside to the outside of the mitochondria 
B)  Because it can move laterally in the intermembrane space 
C)  Because it can move laterally in the lipid bilayer 
D)  Because it can move laterally in the matrix 
A)  Because it can move from the inside to the outside of the mitochondria 
B)  Because it can move laterally in the intermembrane space 
C)  Because it can move laterally in the lipid bilayer 
D)  Because it can move laterally in the matrix

Question 12

Consider the structural diagram of the operative part of a biologically active molecule. Which of the following coenzymes has the given structure?

Accepted Answer

A)  NAD+ 
B)  NADH 
C)  FAD 
D)  FADH2 
A)  NAD+ 
B)  NADH 
C)  FAD 
D)  FADH2

Question 13

Which of the following nucleotides releases the maximum energy on hydrolysis?

Accepted Answer

A)  ATP 
B)  ADP 
C)  AMP 
D)  All of these release equal amounts of energy. 
A)  ATP 
B)  ADP 
C)  AMP 
D)  All of these release equal amounts of energy.

Question 14

How many molecules of ATP are produced for each molecule of NADH utilized in the oxidative phosphorylation pathway?

Accepted Answer

A)  2.0 
B)  1.5 
C)  2.5 
D)  1.0 
A)  2.0 
B)  1.5 
C)  2.5 
D)  1.0

Question 15

Which of the following compounds stimulates the enzyme isocitrate dehydrogenase?

Accepted Answer

A)  ATP and NADH + H+ 
B)  ADP and NAD+ 
C)  acetyl CoA 
D)  none of these 
A)  ATP and NADH + H+ 
B)  ADP and NAD+ 
C)  acetyl CoA 
D)  none of these

Question 16

When considering both electron and H+ transport and the chemiosmotic pump, which of the following is the correct sequence of energy transformations?

Accepted Answer

A)  chemical → electrical → mechanical 
B)  chemical → mechanical → electrical 
C)  electrical → chemical → mechanical 
D)  electrical → mechanical → chemical 
A)  chemical → electrical → mechanical 
B)  chemical → mechanical → electrical 
C)  electrical → chemical → mechanical 
D)  electrical → mechanical → chemical

Question 17

Which of the following organelles remove damaged cellular materials and foreign materials from cells?

Accepted Answer

A)  Golgi bodies 
B)  lysosomes 
C)  mitochondria 
D)  smooth endoplasmic reticuli 
A)  Golgi bodies 
B)  lysosomes 
C)  mitochondria 
D)  smooth endoplasmic reticuli

Question 18

Which of the following sequences of reactions occurs during the conversion of isocitrate to α-ketoglutarate?

Accepted Answer

A)  decarboxylation followed by oxidation 
B)  decarboxylation followed by reduction 
C)  oxidation followed by decarboxylation 
D)  reduction followed by decarboxylation 
A)  decarboxylation followed by oxidation 
B)  decarboxylation followed by reduction 
C)  oxidation followed by decarboxylation 
D)  reduction followed by decarboxylation

Question 19

Which of the following statements is true of a mitochondrion?

Accepted Answer

A)  It is single-membraned organelle. 
B)  It is double-membraned organelle. 
C)  It is triple-membraned organelle. 
D)  It does not have a membrane. 
A)  It is single-membraned organelle. 
B)  It is double-membraned organelle. 
C)  It is triple-membraned organelle. 
D)  It does not have a membrane.

Question 20

Which of the following correctly describes the electron flow in complex IV?

Accepted Answer

A)  cytochrome a → cytochrome b → cytochrome c 
B)  cytochrome a → cytochrome a3 → cytochrome c 
C)  cytochrome a3 → cytochrome a → cytochrome c 
D)  cytochrome c → cytochrome a → cytochrome a3 
A)  cytochrome a → cytochrome b → cytochrome c 
B)  cytochrome a → cytochrome a3 → cytochrome c 
C)  cytochrome a3 → cytochrome a → cytochrome c 
D)  cytochrome c → cytochrome a → cytochrome a3

Exam 26: Bioenergetics: How the Body Converts Food to Energy

Identify a metabolic pathway associated with the enzymes localized in the mitochondrial matrix.

How much energy is released during the hydrolysis of a phosphoric anhydride bond?

Which part of a mitochondrion contains the enzymes that catalyze the citric acid cycle?

Examine the given diagram of a cell organelle. Which numbered structure in the given diagram represents the cristae?

Which of the following subunits of the F1 sector stabilizes the proton-translocating ATPase complex?

Which of the following species is transported by CoA?

How many molecules of ATP are produced for each molecule of FADH2 utilized in the oxidative phosphorylation pathway?

Identify the final principal compound in the common catabolic pathway.

Complex I of the electron and H+ transport chain contains a number of clusters that contain a metal and a nonmetal. Which of the following elements are found in these clusters?

Which of the following compounds is an intermediate formed during the conversion of citrate to isocitrate?

Why is cytochrome c called a mobile carrier of electrons?

Consider the structural diagram of the operative part of a biologically active molecule. Which of the following coenzymes has the given structure?

Which of the following nucleotides releases the maximum energy on hydrolysis?

How many molecules of ATP are produced for each molecule of NADH utilized in the oxidative phosphorylation pathway?

Which of the following compounds stimulates the enzyme isocitrate dehydrogenase?

When considering both electron and H+ transport and the chemiosmotic pump, which of the following is the correct sequence of energy transformations?

Which of the following organelles remove damaged cellular materials and foreign materials from cells?

Which of the following sequences of reactions occurs during the conversion of isocitrate to α-ketoglutarate?

Which of the following statements is true of a mitochondrion?

Which of the following correctly describes the electron flow in complex IV?

Matter, Energy, and Measurement

Atoms

Chemical Bonds

Chemical Reactions

Gases, Liquids, and Solids

Solutions and Colloids

Reaction Rates and Chemical Equilibrium

Acids and Bases

Nuclear Chemistry

Organic Chemistry

Alkanes

Alkenes, Alkynes, and Aromatic Compounds

Alcohols, Ethers, and Thiols

Chirality: the Handedness of Molecules

Amines

Aldehydes and Ketones

Carboxylic Acids

Carboxylic Anhydrides, Esters, and Amides

Carbohydrates

Lipids

Proteins

Enzymes

Chemical Communications: Neurotransmitters and Hormones

Nucleotides, Nucleic Acids, and Heredity

Gene Expression and Protein Synthesis

Specific Catabolic Pathways: Carbohydrate, Lipid, and Protein Metabolism

Biosynthetic Pathways

Nutrition

Immunochemistry

Body Fluids

Filters

Which of the following subunits of the F₁ sector stabilizes the proton-translocating ATPase complex?

How many molecules of ATP are produced for each molecule of FADH₂ utilized in the oxidative phosphorylation pathway?

Complex I of the electron and H⁺ transport chain contains a number of clusters that contain a metal and a nonmetal. Which of the following elements are found in these clusters?

When considering both electron and H⁺ transport and the chemiosmotic pump, which of the following is the correct sequence of energy transformations?