Question 1

Which of the choices below best describes the purpose of the following step of glycolysis?

Accepted Answer

A)  In this step, the molecule is phosphorylated to keep it in the cell. 
B)  In this step, the molecule is split into two, both of which will become pyruvate. 
C)  In this step, NADH is made. 
D)  In this step, energy is stored as ATP. 
E)  In this step, pyruvate is made. 
A)  In this step, the molecule is phosphorylated to keep it in the cell. 
B)  In this step, the molecule is split into two, both of which will become pyruvate. 
C)  In this step, NADH is made. 
D)  In this step, energy is stored as ATP. 
E)  In this step, pyruvate is made. A

Question 2

Where in the cell does glycolysis occur?

Accepted Answer

A)  in the mitochondria 
B)  in endoplasmic reticulum 
C)  in the golgi complex 
D)  in the cytoplasm 
E)  in the vacuoles 
A)  in the mitochondria 
B)  in endoplasmic reticulum 
C)  in the golgi complex 
D)  in the cytoplasm 
E)  in the vacuoles D

Question 3

Which of the following statements does NOT describe the safest and healthiest way for a person to lose weight?

Accepted Answer

A)  A person should drastically reduce their caloric intake. 
B)  A person should eat a moderate intake of calories. 
C)  A person should include exercise in their daily routine. 
D)  A person should eat nutritious foods. 
E)  A person should maintain steady blood glucose levels. 
A)  A person should drastically reduce their caloric intake. 
B)  A person should eat a moderate intake of calories. 
C)  A person should include exercise in their daily routine. 
D)  A person should eat nutritious foods. 
E)  A person should maintain steady blood glucose levels. A

Question 4

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 5

The second step of F1F1F1S1F1F1F10-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 6

Which of the following statements about the role of oxygen in the electron-transport chain is NOT true?

Accepted Answer

A)  Oxygen is the ultimate receptor of electrons. 
B)  Oxygen is reduced to water during oxidative phosphorylation. 
C)  We inhale oxygen so that it can be used to accept electrons. 
D)  Catabolism is called cellular respiration because it uses oxygen. 
E)  All of the above are true. 
A)  Oxygen is the ultimate receptor of electrons. 
B)  Oxygen is reduced to water during oxidative phosphorylation. 
C)  We inhale oxygen so that it can be used to accept electrons. 
D)  Catabolism is called cellular respiration because it uses oxygen. 
E)  All of the above are true.

Question 7

During ATP hydrolysis, to what molecule is a phosphoryl group transferred?

Accepted Answer

A)  another ATP 
B)  ADP 
C)  AMP 
D)  water 
E)  Pi 
A)  another ATP 
B)  ADP 
C)  AMP 
D)  water 
E)  Pi

Question 8

Which bond in ATP is referred to as a "high-energy bond"?

Accepted Answer

A)  a C-H bond 
B)  a C-P bond 
C)  a C-O bond 
D)  a P-O bond 
E)  a P=O bond 
A)  a C-H bond 
B)  a C-P bond 
C)  a C-O bond 
D)  a P-O bond 
E)  a P=O bond

Question 9

The fate of pyruvate depends on its environment. Which of the following choices correctly matches how pyruvate reacts, what molecule it becomes, and where it goes next?

Accepted Answer

A) a 
B) b 
C) c 
D) d 
E) e 
A) a 
B) b 
C) c 
D) d 
E) e

Question 10

In the electron-transport chain, one NADH molecule supplies the energy to phosphorylate ___ ADP molecules and one FADH2 supplies the energy to phosphorylate ___ ADP molecules.

Accepted Answer

A)  1; 1 
B)  2; 2 
C)  3; 3 
D)  2; 3 
E)  2.5; 1.5 
A)  1; 1 
B)  2; 2 
C)  3; 3 
D)  2; 3 
E)  2.5; 1.5

Question 11

Which of the following statements describes a necessary role of glucose in the body?

Accepted Answer

A)  Glucose supplies energy to the brain. 
B)  Proteins are composed of glucose. 
C)  Fat stores are composed of glucose. 
D)  Glucose is the only source of energy for the entire body. 
E)  All of the above are true. 
A)  Glucose supplies energy to the brain. 
B)  Proteins are composed of glucose. 
C)  Fat stores are composed of glucose. 
D)  Glucose is the only source of energy for the entire body. 
E)  All of the above are true.

Question 12

Which of the following pathways results in pyruvate?

Accepted Answer

A)  hydrolysis 
B)  glycolysis 
C)  gluconeogenesis 
D)  the citric acid cycle 
E)  All of these pathways produce pyruvate. 
A)  hydrolysis 
B)  glycolysis 
C)  gluconeogenesis 
D)  the citric acid cycle 
E)  All of these pathways produce pyruvate.

Question 13

Which of the following statements about glycolysis is NOT true?

Accepted Answer

A)  Glycolysis is the only energy producing metabolic pathway in the brain. 
B)  Glycolysis requires oxygen. 
C)  Anaerobic microorganisms use glycolysis for energy production. 
D)  Glycolysis is an important biochemical pathway in botulism. 
E)  Glycolysis produces pyruvate from glucose. 
A)  Glycolysis is the only energy producing metabolic pathway in the brain. 
B)  Glycolysis requires oxygen. 
C)  Anaerobic microorganisms use glycolysis for energy production. 
D)  Glycolysis is an important biochemical pathway in botulism. 
E)  Glycolysis produces pyruvate from glucose.

Question 14

Which of the following processes 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 15

Why is fatty acid catabolism called β-oxidation?

Accepted Answer

A)  because half of the reactions involve oxidation of the third carbon atom in the fatty acid chain 
B)  because half of the reactions involve oxidation of the second carbon atom in the fatty acid chain 
C)  because half of the reactions involve oxidation of the first carbon atom in the fatty acid chain 
D)  because it is the second biochemical pathway in fatty acid catabolism 
E)  because it is the penultimate pathway in fatty acid catabolism 
A)  because half of the reactions involve oxidation of the third carbon atom in the fatty acid chain 
B)  because half of the reactions involve oxidation of the second carbon atom in the fatty acid chain 
C)  because half of the reactions involve oxidation of the first carbon atom in the fatty acid chain 
D)  because it is the second biochemical pathway in fatty acid catabolism 
E)  because it is the penultimate pathway in fatty acid catabolism

Question 16

The following reaction is a key step in the metabolism of glucose. Which of the following molecules is formed as a result of this reaction?

Accepted Answer

A)  ADP 
B)  H+ 
C)  ATP 
D)  H2O 
E)  Pi 
A)  ADP 
B)  H+ 
C)  ATP 
D)  H2O 
E)  Pi

Question 17

Most enzymes involved in the citric acid cycle are found in the ________ of the mitochondria.

Accepted Answer

A)  inner membrane 
B)  outer membrane 
C)  intermembrane space 
D)  matrix 
E)  The citric acid cycle does not occur in the mitochondria. 
A)  inner membrane 
B)  outer membrane 
C)  intermembrane space 
D)  matrix 
E)  The citric acid cycle does not occur in the mitochondria.

Question 18

Which of the following statements best describes the purpose of oxygen in the oxidation of pyruvate to acetyl CoA?

Accepted Answer

A)  The oxygen is released during the reaction. 
B)  The oxygen is required to react with pyruvate. 
C)  The oxygen makes HS-CoA more reactive. 
D)  The oxygen regenerates NAD+ from NADH. 
E)  The oxygen reacts with H+. 
A)  The oxygen is released during the reaction. 
B)  The oxygen is required to react with pyruvate. 
C)  The oxygen makes HS-CoA more reactive. 
D)  The oxygen regenerates NAD+ from NADH. 
E)  The oxygen reacts with H+.

Question 19

What is the purpose of coenzyme A in metabolism?

Accepted Answer

A)  Coenzyme A delivers ADP so that it can be phosphorylated to become ATP. 
B)  Coenzyme A delivers ATP so that it can be dephosphorylated to become ADP. 
C)  Coenzyme A provides the energy for catabolism to occur. 
D)  Coenzyme A transfers electrons to where they need to go. 
E)  Coenzyme A transfers acyl groups. 
A)  Coenzyme A delivers ADP so that it can be phosphorylated to become ATP. 
B)  Coenzyme A delivers ATP so that it can be dephosphorylated to become ADP. 
C)  Coenzyme A provides the energy for catabolism to occur. 
D)  Coenzyme A transfers electrons to where they need to go. 
E)  Coenzyme A transfers acyl groups.

Question 20

Catabolism is often called

Accepted Answer

A)  oxidative phosphorylation. 
B)  cellular respiration. 
C)  anabolism. 
D)  oxidation-reduction. 
E)  the citric acid cycle. 
A)  oxidative phosphorylation. 
B)  cellular respiration. 
C)  anabolism. 
D)  oxidation-reduction. 
E)  the citric acid cycle.

Which of the choices below best describes the purpose of the following step of glycolysis?

Where in the cell does glycolysis occur?

Which of the following statements does NOT describe the safest and healthiest way for a person to lose weight?

Under what circumstances are amino acids metabolized?

The second step of -oxidation is shown below. What type of reaction is this?

Which of the following statements about the role of oxygen in the electron-transport chain is NOT true?

During ATP hydrolysis, to what molecule is a phosphoryl group transferred?

Which bond in ATP is referred to as a "high-energy bond"?

The fate of pyruvate depends on its environment. Which of the following choices correctly matches how pyruvate reacts, what molecule it becomes, and where it goes next?

In the electron-transport chain, one NADH molecule supplies the energy to phosphorylate _ ADP molecules and one FADH₂ supplies the energy to phosphorylate _ ADP molecules.

Which of the following statements describes a necessary role of glucose in the body?

Which of the following pathways results in pyruvate?

Which of the following statements about glycolysis is NOT true?

Which of the following processes does NOT occur during the citric acid cycle?

Why is fatty acid catabolism called β-oxidation?

The following reaction is a key step in the metabolism of glucose. Which of the following molecules is formed as a result of this reaction?

Most enzymes involved in the citric acid cycle are found in the ________ of the mitochondria.

Which of the following statements best describes the purpose of oxygen in the oxidation of pyruvate to acetyl CoA?

What is the purpose of coenzyme A in metabolism?

Catabolism is often called

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The Reactions of Organic Functional Groups in Biochemistry

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Exam 15: Energy and Metabolism

Which of the choices below best describes the purpose of the following step of glycolysis?

Where in the cell does glycolysis occur?

Which of the following statements does NOT describe the safest and healthiest way for a person to lose weight?

Under what circumstances are amino acids metabolized?

The second step of -oxidation is shown below. What type of reaction is this?

Which of the following statements about the role of oxygen in the electron-transport chain is NOT true?

During ATP hydrolysis, to what molecule is a phosphoryl group transferred?

Which bond in ATP is referred to as a "high-energy bond"?

The fate of pyruvate depends on its environment. Which of the following choices correctly matches how pyruvate reacts, what molecule it becomes, and where it goes next?

In the electron-transport chain, one NADH molecule supplies the energy to phosphorylate ___ ADP molecules and one FADH2 supplies the energy to phosphorylate ___ ADP molecules.

Which of the following statements describes a necessary role of glucose in the body?

Which of the following pathways results in pyruvate?

Which of the following statements about glycolysis is NOT true?

Which of the following processes does NOT occur during the citric acid cycle?

Why is fatty acid catabolism called β-oxidation?

The following reaction is a key step in the metabolism of glucose. Which of the following molecules is formed as a result of this reaction?

Most enzymes involved in the citric acid cycle are found in the ________ of the mitochondria.

Which of the following statements best describes the purpose of oxygen in the oxidation of pyruvate to acetyl CoA?

What is the purpose of coenzyme A in metabolism?

Catabolism is often called

Measuring Matter and Energy

Atomic Structure and Nuclear Radiation

Compounds and Molecules

Chemical Quantities and Chemical Reactions

Changes of State and the Gas Laws

Organic Chemistry: Hydrocarbons

Organic Chemistry and Biomolecules

Solutions, Colloids and Membranes

Acids and Bases

The Reactions of Organic Functional Groups in Biochemistry

Carbohydrates: Structure and Function

Lipids: Structure and Function

Proteins: Structure and Function

Nucleotides and Nucleic Acids

Filters

In the electron-transport chain, one NADH molecule supplies the energy to phosphorylate _ ADP molecules and one FADH₂ supplies the energy to phosphorylate _ ADP molecules.