Question 1

Where in the cell does F1F1F1S1F1F1F10-oxidation take place?

Accepted Answer

A)  the mitochondria 
B)  the cell membrane 
C)  the cytoplasm 
D)  the nucleus 
E)  everywhere 
A)  the mitochondria 
B)  the cell membrane 
C)  the cytoplasm 
D)  the nucleus 
E)  everywhere

Question 2

During glucose metabolism, the following reaction occurs. What is this reaction called?

Accepted Answer

A)  phosphoryl group transfer reaction 
B)  hydrolysis 
C)  hydration 
D)  dehydration 
E)  oxidation 
A)  phosphoryl group transfer reaction 
B)  hydrolysis 
C)  hydration 
D)  dehydration 
E)  oxidation

Question 3

The structure below is acetyl coenzyme A. Select the choice in which each part of acetyl coenzyme A is correctly labeled.

Accepted Answer

A) a 
B) b 
C) c 
D) d 
E) e 
A) a 
B) b 
C) c 
D) d 
E) e

Question 4

Which of the following statements best describes what is illustrated in this diagram?

Accepted Answer

A)  This diagram illustrates the carbon balance of the citric acid cycle. 
B)  This diagram illustrates the electron balance of the citric acid cycle. 
C)  This diagram illustrates the oxygen balance of the citric acid cycle. 
D)  This diagram illustrates the hydrogen balance of the citric acid cycle. 
E)  All of the above are illustrated in this diagram. 
A)  This diagram illustrates the carbon balance of the citric acid cycle. 
B)  This diagram illustrates the electron balance of the citric acid cycle. 
C)  This diagram illustrates the oxygen balance of the citric acid cycle. 
D)  This diagram illustrates the hydrogen balance of the citric acid cycle. 
E)  All of the above are illustrated in this diagram.

Question 5

Which of the following statements about spontaneous reactions is NOT true?

Accepted Answer

A)  If a reaction is spontaneous, the reverse reaction is nonspontaneous. 
B)  All spontaneous reactions occur quickly. 
C)  Spontaneous reactions occur without input of energy. 
D)  Spontaneous reactions have a negative energy value. 
E)  Spontaneous reactions can do work. 
A)  If a reaction is spontaneous, the reverse reaction is nonspontaneous. 
B)  All spontaneous reactions occur quickly. 
C)  Spontaneous reactions occur without input of energy. 
D)  Spontaneous reactions have a negative energy value. 
E)  Spontaneous reactions can do work.

Question 6

During fatty acid oxidation, a fatty acid must react with coenzyme A to become a fatty acyl-CoA, as shown below.   In the body, the reaction above is coupled to the hydrolysis of two phosphate groups from ATP as shown below:   Which of the following equations is the correct calculation of the overall free energy of the coupled reaction?

Accepted Answer

A)  ΔGoverall = 7.0 kcal/mol + 15.7 kcal/mol 
B)  ΔGoverall = 7.0 kcal/mol F1F1F1S1F1F1F10 15.7 kcal/mol 
C)  ΔGoverall = 15.7 kcal/mol + 7.0 kcal/mol 
D)  ΔGoverall = 7 kcal/mol F1F1F1S1F1F1F10 15.7 kcal/mol 
E)  ΔGoverall = 7 kcal/mol F1F1F1S1F1F1F10 F1F1F1S1F1F1F1015.7 kcal/mol 
A)  ΔGoverall = 7.0 kcal/mol + 15.7 kcal/mol 
B)  ΔGoverall = 7.0 kcal/mol F1F1F1S1F1F1F10 15.7 kcal/mol 
C)  ΔGoverall = 15.7 kcal/mol + 7.0 kcal/mol 
D)  ΔGoverall = 7 kcal/mol F1F1F1S1F1F1F10 15.7 kcal/mol 
E)  ΔGoverall = 7 kcal/mol F1F1F1S1F1F1F10 F1F1F1S1F1F1F1015.7 kcal/mol

Question 7

Which of the choices above below describes the purpose of the following step of glycolysis?

Accepted Answer

A)  In this step, the molecule is phosphorylated to keep it in the cell. 
B)  In this step, the molecule is split into two, both of which will become pyruvate. 
C)  In this step, NADH is made. 
D)  In this step, energy is stored as ATP. 
E)  In this step, pyruvate is made. 
A)  In this step, the molecule is phosphorylated to keep it in the cell. 
B)  In this step, the molecule is split into two, both of which will become pyruvate. 
C)  In this step, NADH is made. 
D)  In this step, energy is stored as ATP. 
E)  In this step, pyruvate is made.

Question 8

Which of the following choices is NOT a common name for the citric acid cycle?

Accepted Answer

A)  CAC 
B)  TCA cycle 
C)  Krebs cycle 
D)  tricarboxylic acid cycle 
E)  All of these are common names of the citric acid cycle. 
A)  CAC 
B)  TCA cycle 
C)  Krebs cycle 
D)  tricarboxylic acid cycle 
E)  All of these are common names of the citric acid cycle.

Question 9

Why is the metabolism of fat sometimes called "burning fat"?

Accepted Answer

A)  because the fat is heated 
B)  because exercise is a painful activity 
C)  because the fat is oxidized 
D)  because exercise makes a person sweat and feel hot 
E)  because the fat melts 
A)  because the fat is heated 
B)  because exercise is a painful activity 
C)  because the fat is oxidized 
D)  because exercise makes a person sweat and feel hot 
E)  because the fat melts

Question 10

What is the identity of I in the following diagram of the citric acid cycle?

Accepted Answer

A)  acetate 
B)  GTP 
C)  NADH 
D)  FADH2 
E)  carbon dioxide 
A)  acetate 
B)  GTP 
C)  NADH 
D)  FADH2 
E)  carbon dioxide

Question 11

Which of the following choices illustrates the general pathway by which fats are catabolized?

Accepted Answer

A)  reduction to acetyl CoA → citric acid cycle 
B)  oxidation to acetyl CoA → citric acid cycle 
C)  hydrolysis → reduction to acetyl CoA → citric acid cycle 
D)  hydrolysis → oxidation to acetyl CoA → citric acid cycle 
E)  hydrolysis → citric acid cycle 
A)  reduction to acetyl CoA → citric acid cycle 
B)  oxidation to acetyl CoA → citric acid cycle 
C)  hydrolysis → reduction to acetyl CoA → citric acid cycle 
D)  hydrolysis → oxidation to acetyl CoA → citric acid cycle 
E)  hydrolysis → citric acid cycle

Question 12

Which of the following choices correctly label each type of bond in the following molecule of ATP?

Accepted Answer

A)  All are phosphate ester bonds. 
B)  All are phosphoanhydride bonds. 
C)  Both a and b are phosphoanhydride bonds and c is a phosphate ester bond. 
D)  Both a and b are phosphate ester bonds and c is a phosphoanhydride bonds. 
E)  Both a and c are phosphate ester bonds and b is a phosphoanhydride bonds. 
A)  All are phosphate ester bonds. 
B)  All are phosphoanhydride bonds. 
C)  Both a and b are phosphoanhydride bonds and c is a phosphate ester bond. 
D)  Both a and b are phosphate ester bonds and c is a phosphoanhydride bonds. 
E)  Both a and c are phosphate ester bonds and b is a phosphoanhydride bonds.

Question 13

What is the role of ATP synthase in the synthesis of ATP?

Accepted Answer

A)  ATP synthase harvests the energy for the synthesis. 
B)  ATP synthase catalyzes the phosphorylation of ADP reaction. 
C)  ATP synthase captures APD and Pi. 
D)  ATP synthase allows protons to flow into the matrix through its proton channel. 
E)  All of the above are roles of ATP synthase. 
A)  ATP synthase harvests the energy for the synthesis. 
B)  ATP synthase catalyzes the phosphorylation of ADP reaction. 
C)  ATP synthase captures APD and Pi. 
D)  ATP synthase allows protons to flow into the matrix through its proton channel. 
E)  All of the above are roles of ATP synthase.

Question 14

Generally, how do compounds such as rotenone and cyanide inhibit the electron transport chain?

Accepted Answer

A)  They block electron transfer downstream from the inhibitor bound enzyme. 
B)  They absorb electrons. 
C)  They are acidic. 
D)  They inhibit the production of proteins involved in the electron transfer chain. 
E)  They increase the rate of electron transfer. 
A)  They block electron transfer downstream from the inhibitor bound enzyme. 
B)  They absorb electrons. 
C)  They are acidic. 
D)  They inhibit the production of proteins involved in the electron transfer chain. 
E)  They increase the rate of electron transfer.

Question 15

The ATP synthesized during catabolic processes is used to provide energy for ____ processes in the cell.

Accepted Answer

A)  oxidative 
B)  anabolic 
C)  slow 
D)  unusual 
E)  spontaneous 
A)  oxidative 
B)  anabolic 
C)  slow 
D)  unusual 
E)  spontaneous

Question 16

The following is step 3 of the citric acid cycle. What is the functional group transformation that occurs in the first part of this step?

Accepted Answer

A)  A ketone and an alcohol change positions. 
B)  An alcohol becomes a ketone. 
C)  The -COO- is transformed. 
D)  The alcohol becomes an aldehyde. 
E)  A carbon-carbon double bond is added. 
A)  A ketone and an alcohol change positions. 
B)  An alcohol becomes a ketone. 
C)  The -COO- is transformed. 
D)  The alcohol becomes an aldehyde. 
E)  A carbon-carbon double bond is added.

Question 17

Where does ATP synthase get the energy required to drive phosphorylation of ADP?

Accepted Answer

A)  the potential energy of the proton motive force 
B)  from the reduction of NAD+ 
C)  from the hydrolysis of ATP 
D)  from the reduction of oxygen 
E)  ATP synthase does not require energy. 
A)  the potential energy of the proton motive force 
B)  from the reduction of NAD+ 
C)  from the hydrolysis of ATP 
D)  from the reduction of oxygen 
E)  ATP synthase does not require energy.

Question 18

The following is step 3 of the citric acid cycle. Isocitrate is converted into α-ketoglutarate by a(n) _______ reaction followed by _______.

Accepted Answer

A)  oxidation-reduction; phosphorylation 
B)  phosphorylation; oxidation-reduction 
C)  isomerization; dehydration 
D)  oxidation-reduction; decarboxylation 
E)  hydration; decarboxylation 
A)  oxidation-reduction; phosphorylation 
B)  phosphorylation; oxidation-reduction 
C)  isomerization; dehydration 
D)  oxidation-reduction; decarboxylation 
E)  hydration; decarboxylation

Question 19

Which of the following molecules could be transferred by coenzyme A?

Accepted Answer

A)  None of these could be transferred by Coenzyme A. 
B)  Only I could be transferred. 
C)  I and II could be transferred by Coenzyme A. 
D)  Only III could be transferred. 
E)  All of these could be transferred by Coenzyme A. 
A)  None of these could be transferred by Coenzyme A. 
B)  Only I could be transferred. 
C)  I and II could be transferred by Coenzyme A. 
D)  Only III could be transferred. 
E)  All of these could be transferred by Coenzyme A.

Question 20

Where in the cell does oxidative phosphorylation occur?

Accepted Answer

A)  everywhere 
B)  in the ribosomes 
C)  in the mitochondria 
D)  in the cytoplasm 
E)  in the nucleus 
A)  everywhere 
B)  in the ribosomes 
C)  in the mitochondria 
D)  in the cytoplasm 
E)  in the nucleus

Where in the cell does -oxidation take place?

During glucose metabolism, the following reaction occurs. What is this reaction called?

The structure below is acetyl coenzyme A. Select the choice in which each part of acetyl coenzyme A is correctly labeled.

Which of the following statements best describes what is illustrated in this diagram?

Which of the following statements about spontaneous reactions is NOT true?

Which of the choices above below describes the purpose of the following step of glycolysis?

Which of the following choices is NOT a common name for the citric acid cycle?

Why is the metabolism of fat sometimes called "burning fat"?

What is the identity of I in the following diagram of the citric acid cycle?

Which of the following choices illustrates the general pathway by which fats are catabolized?

Which of the following choices correctly label each type of bond in the following molecule of ATP?

What is the role of ATP synthase in the synthesis of ATP?

Generally, how do compounds such as rotenone and cyanide inhibit the electron transport chain?

The ATP synthesized during catabolic processes is used to provide energy for ____ processes in the cell.

The following is step 3 of the citric acid cycle. What is the functional group transformation that occurs in the first part of this step?

Where does ATP synthase get the energy required to drive phosphorylation of ADP?

The following is step 3 of the citric acid cycle. Isocitrate is converted into α-ketoglutarate by a(n) _ reaction followed by _.

Which of the following molecules could be transferred by coenzyme A?

Where in the cell does oxidative phosphorylation occur?

Measuring Matter and Energy

Atomic Structure and Nuclear Radiation

Compounds and Molecules

Chemical Quantities and Chemical Reactions

Changes of State and the Gas Laws

Organic Chemistry: Hydrocarbons

Organic Chemistry and Biomolecules

Solutions, Colloids and Membranes

Acids and Bases

The Reactions of Organic Functional Groups in Biochemistry

Carbohydrates: Structure and Function

Lipids: Structure and Function

Proteins: Structure and Function

Nucleotides and Nucleic Acids

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Exam 15: Energy and Metabolism

Where in the cell does -oxidation take place?

During glucose metabolism, the following reaction occurs. What is this reaction called?

The structure below is acetyl coenzyme A. Select the choice in which each part of acetyl coenzyme A is correctly labeled.

Which of the following statements best describes what is illustrated in this diagram?

Which of the following statements about spontaneous reactions is NOT true?

Which of the choices above below describes the purpose of the following step of glycolysis?

Which of the following choices is NOT a common name for the citric acid cycle?

Why is the metabolism of fat sometimes called "burning fat"?

What is the identity of I in the following diagram of the citric acid cycle?

Which of the following choices illustrates the general pathway by which fats are catabolized?

Which of the following choices correctly label each type of bond in the following molecule of ATP?

What is the role of ATP synthase in the synthesis of ATP?

Generally, how do compounds such as rotenone and cyanide inhibit the electron transport chain?

The ATP synthesized during catabolic processes is used to provide energy for ____ processes in the cell.

The following is step 3 of the citric acid cycle. What is the functional group transformation that occurs in the first part of this step?

Where does ATP synthase get the energy required to drive phosphorylation of ADP?

The following is step 3 of the citric acid cycle. Isocitrate is converted into α-ketoglutarate by a(n) _______ reaction followed by _______.

Which of the following molecules could be transferred by coenzyme A?

Where in the cell does oxidative phosphorylation occur?

Measuring Matter and Energy

Atomic Structure and Nuclear Radiation

Compounds and Molecules

Chemical Quantities and Chemical Reactions

Changes of State and the Gas Laws

Organic Chemistry: Hydrocarbons

Organic Chemistry and Biomolecules

Solutions, Colloids and Membranes

Acids and Bases

The Reactions of Organic Functional Groups in Biochemistry

Carbohydrates: Structure and Function

Lipids: Structure and Function

Proteins: Structure and Function

Nucleotides and Nucleic Acids

Filters

The following is step 3 of the citric acid cycle. Isocitrate is converted into α-ketoglutarate by a(n) _ reaction followed by _.