Question 1

Which of the following substances serves as an intermediate through which all cellular energy sources are interconvertible?

Accepted Answer

A) acetyl CoA 
B) glucose 
C) ATP 
D) pyruvate 
E) citrate 
A) acetyl CoA 
B) glucose 
C) ATP 
D) pyruvate 
E) citrate

Question 2

What is the ultimate fate of glucose under aerobic conditions?

Accepted Answer

A) Conversion to coenzyme A. 
B) Conversion to ethanol. 
C) Complete oxidation to CO2 by way of the citric acid cycle. 
D) Complete reduction to CH4. 
E) Conversion to triglycerides. 
A) Conversion to coenzyme A. 
B) Conversion to ethanol. 
C) Complete oxidation to CO2 by way of the citric acid cycle. 
D) Complete reduction to CH4. 
E) Conversion to triglycerides.

Question 3

What key function does the urea cycle play in the degradation of amino acids?

Accepted Answer

A) removes ammonium ions from the blood 
B) provides nitrogen for the synthesis of proteins 
C) removes carbon monoxide from the blood 
D) removes carboxylic acids from the blood 
E) provides carboxyl groups for the synthesis of amino acids 
A) removes ammonium ions from the blood 
B) provides nitrogen for the synthesis of proteins 
C) removes carbon monoxide from the blood 
D) removes carboxylic acids from the blood 
E) provides carboxyl groups for the synthesis of amino acids

Question 4

Acetyl coenzyme A is central to cellular metabolism.

Accepted Answer

A) True 
 B)False

Question 5

How many cycles of the citric acid cycle are required to completely oxidize all the pyruvate formed when a molecule of glucose undergoes glycolysis?

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
E) 5 
A) 1 
B) 2 
C) 3 
D) 4 
E) 5

Question 6

What is the role of F0 in the F0F1 complex used in oxidative phosphorylation?

Accepted Answer

A) It accepts two electrons and a hydrogen ion from NADH in forming NAD+. 
B) It accepts two electrons and two hydrogen ions from FADH2 in forming FAD. 
C) It pumps H+ out of the mitochondrial matrix into the intermembrane space. 
D) It provides the channel for the return of H+ to the matrix of the mitochondria. 
E) It uses the energy released from the flow of H+ to the matrix to synthesize ATP. 
A) It accepts two electrons and a hydrogen ion from NADH in forming NAD+. 
B) It accepts two electrons and two hydrogen ions from FADH2 in forming FAD. 
C) It pumps H+ out of the mitochondrial matrix into the intermembrane space. 
D) It provides the channel for the return of H+ to the matrix of the mitochondria. 
E) It uses the energy released from the flow of H+ to the matrix to synthesize ATP.

Question 7

Which of the following compounds,in high concentration,is a negative effector of citrate synthase,the enzyme that catalyzes the first step of the citric acid cycle?

Accepted Answer

A) ADP 
B) acetyl CoA 
C) ATP 
D) NAD+ 
E) FAD 
A) ADP 
B) acetyl CoA 
C) ATP 
D) NAD+ 
E) FAD

Question 8

The conversion of isocitrate to α-ketoglutarate in step 3 of the citric acid cycle actually occurs by the two-step process shown below.What is true about step 3b?

Accepted Answer

A) The reaction is a decarboxylation reaction. 
B) The reaction is a hydration reaction. 
C) The reaction is a dehydration reaction. 
D) The reaction is an alkene addition reaction. 
E) The reaction is a hydrolysis reaction. 
A) The reaction is a decarboxylation reaction. 
B) The reaction is a hydration reaction. 
C) The reaction is a dehydration reaction. 
D) The reaction is an alkene addition reaction. 
E) The reaction is a hydrolysis reaction.

Question 9

Which of the following compounds is a positive effector of the allosteric enzyme isocitrate dehydrogenase?

Accepted Answer

A) ATP 
B) FAD 
C) GTP 
D) ADP 
E) NADH 
A) ATP 
B) FAD 
C) GTP 
D) ADP 
E) NADH

Question 10

What molecule acts as a positive allosteric effector of the conversion of isocitrate to α-ketoglutarate in the citric acid cycle?

Accepted Answer

A) NADH 
B) ATP 
C) ADP 
D) CO2 
E) O2 
A) NADH 
B) ATP 
C) ADP 
D) CO2 
E) O2

Question 11

Which enzyme in the mitochondria is responsible for phosphorylation of ADP?

Accepted Answer

A) ATP 
B) ATP synthase 
C) ADP synthase 
D) NADH 
E) None of the choices are correct. 
A) ATP 
B) ATP synthase 
C) ADP synthase 
D) NADH 
E) None of the choices are correct.

Question 12

Which of the following accepts an α-amino group from amino acids in a transamination reaction?

Accepted Answer

A) glutamate 
B) pyruvate 
C) coenzyme A 
D) acetyl CoA 
E) α-ketoglutarate 
A) glutamate 
B) pyruvate 
C) coenzyme A 
D) acetyl CoA 
E) α-ketoglutarate

Question 13

Which of the following statements concerning mitochondria is FALSE?

Accepted Answer

A) Mitochondria are football shaped organelles located inside the nucleus of a cell. 
B) Mitochondria are believed to have evolved from bacteria that were "captured" by eukaryotic cells. 
C) Mitochondria contain their own genetic information (DN
A) . 
D) Mitochondria produce the majority of the ATP for our cells. 
E) Mitochondria are self-replicating that is,they grow in size and divide to produce new mitochondria. 
A) Mitochondria are football shaped organelles located inside the nucleus of a cell. 
B) Mitochondria are believed to have evolved from bacteria that were "captured" by eukaryotic cells. 
C) Mitochondria contain their own genetic information (DN
A) . 
D) Mitochondria produce the majority of the ATP for our cells. 
E) Mitochondria are self-replicating that is,they grow in size and divide to produce new mitochondria.

Question 14

Oxaloacetate is the starting material in the first step of the citric acid cycle and the product of the last step.The last step of the citric acid cycle,the oxidation of malate,is shown below.What is the structure of the oxaloacetate product?

Accepted Answer

A) 
  
B) 
  
C) 
  
D) 
  
E) 
  
A) 
  
B) 
  
C) 
  
D) 
  
E)

Question 15

In the first stage of amino acid degradation,the carboxylate group is removed as carbon dioxide.

Accepted Answer

A) True 
 B)False

Which of the following substances serves as an intermediate through which all cellular energy sources are interconvertible?

What is the ultimate fate of glucose under aerobic conditions?

What key function does the urea cycle play in the degradation of amino acids?

Acetyl coenzyme A is central to cellular metabolism.

How many cycles of the citric acid cycle are required to completely oxidize all the pyruvate formed when a molecule of glucose undergoes glycolysis?

What is the role of F₀in the F₀F₁ complex used in oxidative phosphorylation?

Which of the following compounds,in high concentration,is a negative effector of citrate synthase,the enzyme that catalyzes the first step of the citric acid cycle?

The conversion of isocitrate to α-ketoglutarate in step 3 of the citric acid cycle actually occurs by the two-step process shown below.What is true about step 3b?

Which of the following compounds is a positive effector of the allosteric enzyme isocitrate dehydrogenase?

What molecule acts as a positive allosteric effector of the conversion of isocitrate to α-ketoglutarate in the citric acid cycle?

Which enzyme in the mitochondria is responsible for phosphorylation of ADP?

Which of the following accepts an α-amino group from amino acids in a transamination reaction?

Which of the following statements concerning mitochondria is FALSE?

Oxaloacetate is the starting material in the first step of the citric acid cycle and the product of the last step.The last step of the citric acid cycle,the oxidation of malate,is shown below.What is the structure of the oxaloacetate product?

In the first stage of amino acid degradation,the carboxylate group is removed as carbon dioxide.

Chemistry - Methods and Measurement

The Structure of the Atom and the Periodic Table

Structure and Properties of Ionic and Covalent Compounds

Calculations, chemical Changes, and the Chemical Equation

States of Matter: Gases, liquids, and Solids

Solutions

Energy,rate and Equilibrium

Acids and Bases

The Nucleus, radioactivity, and Nuclear Medicine

An Introduction to Organic Chemistry

The Unsaturated Hydrocarbons: Alkenes, alkynes, and Aromatics

Alcohols, phenols, thiols, and Ethers

Aldehydes and Ketones

Carboxylic Acids and Carboxylic Acid Derivatives

Amines and Amides

Carbohydrates

Lipids and Their Functions in Biochemical Systems

Protein Structure and Function

Enzymes

Introduction to Molecular Genetics

Carbohydrate Metabolism

Fatty Acid Metabolism

Filters

Exam 22: Aerobic Respiration and Energy Production

Which of the following substances serves as an intermediate through which all cellular energy sources are interconvertible?

What is the ultimate fate of glucose under aerobic conditions?

What key function does the urea cycle play in the degradation of amino acids?

Acetyl coenzyme A is central to cellular metabolism.

How many cycles of the citric acid cycle are required to completely oxidize all the pyruvate formed when a molecule of glucose undergoes glycolysis?

What is the role of F0 in the F0F1 complex used in oxidative phosphorylation?

Which of the following compounds,in high concentration,is a negative effector of citrate synthase,the enzyme that catalyzes the first step of the citric acid cycle?

The conversion of isocitrate to α-ketoglutarate in step 3 of the citric acid cycle actually occurs by the two-step process shown below.What is true about step 3b?

Which of the following compounds is a positive effector of the allosteric enzyme isocitrate dehydrogenase?

What molecule acts as a positive allosteric effector of the conversion of isocitrate to α-ketoglutarate in the citric acid cycle?

Which enzyme in the mitochondria is responsible for phosphorylation of ADP?

Which of the following accepts an α-amino group from amino acids in a transamination reaction?

Which of the following statements concerning mitochondria is FALSE?

Oxaloacetate is the starting material in the first step of the citric acid cycle and the product of the last step.The last step of the citric acid cycle,the oxidation of malate,is shown below.What is the structure of the oxaloacetate product?

In the first stage of amino acid degradation,the carboxylate group is removed as carbon dioxide.

Chemistry - Methods and Measurement

The Structure of the Atom and the Periodic Table

Structure and Properties of Ionic and Covalent Compounds

Calculations, chemical Changes, and the Chemical Equation

States of Matter: Gases, liquids, and Solids

Solutions

Energy,rate and Equilibrium

Acids and Bases

The Nucleus, radioactivity, and Nuclear Medicine

An Introduction to Organic Chemistry

The Unsaturated Hydrocarbons: Alkenes, alkynes, and Aromatics

Alcohols, phenols, thiols, and Ethers

Aldehydes and Ketones

Carboxylic Acids and Carboxylic Acid Derivatives

Amines and Amides

Carbohydrates

Lipids and Their Functions in Biochemical Systems

Protein Structure and Function

Enzymes

Introduction to Molecular Genetics

Carbohydrate Metabolism

Fatty Acid Metabolism

Filters

What is the role of F₀in the F₀F₁ complex used in oxidative phosphorylation?