Question 1

Use the following to answer the questions below:
In each of the following multiple-choice questions, characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices:
-Statements: (1)  Inhibition of the ETC is the mechanism by which cyanide exerts its deadly effect.
(2)  Brown fat cells contain the uncoupling agent thermogenin, a protein that creates a proton channel through the outer mitochondrial membrane.
(3)  One of the body's mechanisms for adaptation to cold is the production of brown fat tissue.

Accepted Answer

A)   All three statements are true.
B)   Two of the three statements are true.
C)   Only one of the statements is true.
D)   None of the statements is true.E) A) and B)
F) B) and C)

Question 2

How many ATP molecules result from the "processing" of 10 acetyl CoA molecule through the common metabolic pathway?

Accepted Answer

A)   20
B)   80
C)   100
D)   240E) A) and C)
F) B) and D)

Question 3

Use the following to answer the questions below:
In each of the following multiple-choice questions, characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices:
-Statements: (1)  In the first step of the CAC, a C2 molecule and a C4 molecule combine to produce a C6 molecule.
(2)  ATP, ADP, and AMP differ from each other in the number of adenine subunits present.
(3)  The process by which ATP is produced during the operation of the ETC is called oxidative phosphorylation.

Accepted Answer

A)   All three statements are true.
B)   Two of the three statements are true.
C)   Only one of the statements is true.
D)   None of the statements is true.E) B) and D)
F) B) and C)

Question 4

Use the following to answer the questions below:
For each of the ETC electron carriers, select the number of ETC protein complexes with which it is associated using the response list. Responses may be used more than once or need not be used at all.

-FADH2

Accepted Answer

A)  one protein complex
B)  two protein complexes
C)  three protein complexes
D)  four protein complexesE) A) and C)
F) B) and C)

Question 5

Use the following to answer the questions below:
For each of the ETC electron carrier characterizations, select the electron carrier's name using the response list. Responses may be used more than once or need not be used at all.

-Interacts with molecular O2

Accepted Answer

A)  CoQ
B)  cyt a3
C)  FMN
D)  FeSPE) A) and D)
F) None of the above

Question 6

Use the following to answer the questions below:
For each of the molecular structural characteristics, select the correct molecule from the response list. Responses may be used more than once or need not be used at all.

-Does not contain a B vitamin as part of its structure

Accepted Answer

A)  translation phase of protein synthesis
B)  transcription phase of protein synthesis
C)  replication of DNA
D)  post-transcription phase of protein synthesisE) A) and B)
F) B) and D)

Question 7

Use the following to answer the questions below:
In each of the following multiple-choice questions, characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices:
-Statements: (1)  Both ribosomes and mitochondria are examples of organelles.
(2)  Cytochromes are heme-containing proteins that can undergo reversible oxidation and reduction.
(3)  The electrons that pass through the various steps of the ETC lose some energy with each transfer along the chain.

Accepted Answer

A)   All three statements are true.
B)   Two of the three statements are true.
C)   Only one of the statements is true.
D)   None of the statements is true.E) B) and C)
F) None of the above

Question 8

Use the following to answer the questions below:
For each of the ETC electron carrier characterizations, select the electron carrier's name using the response list. Responses may be used more than once or need not be used at all.

-Contains Fe and Cu

Accepted Answer

A)  CoQ
B)  cyt a3
C)  FMN
D)  FeSPE) None of the above
F) B) and D)

Question 9

In which two steps of the citric acid cycle are molecules of carbon dioxide produced?

Accepted Answer

A)   steps two and five
B)   steps three and five
C)   steps three and four
D)   steps four and sixE) None of the above
F) A) and B)

Question 10

Use the following to answer the questions below:
For each of the citric acid cycle reactions, select the type of molecules involved (in terms of number of carbon atoms present)  using the response list. Responses may be used more than once or need not be used at all.
-Citrate  isocitrate

Accepted Answer

A)  C6  C6
B)  C6  C5
C)  C5  C4
D)  C4  C4E) A) and D)
F) None of the above

Question 11

Which of the following statements about metabolism is correct?

Accepted Answer

A)   Metabolism is the sum total of all the biochemical reactions that take place in a living organism.
B)   Anabolic reaction sequences usually produce energy.
C)   A metabolic pathway may only be cyclic in which a series of reaction regenerates the first reactant.
D)   The process of polysaccharide digestion is an anabolic process.E) B) and C)
F) A) and B)

Question 12

Which of the following is a correct general description of the reaction that occurs in the first step of the citric acid cycle?

Accepted Answer

A)   C2 + C4  C6
B)   C3 + C3  C6
C)   C2 + C2 + C2  C6
D)   C4 + C4  C6 + C2E) None of the above
F) B) and C)

Question 13

Which of the following substances has two unsubstituted ribose molecules as structural subunits?

Accepted Answer

A)   FADH2
B)   NAD+
C)   CoA
D)   more than one correct response
E)   no correct responseF) B) and E)
G) A) and E)

Question 14

At which protein complex site in the electron transport chain does proton pumping occur?

Accepted Answer

A)   protein complex I
B)   protein complex II
C)   protein complex III
D)   more than one correct response
E)   no correct responseF) B) and C)
G) None of the above

Question 15

In which of the following listings of citric acid cycle intermediates are the compounds listed in the order in which they are encountered in a turn of the cycle?

Accepted Answer

A)   citrate, oxaloacetate, fumarate
B)   isocitrate, succinyl CoA, oxaloacetate
C)   fumarate, malate, alpha-ketoglutarate
D)   oxaloacetate, succinate, citrateE) A) and D)
F) A) and C)

Question 16

How many NADH and FADH2 molecules are produced, respectively, during one turn of the citric acid cycle?

Accepted Answer

A)   two, two
B)   three, one
C)   one, three
D)   two, threeE) B) and D)
F) All of the above

Question 17

Use the following to answer the questions below:
For each of the molecular structural characteristics, select the correct molecule from the response list. Responses may be used more than once or need not be used at all.

-Contains a phosphorylated ribose subunit

Accepted Answer

A)  translation phase of protein synthesis
B)  transcription phase of protein synthesis
C)  replication of DNA
D)  post-transcription phase of protein synthesisE) None of the above
F) A) and B)

Question 18

Which of the following are products of the citric acid cycle?

Accepted Answer

A)   acetyl CoA and NAD+
B)   acetyl CoA and CO2
C)   CO2 and H2O
D)   more than one correct response
E)   no correct responseF) B) and D)
G) B) and C)

Question 19

Which of the following citric acid cycle intermediates is decarboxylated during the operation of the cycle?

Accepted Answer

A)   oxaloacetate
B)   isocitrate
C)   succinate
D)   more than one correct response
E)   no correct responseF) D) and E)
G) A) and D)

Question 20

Use the following to answer the questions below:
For each of the ETC electron carriers, select the number of ETC protein complexes with which it is associated using the response list. Responses may be used more than once or need not be used at all.

-CoQ

Accepted Answer

A)  one protein complex
B)  two protein complexes
C)  three protein complexes
D)  four protein complexesE) None of the above
F) C) and D)

Exam 23: Biochemical Energy Production

How many NADH and FADH₂ molecules are produced, respectively, during one turn of the citric acid cycle?

Correct Answer
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Which of the following substances has two unsubstituted ribose molecules as structural subunits?

Correct Answer
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How many ATP molecules result from the "processing" of 10 acetyl CoA molecule through the common metabolic pathway?

Correct Answer
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Use the following to answer the questions below: For each of the ETC electron carrier characterizations, select the electron carrier's name using the response list. Responses may be used more than once or need not be used at all. -Contains Fe and Cu

Correct Answer
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Which of the following statements about metabolism is correct?

Correct Answer
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Use the following to answer the questions below: For each of the molecular structural characteristics, select the correct molecule from the response list. Responses may be used more than once or need not be used at all. -Does not contain a B vitamin as part of its structure

Correct Answer
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Use the following to answer the questions below: For each of the citric acid cycle reactions, select the type of molecules involved (in terms of number of carbon atoms present) using the response list. Responses may be used more than once or need not be used at all. -Citrate  isocitrate

Correct Answer
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Which of the following are products of the citric acid cycle?

Correct Answer
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At which protein complex site in the electron transport chain does proton pumping occur?

Correct Answer
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Use the following to answer the questions below: For each of the ETC electron carriers, select the number of ETC protein complexes with which it is associated using the response list. Responses may be used more than once or need not be used at all. -CoQ

Correct Answer
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Which of the following is a correct general description of the reaction that occurs in the first step of the citric acid cycle?

Correct Answer
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Use the following to answer the questions below: For each of the ETC electron carriers, select the number of ETC protein complexes with which it is associated using the response list. Responses may be used more than once or need not be used at all. -FADH₂

Correct Answer
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In which two steps of the citric acid cycle are molecules of carbon dioxide produced?

Correct Answer
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Which of the following citric acid cycle intermediates is decarboxylated during the operation of the cycle?

Correct Answer
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Use the following to answer the questions below: For each of the ETC electron carrier characterizations, select the electron carrier's name using the response list. Responses may be used more than once or need not be used at all. -Interacts with molecular O₂

Correct Answer
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Use the following to answer the questions below: For each of the molecular structural characteristics, select the correct molecule from the response list. Responses may be used more than once or need not be used at all. -Contains a phosphorylated ribose subunit

Correct Answer
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In which of the following listings of citric acid cycle intermediates are the compounds listed in the order in which they are encountered in a turn of the cycle?

Correct Answer
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Exam 23: Biochemical Energy Production

How many NADH and FADH2 molecules are produced, respectively, during one turn of the citric acid cycle?

Correct AnswerverifiedShow Answer

Which of the following substances has two unsubstituted ribose molecules as structural subunits?

Correct AnswerverifiedShow Answer

How many ATP molecules result from the "processing" of 10 acetyl CoA molecule through the common metabolic pathway?

Correct AnswerverifiedShow Answer

Use the following to answer the questions below: For each of the ETC electron carrier characterizations, select the electron carrier's name using the response list. Responses may be used more than once or need not be used at all. -Contains Fe and Cu

Correct AnswerverifiedShow Answer

Which of the following statements about metabolism is correct?

Correct AnswerverifiedShow Answer

Use the following to answer the questions below: For each of the molecular structural characteristics, select the correct molecule from the response list. Responses may be used more than once or need not be used at all. -Does not contain a B vitamin as part of its structure

Correct AnswerverifiedShow Answer

Use the following to answer the questions below: For each of the citric acid cycle reactions, select the type of molecules involved (in terms of number of carbon atoms present) using the response list. Responses may be used more than once or need not be used at all. -Citrate  isocitrate

Correct AnswerverifiedShow Answer

Which of the following are products of the citric acid cycle?

Correct AnswerverifiedShow Answer

At which protein complex site in the electron transport chain does proton pumping occur?

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Use the following to answer the questions below: For each of the ETC electron carriers, select the number of ETC protein complexes with which it is associated using the response list. Responses may be used more than once or need not be used at all. -CoQ

Correct AnswerverifiedShow Answer

Which of the following is a correct general description of the reaction that occurs in the first step of the citric acid cycle?

Correct AnswerverifiedShow Answer

Use the following to answer the questions below: For each of the ETC electron carriers, select the number of ETC protein complexes with which it is associated using the response list. Responses may be used more than once or need not be used at all. -FADH2

Correct AnswerverifiedShow Answer

In which two steps of the citric acid cycle are molecules of carbon dioxide produced?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which of the following citric acid cycle intermediates is decarboxylated during the operation of the cycle?

Correct AnswerverifiedShow Answer

Use the following to answer the questions below: For each of the ETC electron carrier characterizations, select the electron carrier's name using the response list. Responses may be used more than once or need not be used at all. -Interacts with molecular O2

Correct AnswerverifiedShow Answer

Use the following to answer the questions below: For each of the molecular structural characteristics, select the correct molecule from the response list. Responses may be used more than once or need not be used at all. -Contains a phosphorylated ribose subunit

Correct AnswerverifiedShow Answer

In which of the following listings of citric acid cycle intermediates are the compounds listed in the order in which they are encountered in a turn of the cycle?

Correct AnswerverifiedShow Answer

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Correct AnswerverifiedShow Answer

How many NADH and FADH₂ molecules are produced, respectively, during one turn of the citric acid cycle?

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Use the following to answer the questions below: For each of the ETC electron carriers, select the number of ETC protein complexes with which it is associated using the response list. Responses may be used more than once or need not be used at all. -FADH₂

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Use the following to answer the questions below: For each of the ETC electron carrier characterizations, select the electron carrier's name using the response list. Responses may be used more than once or need not be used at all. -Interacts with molecular O₂

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