Question 1

Which of the following components of the electron and H+ transport chain carries both electrons and protons?

Accepted Answer

A)  FMN 
B)  cytochrome a 
C)  FeS 
D)  cytochrome c 
A)  FMN 
B)  cytochrome a 
C)  FeS 
D)  cytochrome c

Question 2

Which of the following is not a function of proton-translocating ATPase?

Accepted Answer

A)  transporting protons from the intermembrane space to the matrix of mitochondria 
B)  transporting protons from the matrix to the intermembrane space of mitochondria 
C)  causing the hydrolysis of ATP to ADP in mitochondria 
D)  None, all of these are the functions of proton-translocating ATPase. 
A)  transporting protons from the intermembrane space to the matrix of mitochondria 
B)  transporting protons from the matrix to the intermembrane space of mitochondria 
C)  causing the hydrolysis of ATP to ADP in mitochondria 
D)  None, all of these are the functions of proton-translocating ATPase.

Question 3

Which of the following statements is true of the structure of CoA?

Accepted Answer

A)  It has a guanine molecule. 
B)  It has a phosphotriester bond. 
C)  It has a mercaptoethylamine molecule. 
D)  It has a deoxyribose sugar. 
A)  It has a guanine molecule. 
B)  It has a phosphotriester bond. 
C)  It has a mercaptoethylamine molecule. 
D)  It has a deoxyribose sugar.

Question 4

Which of the following elements is found in complex III of the electron and H+ transport chain?

Accepted Answer

A)  calcium 
B)  cobalt 
C)  iron 
D)  chromium 
A)  calcium 
B)  cobalt 
C)  iron 
D)  chromium

Question 5

Which of the following species is the source of CO2 that is produced during the conversion of oxalosuccinate to α-ketoglutarate?

Accepted Answer

A)  acetyl CoA 
B)  oxaloacetate 
C)  succinate 
D)  none of these 
A)  acetyl CoA 
B)  oxaloacetate 
C)  succinate 
D)  none of these

Question 6

Which of the following statements is true of FAD and FADH2?

Accepted Answer

A)  FAD is the oxidized form, and FADH2 is the reduced form. 
B)  FAD is the reduced form, and FADH2 is the oxidized form. 
C)  The conversion of FAD to FADH2 is an addition reaction. 
D)  The conversion of FAD to FADH2 is a condensation reaction. 
A)  FAD is the oxidized form, and FADH2 is the reduced form. 
B)  FAD is the reduced form, and FADH2 is the oxidized form. 
C)  The conversion of FAD to FADH2 is an addition reaction. 
D)  The conversion of FAD to FADH2 is a condensation reaction.

Question 7

How is an acetyl group linked to a CoA molecule?

Accepted Answer

A)  by a phosphodiester bond 
B)  by a thioester bond 
C)  by an ether bond 
D)  by an anhydride bond 
A)  by a phosphodiester bond 
B)  by a thioester bond 
C)  by an ether bond 
D)  by an anhydride bond

Question 8

In AMP, ADP, and ATP, which type of linkage connects a phosphate group with the ribose sugar?

Accepted Answer

A)  an anhydride linkage 
B)  an ester linkage 
C)  an ether linkage 
D)  none of these 
A)  an anhydride linkage 
B)  an ester linkage 
C)  an ether linkage 
D)  none of these

Question 9

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

Accepted Answer

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

Question 10

In the citric acid cycle, which of the following reactions occurs during the conversion of oxalosuccinate to α-ketoglutarate?

Accepted Answer

A)  decarboxylation 
B)  dehydration 
C)  oxidation 
D)  reduction 
A)  decarboxylation 
B)  dehydration 
C)  oxidation 
D)  reduction

Question 11

Which of the following is the correct sequence of reactions that occur during the conversion of citrate to isocitrate?

Accepted Answer

A)  dehydration followed by hydration 
B)  hydration followed by dehydration 
C)  oxidation followed by reduction 
D)  reduction followed by oxidation 
A)  dehydration followed by hydration 
B)  hydration followed by dehydration 
C)  oxidation followed by reduction 
D)  reduction followed by oxidation

Question 12

What is the approximate lifetime of an ATP molecule in a cell?

Accepted Answer

A)  one second 
B)  one minute 
C)  one hour 
D)  one day 
A)  one second 
B)  one minute 
C)  one hour 
D)  one day

Question 13

Which part of the cell contains enzymes that catalyze the common metabolic pathways?

Accepted Answer

A)  the cytosol 
B)  the Golgi bodies 
C)  the mitochondria 
D)  the nucleus 
A)  the cytosol 
B)  the Golgi bodies 
C)  the mitochondria 
D)  the nucleus

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

Which of the following components of the electron and H+ transport chain carries both electrons and protons?

Which of the following is not a function of proton-translocating ATPase?

Which of the following statements is true of the structure of CoA?

Which of the following elements is found in complex III of the electron and H+ transport chain?

Which of the following species is the source of CO2 that is produced during the conversion of oxalosuccinate to α-ketoglutarate?

Which of the following statements is true of FAD and FADH2?

How is an acetyl group linked to a CoA molecule?

In AMP, ADP, and ATP, which type of linkage connects a phosphate group with the ribose sugar?

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

In the citric acid cycle, which of the following reactions occurs during the conversion of oxalosuccinate to α-ketoglutarate?

Which of the following is the correct sequence of reactions that occur during the conversion of citrate to isocitrate?

What is the approximate lifetime of an ATP molecule in a cell?

Which part of the cell contains enzymes that catalyze the common metabolic pathways?

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 components of the electron and H⁺ transport chain carries both electrons and protons?

Which of the following elements is found in complex III of the electron and H⁺ transport chain?

Which of the following species is the source of CO₂ that is produced during the conversion of oxalosuccinate to α-ketoglutarate?

Which of the following statements is true of FAD and FADH₂?