Question 1

Which of the following species are transported by NAD+ and FAD coenzymes?

Accepted Answer

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

Question 2

How many molecules of CO2 are released at the end of the citric acid cycle?

Accepted Answer

A)  one 
B)  two 
C)  three 
D)  four 
A)  one 
B)  two 
C)  three 
D)  four B

Question 3

Which part of the mitochondria contains the enzymes associated with the citric acid cycle?

Accepted Answer

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

Question 4

Which of the following statements is true of the energy-conversion pathways for carbohydrates, lipids, and proteins?

Accepted Answer

A)  Each of these compounds have their own energy-conversion pathways. 
B)  Carbohydrates and lipids share a common energy-conversion pathway. 
C)  Carbohydrates and proteins share a common energy-conversion pathway. 
D)  Lipids and proteins share a common energy-conversion pathway. 
A)  Each of these compounds have their own energy-conversion pathways. 
B)  Carbohydrates and lipids share a common energy-conversion pathway. 
C)  Carbohydrates and proteins share a common energy-conversion pathway. 
D)  Lipids and proteins share a common energy-conversion pathway.

Question 5

Which part of a mitochondrion contains the enzymes that catalyze the following exothermic reaction: 4H+ + 4e− + O2 → 2H2O?

Accepted Answer

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

Question 6

Which of the following reactions in the citric acid cycle produces the most energy?

Accepted Answer

A)  the formation of GTP 
B)  the hydrolysis of GDP 
C)  the oxidation of FADH2 
D)  the reduction of NAD+ 
A)  the formation of GTP 
B)  the hydrolysis of GDP 
C)  the oxidation of FADH2 
D)  the reduction of NAD+

Question 7

How many proton channels are present in complex III of the electron and H+ transport chain?

Accepted Answer

A)  one 
B)  two 
C)  three 
D)  four 
A)  one 
B)  two 
C)  three 
D)  four

Question 8

Which metal is found in the heme group of cytochrome a3?

Accepted Answer

A)  copper 
B)  cobalt 
C)  chromium 
D)  none of these 
A)  copper 
B)  cobalt 
C)  chromium 
D)  none of these

Question 9

Examine the given diagram of a cell organelle. Which numbered structure in the given diagram represents a membrane that is permeable to ions and small molecules and does not have transporting membrane proteins?

Accepted Answer

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

Question 10

Which of the following reactions occurs during the conversion of isocitrate to oxalosuccinate in the citric acid cycle?

Accepted Answer

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

Question 11

Identify the operative part of the coenzyme NAD+.

Accepted Answer

A)  adenine 
B)  ribose 
C)  nicotinamide 
D)  flavin 
A)  adenine 
B)  ribose 
C)  nicotinamide 
D)  flavin

Question 12

Which of the following electron carriers carries electrons from complex III to complex IV 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

Question 13

Which of the following organelles package and process proteins for secretion and delivery to other cellular compartments?

Accepted Answer

A)  Golgi bodies 
B)  lysosomes 
C)  mitochondria 
D)  smooth endoplasmic reticuli 
A)  Golgi bodies 
B)  lysosomes 
C)  mitochondria 
D)  smooth endoplasmic reticuli

Question 14

The reduced coenzymes NADH and FADH2 provide hydrogen ions and electrons for the following reaction: 4H+ + 4e− + O2 → 2H2O. Which of the following statements is true of this reaction?

Accepted Answer

A)  It is an endothermic reaction wherein two electrons are consumed. 
B)  It is an exothermic reaction wherein two electrons are consumed. 
C)  It is an endothermic reaction wherein four electrons are consumed. 
D)  It is an exothermic reaction wherein four electrons are consumed. 
A)  It is an endothermic reaction wherein two electrons are consumed. 
B)  It is an exothermic reaction wherein two electrons are consumed. 
C)  It is an endothermic reaction wherein four electrons are consumed. 
D)  It is an exothermic reaction wherein four electrons are consumed.

Question 15

Assuming the specific heat of the body is same as that of water, how much ATP is required to raise the body temperature of a person who weighs 60 kg from 25°C to 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

Question 16

Which of the following bonds is found between adenine and ribose in an ATP molecule?

Accepted Answer

A)  a β-N-glycosidic bond 
B)  a β-N-fructosidic bond 
C)  an α-N-glycosidic bond 
D)  an α-N-fructosidic bond 
A)  a β-N-glycosidic bond 
B)  a β-N-fructosidic bond 
C)  an α-N-glycosidic bond 
D)  an α-N-fructosidic bond

Question 17

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

Accepted Answer

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

Question 18

Which of the following statements is true of the activation of PFK-2?

Accepted Answer

A)  It involves the utilization of the chemical energy of ATP to activate PFK-2. 
B)  It involves the utilization of the chemical energy of GTP to activate PFK-2. 
C)  It is a spontaneous process and does not require external energy. 
D)  It is a nonspontaneous process and does not require external energy. 
A)  It involves the utilization of the chemical energy of ATP to activate PFK-2. 
B)  It involves the utilization of the chemical energy of GTP to activate PFK-2. 
C)  It is a spontaneous process and does not require external energy. 
D)  It is a nonspontaneous process and does not require external energy.

Question 19

In which of the following organelles does the common catabolic pathway take place in higher organisms?

Accepted Answer

A)  Golgi bodies 
B)  lysosomes 
C)  mitochondria 
D)  smooth endoplasmic reticuli 
A)  Golgi bodies 
B)  lysosomes 
C)  mitochondria 
D)  smooth endoplasmic reticuli

Question 20

Which of the following pathways is a part of the common catabolic pathway?

Accepted Answer

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

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

Which of the following species are transported by NAD+ and FAD coenzymes?

How many molecules of CO2 are released at the end of the citric acid cycle?

Which part of the mitochondria contains the enzymes associated with the citric acid cycle?

Which of the following statements is true of the energy-conversion pathways for carbohydrates, lipids, and proteins?

Which part of a mitochondrion contains the enzymes that catalyze the following exothermic reaction: 4H+ + 4e− + O2 → 2H2O?

Which of the following reactions in the citric acid cycle produces the most energy?

How many proton channels are present in complex III of the electron and H+ transport chain?

Which metal is found in the heme group of cytochrome a3?

Examine the given diagram of a cell organelle. Which numbered structure in the given diagram represents a membrane that is permeable to ions and small molecules and does not have transporting membrane proteins?

Which of the following reactions occurs during the conversion of isocitrate to oxalosuccinate in the citric acid cycle?

Identify the operative part of the coenzyme NAD+.

Which of the following electron carriers carries electrons from complex III to complex IV of the electron and H+ transport chain?

Which of the following organelles package and process proteins for secretion and delivery to other cellular compartments?

The reduced coenzymes NADH and FADH2 provide hydrogen ions and electrons for the following reaction: 4H+ + 4e− + O2 → 2H2O. Which of the following statements is true of this reaction?

Assuming the specific heat of the body is same as that of water, how much ATP is required to raise the body temperature of a person who weighs 60 kg from 25°C to 37°C?

Which of the following bonds is found between adenine and ribose in an ATP molecule?

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

Which of the following statements is true of the activation of PFK-2?

In which of the following organelles does the common catabolic pathway take place in higher organisms?

Which of the following pathways is a part of the common catabolic pathway?

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 species are transported by NAD⁺ and FAD coenzymes?

How many molecules of CO₂ are released at the end of the citric acid cycle?

Which part of a mitochondrion contains the enzymes that catalyze the following exothermic reaction: 4H⁺ + 4e⁻ + O₂ → 2H₂O?

How many proton channels are present in complex III of the electron and H⁺ transport chain?

Which metal is found in the heme group of cytochrome a₃?

Identify the operative part of the coenzyme NAD⁺.

Which of the following electron carriers carries electrons from complex III to complex IV of the electron and H⁺ transport chain?

The reduced coenzymes NADH and FADH2 provide hydrogen ions and electrons for the following reaction: 4H⁺ + 4e⁻ + O₂ → 2H₂O. Which of the following statements is true of this reaction?

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