Question 1

Which process does NOT occur during the citric acid cycle?

Accepted Answer

A)  ADP is phosphorylated to make ATP. 
B)  NAD+ is reduced to NADH. 
C)  FAD is reduced to FADH2. 
D)  GDP is phosphorylated to make GTP. 
E)  CO2 is released. 
A)  ADP is phosphorylated to make ATP. 
B)  NAD+ is reduced to NADH. 
C)  FAD is reduced to FADH2. 
D)  GDP is phosphorylated to make GTP. 
E)  CO2 is released.

Question 2

The first stage of catabolism is commonly referred to as_________.

Accepted Answer

A)  metabolism 
B)  respiration 
C)  catalysis 
D)  transport 
E)  digestion 
A)  metabolism 
B)  respiration 
C)  catalysis 
D)  transport 
E)  digestion

Question 3

The following is step 8 of the citric acid cycle.During this step, NAD+ is ________ while L-malate is ________.

Accepted Answer

A)  phosphorylated; isomerized 
B)  isomerized; dehydrated 
C)  oxidized; reduced 
D)  reduced; oxidized 
E)  hydrated; dehydrated 
A)  phosphorylated; isomerized 
B)  isomerized; dehydrated 
C)  oxidized; reduced 
D)  reduced; oxidized 
E)  hydrated; dehydrated

Question 4

What is the product of hydrolysis of a triglyceride in the first step of catabolism?

Accepted Answer

A)  one molecule of glycerol and three fatty acid molecules 
B)  one molecule of glycerol and one fatty acid 
C)  three glucose molecules 
D)  glucose, fatty acids, and glycerol 
E)  Triglycerides do not undergo hydrolysis during catabolism. 
A)  one molecule of glycerol and three fatty acid molecules 
B)  one molecule of glycerol and one fatty acid 
C)  three glucose molecules 
D)  glucose, fatty acids, and glycerol 
E)  Triglycerides do not undergo hydrolysis during catabolism.

Question 5

Under what circumstances are amino acids metabolized?

Accepted Answer

A)  They are metabolized during starvation. 
B)  All dietary amino acids are metabolized. 
C)  Essential amino acids are always metabolized. 
D)  Proteins are not hydrolyzed into proteins under any circumstance. 
E)  They are metabolized under anaerobic conditions. 
A)  They are metabolized during starvation. 
B)  All dietary amino acids are metabolized. 
C)  Essential amino acids are always metabolized. 
D)  Proteins are not hydrolyzed into proteins under any circumstance. 
E)  They are metabolized under anaerobic conditions.

Question 6

The third step of β-oxidation is shown below.What type of reaction is this?

Accepted Answer

A)  oxidation 
B)  reduction 
C)  hydration 
D)  hydrolysis 
E)  hydrogenation 
A)  oxidation 
B)  reduction 
C)  hydration 
D)  hydrolysis 
E)  hydrogenation

Question 7

Mitochondria are a type of ______________.

Accepted Answer

A)  enzyme 
B)  lipid 
C)  biomolecule 
D)  organ 
E)  organelle 
A)  enzyme 
B)  lipid 
C)  biomolecule 
D)  organ 
E)  organelle

Question 8

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 9

What is the role of coenzyme Q and cytochrome c in the electron transport chain?

Accepted Answer

A)  They pump protons from the matrix to the intermembrane space. 
B)  They pump protons from the intermembrane space to the matrix. 
C)  The carry coenzymes from one protein complex to the next protein complex. 
D)  They carry electrons from one protein complex to the next protein complex. 
E)  They carry small ions from one protein complex to the next protein complex. 
A)  They pump protons from the matrix to the intermembrane space. 
B)  They pump protons from the intermembrane space to the matrix. 
C)  The carry coenzymes from one protein complex to the next protein complex. 
D)  They carry electrons from one protein complex to the next protein complex. 
E)  They carry small ions from one protein complex to the next protein complex.

Question 10

Acetyl coenzyme A is shown below.Which part of acetyl-CoA is transferred to an alcohol or thiol during metabolism?

Accepted Answer

A)  I only 
B)  I and II only 
C)  I, II, and III 
D)  IV only 
E)  IV and III 
A)  I only 
B)  I and II only 
C)  I, II, and III 
D)  IV only 
E)  IV and III

Question 11

As a monosaccharide goes through glycolysis, it must stay within the cell.How are the starting monosaccharides and all of the intermediates of glycolysis kept within the cell during glycolysis?

Accepted Answer

A)  Nothing needs to be done to them; the molecules just stay in the cell. 
B)  The hydroxyl groups lose their protons and become negatively charged. 
C)  The molecules are phosphorylated. 
D)  The molecules attach to enzymes in the cytoplasm. 
E)  All of the above can occur. 
A)  Nothing needs to be done to them; the molecules just stay in the cell. 
B)  The hydroxyl groups lose their protons and become negatively charged. 
C)  The molecules are phosphorylated. 
D)  The molecules attach to enzymes in the cytoplasm. 
E)  All of the above can occur.

Question 12

Which statement about obstacles to weight loss is FALSE?

Accepted Answer

A)  There is only one major biochemical pathway to produce glucose from fat. 
B)  The body converts protein to glucose, not fat to glucose, when glycogen is depleted. 
C)  Carbohydrate consumption halts all weight loss. 
D)  Hunger sensations occur when glucose levels drops. 
E)  A person's metabolism will slow to adjust to a calorie deficit. 
A)  There is only one major biochemical pathway to produce glucose from fat. 
B)  The body converts protein to glucose, not fat to glucose, when glycogen is depleted. 
C)  Carbohydrate consumption halts all weight loss. 
D)  Hunger sensations occur when glucose levels drops. 
E)  A person's metabolism will slow to adjust to a calorie deficit.

Question 13

What is the general order in which electrons pass through the electron transport chain?

Accepted Answer

A)  from lowest electron affinity to highest electron affinity 
B)  from highest electron affinity to lowest electron affinity 
C)  from most reactive to least reactive 
D)  form strongest acid to weakest acid 
E)  from most mobile to least mobile 
A)  from lowest electron affinity to highest electron affinity 
B)  from highest electron affinity to lowest electron affinity 
C)  from most reactive to least reactive 
D)  form strongest acid to weakest acid 
E)  from most mobile to least mobile

Question 14

Which statement BEST describes the body's purpose in making lactic acid from pyruvate?

Accepted Answer

A)  to cause "the burn" during strenuous exercise 
B)  to raise the pH of the immediate environment 
C)  to produce NAD+ for use in glycolysis 
D)  to produce FADH2 for use in glycolysis 
E)  to regenerate ADP 
A)  to cause "the burn" during strenuous exercise 
B)  to raise the pH of the immediate environment 
C)  to produce NAD+ for use in glycolysis 
D)  to produce FADH2 for use in glycolysis 
E)  to regenerate ADP

Question 15

Which of the following choices is the key outcome of the citric acid cycle?

Accepted Answer

A)  Oxygen is consumed. 
B)  Carbon dioxide is released. 
C)  Biomolecules are catabolized. 
D)  FAD and NAD+ are reduced. 
E)  ADP is phosphorylated. 
A)  Oxygen is consumed. 
B)  Carbon dioxide is released. 
C)  Biomolecules are catabolized. 
D)  FAD and NAD+ are reduced. 
E)  ADP is phosphorylated.

Question 16

The partial structures of the coenzymes NADH and NAD+ are shown below.What type of reaction does NADH undergo to form NAD+?

Accepted Answer

A)  oxidation 
B)  reduction 
C)  acid-base 
D)  hydrolysis 
E)  condensation 
A)  oxidation 
B)  reduction 
C)  acid-base 
D)  hydrolysis 
E)  condensation

Question 17

The first step of glycolysis is phosphorylating glucose to make glucose 6-phosphate as shown below.Which of the following statements about this reaction is TRUE? Glucose + Pi → Glucose 6-phosphate + H2O ΔG = + 3.3 kcal/mol

Accepted Answer

A)  This reaction releases energy. 
B)  This reaction is energetically downhill. 
C)  This reaction cannot occur in the body. 
D)  This reaction must be coupled to another reaction to occur. 
E)  An enzyme is required to provide the energy for this reaction. 
A)  This reaction releases energy. 
B)  This reaction is energetically downhill. 
C)  This reaction cannot occur in the body. 
D)  This reaction must be coupled to another reaction to occur. 
E)  An enzyme is required to provide the energy for this reaction.

Question 18

What type of reaction occurs in the electron transport chain?

Accepted Answer

A)  protonation-deprotonation 
B)  hydration-dehydration 
C)  oxidation-reduction 
D)  isomerization 
E)  phosphorylation-dephosphorylation 
A)  protonation-deprotonation 
B)  hydration-dehydration 
C)  oxidation-reduction 
D)  isomerization 
E)  phosphorylation-dephosphorylation

Question 19

The ATP produced by cellular respiration is used in the process of _____________.

Accepted Answer

A)  building proteins 
B)  synthesizing DNA 
C)  moving muscles 
D)  pumping ions across membranes 
E)  All of the above are correct. 
A)  building proteins 
B)  synthesizing DNA 
C)  moving muscles 
D)  pumping ions across membranes 
E)  All of the above are correct.

Question 20

Which process does NOT occur in the mitochondria?

Accepted Answer

A)  β-oxidation 
B)  citric acid cycle 
C)  oxidative phosphorylation 
D)  glycolysis 
E)  All of these occur in the mitochondria. 
A)  β-oxidation 
B)  citric acid cycle 
C)  oxidative phosphorylation 
D)  glycolysis 
E)  All of these occur in the mitochondria.

Which process does NOT occur during the citric acid cycle?

The first stage of catabolism is commonly referred to as_________.

The following is step 8 of the citric acid cycle.During this step, NAD⁺ is while L-malate is .

What is the product of hydrolysis of a triglyceride in the first step of catabolism?

Under what circumstances are amino acids metabolized?

The third step of β-oxidation is shown below.What type of reaction is this?

Mitochondria are a type of ______________.

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

What is the role of coenzyme Q and cytochrome c in the electron transport chain?

Acetyl coenzyme A is shown below.Which part of acetyl-CoA is transferred to an alcohol or thiol during metabolism?

As a monosaccharide goes through glycolysis, it must stay within the cell.How are the starting monosaccharides and all of the intermediates of glycolysis kept within the cell during glycolysis?

Which statement about obstacles to weight loss is FALSE?

What is the general order in which electrons pass through the electron transport chain?

Which statement BEST describes the body's purpose in making lactic acid from pyruvate?

Which of the following choices is the key outcome of the citric acid cycle?

The partial structures of the coenzymes NADH and NAD⁺ are shown below.What type of reaction does NADH undergo to form NAD⁺?

The first step of glycolysis is phosphorylating glucose to make glucose 6-phosphate as shown below.Which of the following statements about this reaction is TRUE? Glucose + P_i → Glucose 6-phosphate + H₂O ΔG = + 3.3 kcal/mol

What type of reaction occurs in the electron transport chain?

The ATP produced by cellular respiration is used in the process of _____________.

Which process does NOT occur in the mitochondria?

Matter, Energy, and Measurement

Atomic Structure and Radioisotopes

Ionic and Covalent Compounds

Molecular Geometry, Polarity, and Intermolecular

Chemical Quantities and Introduction to Reactions

Chemical Reactions: Energy, Rates, and Equilibrium

Changes of State and Gas Laws

Mixtures, Solution Concentrations, and Diffusion

Acids and Bases, Ph, and Buffers

Introduction to Organic Chemistry:

Alcohols, Phenols, Thiols, Ethers, and Amines

The Carbonyl Containing Functional Groups

The Common Organic Reactions in Biochemistry

Carbohydrates: Structure and Function

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Exam 18: Energy and Metabolism

Which process does NOT occur during the citric acid cycle?

The first stage of catabolism is commonly referred to as_________.

The following is step 8 of the citric acid cycle.During this step, NAD+ is ________ while L-malate is ________.

What is the product of hydrolysis of a triglyceride in the first step of catabolism?

Under what circumstances are amino acids metabolized?

The third step of β-oxidation is shown below.What type of reaction is this?

Mitochondria are a type of ______________.

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

What is the role of coenzyme Q and cytochrome c in the electron transport chain?

Acetyl coenzyme A is shown below.Which part of acetyl-CoA is transferred to an alcohol or thiol during metabolism?

As a monosaccharide goes through glycolysis, it must stay within the cell.How are the starting monosaccharides and all of the intermediates of glycolysis kept within the cell during glycolysis?

Which statement about obstacles to weight loss is FALSE?

What is the general order in which electrons pass through the electron transport chain?

Which statement BEST describes the body's purpose in making lactic acid from pyruvate?

Which of the following choices is the key outcome of the citric acid cycle?

The partial structures of the coenzymes NADH and NAD+ are shown below.What type of reaction does NADH undergo to form NAD+?

The first step of glycolysis is phosphorylating glucose to make glucose 6-phosphate as shown below.Which of the following statements about this reaction is TRUE? Glucose + Pi → Glucose 6-phosphate + H2O ΔG = + 3.3 kcal/mol

What type of reaction occurs in the electron transport chain?

The ATP produced by cellular respiration is used in the process of _____________.

Which process does NOT occur in the mitochondria?

Matter, Energy, and Measurement

Atomic Structure and Radioisotopes

Ionic and Covalent Compounds

Molecular Geometry, Polarity, and Intermolecular

Chemical Quantities and Introduction to Reactions

Chemical Reactions: Energy, Rates, and Equilibrium

Changes of State and Gas Laws

Mixtures, Solution Concentrations, and Diffusion

Acids and Bases, Ph, and Buffers

Introduction to Organic Chemistry:

Alcohols, Phenols, Thiols, Ethers, and Amines

The Carbonyl Containing Functional Groups

The Common Organic Reactions in Biochemistry

Carbohydrates: Structure and Function

Lipids: Structure and Function

Proteins: Structure and Function

Nucleotides and Nucleic Acids

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The following is step 8 of the citric acid cycle.During this step, NAD⁺ is while L-malate is .

The partial structures of the coenzymes NADH and NAD⁺ are shown below.What type of reaction does NADH undergo to form NAD⁺?

The first step of glycolysis is phosphorylating glucose to make glucose 6-phosphate as shown below.Which of the following statements about this reaction is TRUE? Glucose + P_i → Glucose 6-phosphate + H₂O ΔG = + 3.3 kcal/mol