Question 1

Examine the following figure.  
-Which of the following is true of acetyl coenzyme A?

Accepted Answer

A)  This compound provides entry for fatty acids into the citric acid cycle. 
B)  This compound provides entry for amino acids into the citric acid cycle. 
C)  This compound provides entry for monosaccharides into the citric acid cycle. 
D)  All of the above are true of acetyl coenzyme A. 
A)  This compound provides entry for fatty acids into the citric acid cycle. 
B)  This compound provides entry for amino acids into the citric acid cycle. 
C)  This compound provides entry for monosaccharides into the citric acid cycle. 
D)  All of the above are true of acetyl coenzyme A. D

Question 2

Where in the proton-translocating ATPase is ATP synthesized?

Accepted Answer

A)  in F0 
B)  in F1 
C)  in both F0 and F1 
D)  in neither F0 nor F1 
A)  in F0 
B)  in F1 
C)  in both F0 and F1 
D)  in neither F0 nor F1 B

Question 3

Approximately what mass of ATP is required to raise the temperature of a person weighing 60 kg from room temperature, 25°C, to normal body temperature, 37°C?

Accepted Answer

A)  25 kg 
B)  50 kg 
C)  75 kg 
D)  100 kg 
A)  25 kg 
B)  50 kg 
C)  75 kg 
D)  100 kg B

Question 4

Which part of metabolism involves the synthesis of molecules?

Accepted Answer

A)  anabolism 
B)  catabolism 
C)  both a and b 
D)  neither a and b 
A)  anabolism 
B)  catabolism 
C)  both a and b 
D)  neither a and b

Question 5

Where in the mitochondrion is proton-translocating ATPase located?

Accepted Answer

A)  in the intermembrane space 
B)  in the matrix 
C)  on the inner membrane 
D)  on the outer membrane 
A)  in the intermembrane space 
B)  in the matrix 
C)  on the inner membrane 
D)  on the outer membrane

Question 6

What type of reaction occurs when citryl CoA is converted to citrate in step 1 of the citric acid cycle?

Accepted Answer

A)  hydrolysis 
B)  ionization 
C)  reduction 
D)  oxidation 
A)  hydrolysis 
B)  ionization 
C)  reduction 
D)  oxidation

Question 7

Which of the following species is transported by CoA?

Accepted Answer

A)  CH3O− 
B)  CH3CO− 
C)  CH3COO− 
D)  C2H3O2− 
A)  CH3O− 
B)  CH3CO− 
C)  CH3COO− 
D)  C2H3O2−

Question 8

How many electrons are consumed when H+ and O2 combine to produce two molecules of water?

Accepted Answer

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

Question 9

The combined processes of electron and H+ transport and subsequent ATP synthesis is called which of the following?

Accepted Answer

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

Question 10

How many molecules of NADH are obtained for each C2 fragment which enters the common catabolic pathway?

Accepted Answer

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

Question 11

The NAD+/NAD and FAD/FADH2 systems transport which of the following?

Accepted Answer

A)  electrons 
B)  hydrogen ions 
C)  both a and b 
D)  neither a nor b 
A)  electrons 
B)  hydrogen ions 
C)  both a and b 
D)  neither a nor b

Question 12

Which of the following is the oxidizing agent in the reaction which converts malate to oxaloacetate?

Accepted Answer

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

Question 13

Which of the following enzymes is usually not found in the mitochondria?

Accepted Answer

A)  cytochrome a 
B)  cytochrome b 
C)  cytochrome c 
D)  cytochrome P-450 
A)  cytochrome a 
B)  cytochrome b 
C)  cytochrome c 
D)  cytochrome P-450

Question 14

Examine the following figure.  
-Which numbered structure represents the location of the enzymes of the citric acid cycles?

Accepted Answer

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

Question 15

Enzymes associated with which of the following are localized in the mitochondrial matrix?

Accepted Answer

A)  the citric acid cycle 
B)  oxidative phosphorylation 
C)  both a and b 
D)  neither a nor b 
A)  the citric acid cycle 
B)  oxidative phosphorylation 
C)  both a and b 
D)  neither a nor b

Question 16

The cytochromes found in complex III of the electron and H+ transport chain all contain a heme group. In the these heme groups an iron atom is bound to which of the following?

Accepted Answer

A)  two nitrogen atoms 
B)  two sulfur atoms 
C)  four nitrogen atoms 
D)  four sulfur atoms 
A)  two nitrogen atoms 
B)  two sulfur atoms 
C)  four nitrogen atoms 
D)  four sulfur atoms

Question 17

Oxidative phosphorylation results in the production of how many molecules of ATP for each FADH2 consumed?

Accepted Answer

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

Question 18

Which portion of the proton-translocating ATPase is embedded in the inner membrane of the mitochondria?

Accepted Answer

A)  F0 
B)  F1 
C)  both F0 and F1 
D)  neither F0 nor F1 
A)  F0 
B)  F1 
C)  both F0 and F1 
D)  neither F0 nor F1

Question 19

Activation of the enzyme phosphorylase b requires the transfer of a phosphate to which amino acid residue of the enzyme?

Accepted Answer

A)  alanine 
B)  cysteine 
C)  serine 
D)  tryptophan 
A)  alanine 
B)  cysteine 
C)  serine 
D)  tryptophan

Question 20

Which of the following electron carriers transports electrons from complex I to complex II to complex III of the electron and H+ transport chain?

Accepted Answer

A)  CoQ 
B)  cytochrome a 
C)  cytochrome b 
D)  cytochrome c 
A)  CoQ 
B)  cytochrome a 
C)  cytochrome b 
D)  cytochrome c

Exam 27: Bioenergetics: How the Body Converts Food to Energy

Examine the following figure. -Which of the following is true of acetyl coenzyme A?

Where in the proton-translocating ATPase is ATP synthesized?

Approximately what mass of ATP is required to raise the temperature of a person weighing 60 kg from room temperature, 25°C, to normal body temperature, 37°C?

Which part of metabolism involves the synthesis of molecules?

Where in the mitochondrion is proton-translocating ATPase located?

What type of reaction occurs when citryl CoA is converted to citrate in step 1 of the citric acid cycle?

Which of the following species is transported by CoA?

How many electrons are consumed when H+ and O2 combine to produce two molecules of water?

The combined processes of electron and H+ transport and subsequent ATP synthesis is called which of the following?

How many molecules of NADH are obtained for each C2 fragment which enters the common catabolic pathway?

The NAD+/NAD and FAD/FADH2 systems transport which of the following?

Which of the following is the oxidizing agent in the reaction which converts malate to oxaloacetate?

Which of the following enzymes is usually not found in the mitochondria?

Examine the following figure. -Which numbered structure represents the location of the enzymes of the citric acid cycles?

Enzymes associated with which of the following are localized in the mitochondrial matrix?

The cytochromes found in complex III of the electron and H+ transport chain all contain a heme group. In the these heme groups an iron atom is bound to which of the following?

Oxidative phosphorylation results in the production of how many molecules of ATP for each FADH2 consumed?

Which portion of the proton-translocating ATPase is embedded in the inner membrane of the mitochondria?

Activation of the enzyme phosphorylase b requires the transfer of a phosphate to which amino acid residue of the enzyme?

Which of the following electron carriers transports electrons from complex I to complex II to complex III of the electron and H+ transport chain?

Matter, Energy, and Measurement

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Chirality: the Handedness of Molecules

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How many electrons are consumed when H⁺ and O₂ combine to produce two molecules of water?

The combined processes of electron and H⁺ transport and subsequent ATP synthesis is called which of the following?

How many molecules of NADH are obtained for each C₂ fragment which enters the common catabolic pathway?

The NAD⁺/NAD and FAD/FADH₂ systems transport which of the following?

The cytochromes found in complex III of the electron and H⁺ transport chain all contain a heme group. In the these heme groups an iron atom is bound to which of the following?

Oxidative phosphorylation results in the production of how many molecules of ATP for each FADH₂ consumed?

Which of the following electron carriers transports electrons from complex I to complex II to complex III of the electron and H⁺ transport chain?