Question 1

What is the term for the folded ridges in the inner membrane of the mitochondria?

Accepted Answer

A) endoplasmic reticulum 
B) matrix 
C) cristae 
D) ribosomes 
E) β-pleated sheets 
A) endoplasmic reticulum 
B) matrix 
C) cristae 
D) ribosomes 
E) β-pleated sheets C

Question 2

Under what metabolic conditions is pyruvate converted to acetyl CoA?

Accepted Answer

A) sufficient O2 
B) low ATP 
C) high ADP 
D) low NADH 
E) All of these are correct. 
A) sufficient O2 
B) low ATP 
C) high ADP 
D) low NADH 
E) All of these are correct. E

Question 3

What is the coenzyme that is required in all transamination reactions?

Accepted Answer

A) pyridoxal phosphate 
B) ADP 
C) coenzyme A 
D) hexokinase 
E) Vitamin C 
A) pyridoxal phosphate 
B) ADP 
C) coenzyme A 
D) hexokinase 
E) Vitamin C A

Question 4

What is the source of energy for the synthesis of ATP in oxidative phosphorylation?

Accepted Answer

A) O2 
B) H+ flowing through ATP synthase 
C) ADP 
D) inorganic phosphate ions 
E) hydrolysis of acetyl CoA 
A) O2 
B) H+ flowing through ATP synthase 
C) ADP 
D) inorganic phosphate ions 
E) hydrolysis of acetyl CoA

Question 5

What is another name for the F0F1 complex involved in oxidative phosphorylation?

Accepted Answer

A) NADH 
B) mitochondria 
C) cristae 
D) transport proteins 
E) ATP synthase 
A) NADH 
B) mitochondria 
C) cristae 
D) transport proteins 
E) ATP synthase

Question 6

How many molecules of ATP can be produced by the complete oxidation of one molecule of glucose in aerobic respiration?

Accepted Answer

A) 3 
B) 9 
C) 18 
D) 24 
E) 36 
A) 3 
B) 9 
C) 18 
D) 24 
E) 36

Question 7

The ribosomes found in eukaryotic cells allow the mitochondria to synthesize some of their own proteins.

Accepted Answer

A) True 
 B)False

Question 8

To what molecule is the acetyl group of acetyl CoA transferred in the first step of the citric acid cycle?

Accepted Answer

A) citrate 
B) alanine 
C) coenzyme A 
D) oxaloacetate 
E) ATP 
A) citrate 
B) alanine 
C) coenzyme A 
D) oxaloacetate 
E) ATP

Question 9

What is the term for the region of a mitochondrion that is enclosed by the inner membrane?

Accepted Answer

A) matrix space 
B) intermembrane space 
C) cristae 
D) lumen 
E) synthase space 
A) matrix space 
B) intermembrane space 
C) cristae 
D) lumen 
E) synthase space

Question 10

What is the usual fate of the α-amino group in the catabolism of amino acids?

Accepted Answer

A) It is added to a growing peptide chain at the ribosomes. 
B) It is converted into short peptide chains,which are excreted in the urine. 
C) It is converted into N2 and is expelled through the lungs. 
D) It is converted into urea,which is excreted by the body in urine. 
E) It is incorporated into the nucleotides of DNA and RNA. 
A) It is added to a growing peptide chain at the ribosomes. 
B) It is converted into short peptide chains,which are excreted in the urine. 
C) It is converted into N2 and is expelled through the lungs. 
D) It is converted into urea,which is excreted by the body in urine. 
E) It is incorporated into the nucleotides of DNA and RNA.

Question 11

Which statement is true concerning aerobic versus anaerobic metabolism?

Accepted Answer

A) Aerobic metabolism is much more efficient than anaerobic metabolism. 
B) Both metabolism methods produce the same amount of energy. 
C) Both metabolism methods yield carbon dioxide. 
D) All multicellular organisms are anaerobic. 
E) In both methods of metabolism much of the energy is lost as heat. 
A) Aerobic metabolism is much more efficient than anaerobic metabolism. 
B) Both metabolism methods produce the same amount of energy. 
C) Both metabolism methods yield carbon dioxide. 
D) All multicellular organisms are anaerobic. 
E) In both methods of metabolism much of the energy is lost as heat.

Question 12

ATP synthase is a very large multi-lipid complex.

Accepted Answer

A) True 
 B)False

Question 13

Step 6 in the citric acid cycle involves the dehydrogenation of succinate.What is the product of this reaction?

Accepted Answer

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

Question 14

What is the terminal electron acceptor in aerobic organisms?

Accepted Answer

A) ATP 
B) NAD+ 
C) FAD 
D) oxygen 
E) carbon dioxide 
A) ATP 
B) NAD+ 
C) FAD 
D) oxygen 
E) carbon dioxide

Question 15

The Krebs cycle begins with an aldol condensation.

Accepted Answer

A) True 
 B)False

Question 16

What protein complex in the inner mitochondrial membrane allows protons to return to the matrix?

Accepted Answer

A) cytochrome 
B) electron transport carriers 
C) F0F1 
D) NADH dehydrogenase 
E) porin 
A) cytochrome 
B) electron transport carriers 
C) F0F1 
D) NADH dehydrogenase 
E) porin

Question 17

Where in the mitochondrion are the protein complexes responsible for oxidative phosphorylation located?

Accepted Answer

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

Question 18

Step 7 of the citric acid cycle is shown below.Which of the following correctly describes what is occurring in this step?

Accepted Answer

A) Fumarate undergoes hydrolysis with the aid of the enzyme fumarase. 
B) Fumarate undergoes reduction with the aid of the cofactor fumarase. 
C) Fumarase supplies the hydrogens and electrons necessary for the hydrogenation of fumarate. 
D) Fumarate undergoes hydration with the aid of the enzyme fumarase. 
E) Fumarase is a coenzyme that catalyzes the hydrogenation of fumarate. 
A) Fumarate undergoes hydrolysis with the aid of the enzyme fumarase. 
B) Fumarate undergoes reduction with the aid of the cofactor fumarase. 
C) Fumarase supplies the hydrogens and electrons necessary for the hydrogenation of fumarate. 
D) Fumarate undergoes hydration with the aid of the enzyme fumarase. 
E) Fumarase is a coenzyme that catalyzes the hydrogenation of fumarate.

Question 19

Cyanide binds irreversibly to the heme group in cytochrome oxidase,which blocks electron transfer reactions.

Accepted Answer

A) True 
 B)False

Question 20

What cyclic metabolic pathway is the final stage of the degradation of carbohydrates,fats,and amino acids released from dietary proteins?

Accepted Answer

A) urea cycle 
B) pentose phosphate pathway 
C) Cori cycle 
D) β-oxidation spiral 
E) citric acid cycle 
A) urea cycle 
B) pentose phosphate pathway 
C) Cori cycle 
D) β-oxidation spiral 
E) citric acid cycle

Exam 22: Aerobic Respiration and Energy Production

What is the term for the folded ridges in the inner membrane of the mitochondria?

Under what metabolic conditions is pyruvate converted to acetyl CoA?

What is the coenzyme that is required in all transamination reactions?

What is the source of energy for the synthesis of ATP in oxidative phosphorylation?

What is another name for the F0F1 complex involved in oxidative phosphorylation?

How many molecules of ATP can be produced by the complete oxidation of one molecule of glucose in aerobic respiration?

The ribosomes found in eukaryotic cells allow the mitochondria to synthesize some of their own proteins.

To what molecule is the acetyl group of acetyl CoA transferred in the first step of the citric acid cycle?

What is the term for the region of a mitochondrion that is enclosed by the inner membrane?

What is the usual fate of the α-amino group in the catabolism of amino acids?

Which statement is true concerning aerobic versus anaerobic metabolism?

ATP synthase is a very large multi-lipid complex.

Step 6 in the citric acid cycle involves the dehydrogenation of succinate.What is the product of this reaction?

What is the terminal electron acceptor in aerobic organisms?

The Krebs cycle begins with an aldol condensation.

What protein complex in the inner mitochondrial membrane allows protons to return to the matrix?

Where in the mitochondrion are the protein complexes responsible for oxidative phosphorylation located?

Step 7 of the citric acid cycle is shown below.Which of the following correctly describes what is occurring in this step?

Cyanide binds irreversibly to the heme group in cytochrome oxidase,which blocks electron transfer reactions.

What cyclic metabolic pathway is the final stage of the degradation of carbohydrates,fats,and amino acids released from dietary proteins?

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

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What is another name for the F₀F₁ complex involved in oxidative phosphorylation?