Question 1

In AMP, ADP and ATP the phosphate is linked to ribose through which carbon atom?

Accepted Answer

A)  C-1 
B)  C-2 
C)  C-3 
D)  C-5 
A)  C-1 
B)  C-2 
C)  C-3 
D)  C-5

Question 2

How many molecules of NADH are produced by one pass through the citric acid cycle?

Accepted Answer

A)  0 
B)  1 
C)  2 
D)  3 
A)  0 
B)  1 
C)  2 
D)  3

Question 3

What type of reaction occurs when isocitrate is converted to oxalosuccinate in step 3 of the citric acid cycle?

Accepted Answer

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

Question 4

Examine the following figure.  
-Examine the structures of following two compounds. Each shows the biologically operative part of the molecule.     Which of the following does not correctly characterizes both compounds

Accepted Answer

A)  Both require two electrons for reduction. 
B)  Both require two hydrogen ions for reduction. 
C)  Both compounds upon reduction produce electron-transporting molecules. 
D)  Both are classified as coenzymes. 
E)  All of the above are correct for both compounds. 
A)  Both require two electrons for reduction. 
B)  Both require two hydrogen ions for reduction. 
C)  Both compounds upon reduction produce electron-transporting molecules. 
D)  Both are classified as coenzymes. 
E)  All of the above are correct for both compounds.

Question 5

How many molecules of FADH2 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 6

How many protons are required for the conversion of ADP to ATP?

Accepted Answer

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

Question 7

Which portions of the citric acid cycle produce most of the energy generated by the cycle?

Accepted Answer

A)  formation of GTP 
B)  hydrolysis of GDP 
C)  oxidation of FADH2 and NADH 
D)  reduction of FAD and NAD+ 
A)  formation of GTP 
B)  hydrolysis of GDP 
C)  oxidation of FADH2 and NADH 
D)  reduction of FAD and NAD+

Question 8

How many subunits make up complex III of the electron and H+ transport chain?

Accepted Answer

A)  6 
B)  11 
C)  13 
D)  21 
A)  6 
B)  11 
C)  13 
D)  21

Question 9

In AMP, ADP and ATP, what type of linkage connects the phosphate to the sugar?

Accepted Answer

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

Question 10

Which of the following is true of anabolism?

Accepted Answer

A)  It is endothermic. 
B)  It is exothermic. 
C)  It can be either endothermic or exothermic. 
D)  It is neither endothermic nor exothermic. 
A)  It is endothermic. 
B)  It is exothermic. 
C)  It can be either endothermic or exothermic. 
D)  It is neither endothermic nor exothermic.

Question 11

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

Accepted Answer

A)  1 
B)  2 
C)  9 
D)  12 
A)  1 
B)  2 
C)  9 
D)  12

Question 12

The catabolism of carbohydrates or lipids produces smaller species which then enter the citric acid cycle. How many carbon atoms are in these smaller species?

Accepted Answer

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

Question 13

Approximately how much energy is released by the hydrolysis of one mole of ATP to AMP?

Accepted Answer

A)  3.4 kcal 
B)  7.3 kcal 
C)  10.7 kcal 
D)  14.6 kcal 
A)  3.4 kcal 
B)  7.3 kcal 
C)  10.7 kcal 
D)  14.6 kcal

Question 14

Which of the following is the oxidizing agent in the reaction which converts succinate to fumarate?

Accepted Answer

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

Question 15

Complex I of the electron and H+ transport chain contains a number of clusters made up of a metal and a nonmetal. Which atoms 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 16

Which metal is found in complex II of the electron and H+ transport chain?

Accepted Answer

A)  Ca 
B)  Co 
C)  Fe 
D)  none of these 
A)  Ca 
B)  Co 
C)  Fe 
D)  none of these

Question 17

In AMP, ADP and ATP the adenine is linked to ribose through which carbon atom?

Accepted Answer

A)  C-1 
B)  C-2 
C)  C-3 
D)  C-5 
A)  C-1 
B)  C-2 
C)  C-3 
D)  C-5

Question 18

Which of the following is true of the catabolic pathways for carbohydrates, lipids and proteins?

Accepted Answer

A)  Each type of compound has its own distinct pathway. 
B)  Carbohydrates and lipids share a common pathway. 
C)  Carbohydrates and proteins share a common pathway. 
D)  Lipids and proteins share a common pathway. 
A)  Each type of compound has its own distinct pathway. 
B)  Carbohydrates and lipids share a common pathway. 
C)  Carbohydrates and proteins share a common pathway. 
D)  Lipids and proteins share a common pathway.

Question 19

The citric acid cycle includes which of the following?

Accepted Answer

A)  the electron transport chain 
B)  the oxidative phosphorylation pathway 
C)  both a and b 
D)  neither a nor b 
A)  the electron transport chain 
B)  the oxidative phosphorylation pathway 
C)  both a and b 
D)  neither a nor b

Question 20

Where are the enzymes which promote the reaction 4H+ + 4e− + O2 → 2H2O located?

Accepted Answer

A)  in the cytoplasm 
B)  embedded in the inner membrane of the mitochondria 
C)  embedded in the outer membrane of the mitochondria 
D)  embedded in the matrix 
A)  in the cytoplasm 
B)  embedded in the inner membrane of the mitochondria 
C)  embedded in the outer membrane of the mitochondria 
D)  embedded in the matrix

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

In AMP, ADP and ATP the phosphate is linked to ribose through which carbon atom?

How many molecules of NADH are produced by one pass through the citric acid cycle?

What type of reaction occurs when isocitrate is converted to oxalosuccinate in step 3 of the citric acid cycle?

Examine the following figure. -Examine the structures of following two compounds. Each shows the biologically operative part of the molecule. Which of the following does not correctly characterizes both compounds

How many molecules of FADH2 are obtained for each C2 fragment which enters the common catabolic pathway?

How many protons are required for the conversion of ADP to ATP?

Which portions of the citric acid cycle produce most of the energy generated by the cycle?

How many subunits make up complex III of the electron and H+ transport chain?

In AMP, ADP and ATP, what type of linkage connects the phosphate to the sugar?

Which of the following is true of anabolism?

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

The catabolism of carbohydrates or lipids produces smaller species which then enter the citric acid cycle. How many carbon atoms are in these smaller species?

Approximately how much energy is released by the hydrolysis of one mole of ATP to AMP?

Which of the following is the oxidizing agent in the reaction which converts succinate to fumarate?

Complex I of the electron and H+ transport chain contains a number of clusters made up of a metal and a nonmetal. Which atoms are found in these clusters?

Which metal is found in complex II of the electron and H+ transport chain?

In AMP, ADP and ATP the adenine is linked to ribose through which carbon atom?

Which of the following is true of the catabolic pathways for carbohydrates, lipids and proteins?

The citric acid cycle includes which of the following?

Where are the enzymes which promote the reaction 4H+ + 4e− + O2 → 2H2O located?

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How many molecules of FADH₂ are obtained for each C₂ fragment which enters the common catabolic pathway?

How many subunits make up complex III of the electron and H⁺ transport chain?

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

Complex I of the electron and H⁺ transport chain contains a number of clusters made up of a metal and a nonmetal. Which atoms are found in these clusters?

Which metal is found in complex II of the electron and H⁺ transport chain?

Where are the enzymes which promote the reaction 4H⁺ + 4e− + O₂ → 2H₂O located?