Question 1

Each FADH2 from the Krebs cycle enters the electron transport system and gives rise to _____ ATPs.

Accepted Answer

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

Question 2

Most electron carriers are

Accepted Answer

A)  coenzymes. 
B)  enzymes. 
C)  hydrogens. 
D)  inorganic phosphate. 
E)  All of these choices are correct. 
A)  coenzymes. 
B)  enzymes. 
C)  hydrogens. 
D)  inorganic phosphate. 
E)  All of these choices are correct. A

Question 3

Enzymes that are only produced when substrate is present are termed

Accepted Answer

A)  exoenzymes. 
B)  endoenzymes. 
C)  constitutive enzymes. 
D)  induced enzymes. 
E)  conjugated enzymes. 
A)  exoenzymes. 
B)  endoenzymes. 
C)  constitutive enzymes. 
D)  induced enzymes. 
E)  conjugated enzymes. D

Question 4

The cell's metabolic reactions involve the participation of _____ that lower the activation energy needed for the initiation of a reaction.

Accepted Answer

A)  cofactors 
B)  vitamins 
C)  enzymes 
D)  ATP 
E)  Coenzymes 
A)  cofactors 
B)  vitamins 
C)  enzymes 
D)  ATP 
E)  Coenzymes

Question 5

Exergonic reactions

Accepted Answer

A)  include synthesis of large carbohydrates. 
B)  only occur in heterotrophs. 
C)  occur during aerobic cellular respiration. 
D)  do not occur in anaerobic cellular respiration. 
E)  occur when ADP binds to inorganic phosphate to form ATP. 
A)  include synthesis of large carbohydrates. 
B)  only occur in heterotrophs. 
C)  occur during aerobic cellular respiration. 
D)  do not occur in anaerobic cellular respiration. 
E)  occur when ADP binds to inorganic phosphate to form ATP.

Question 6

Enzymes that catalyze removal of carbon dioxide from a substrate are called

Accepted Answer

A)  phosphotransferases. 
B)  oxidoreductases. 
C)  decarboxylases. 
D)  aminotransferases. 
E)  ligases. 
A)  phosphotransferases. 
B)  oxidoreductases. 
C)  decarboxylases. 
D)  aminotransferases. 
E)  ligases.

Question 7

In bacterial cells, when glucose is completely oxidized by all the pathways of aerobic cellular respiration, what is the maximum number of ATP generated?

Accepted Answer

A)  2 ATP 
B)  3 ATP 
C)  24 ATP 
D)  36 ATP 
E)  38 ATP 
A)  2 ATP 
B)  3 ATP 
C)  24 ATP 
D)  36 ATP 
E)  38 ATP

Question 8

The formation of citric acid from oxaloacetic acid and an acetyl group begins

Accepted Answer

A)  glycolysis. 
B)  the electron transport system. 
C)  the Krebs cycle. 
D)  fermentation. 
E)  oxidative phosphorylation. 
A)  glycolysis. 
B)  the electron transport system. 
C)  the Krebs cycle. 
D)  fermentation. 
E)  oxidative phosphorylation.

Question 9

Which of the following is not true of the light-dependent reactions of photosynthesis?

Accepted Answer

A)  They occur in the thylakoid membranes. 
B)  They generates NADPH. 
C)  They generate glucose from CO2 and H2O. 
D)  Photons cause magnesium to release electrons. 
E)  ATP is generated by a chemiosmotic mechanism. 
A)  They occur in the thylakoid membranes. 
B)  They generates NADPH. 
C)  They generate glucose from CO2 and H2O. 
D)  Photons cause magnesium to release electrons. 
E)  ATP is generated by a chemiosmotic mechanism.

Question 10

Each of the following are denaturing agents except

Accepted Answer

A)  high temperature. 
B)  low temperature. 
C)  high pH. 
D)  low pH. 
E)  All of the choices are correct. 
A)  high temperature. 
B)  low temperature. 
C)  high pH. 
D)  low pH. 
E)  All of the choices are correct.

Question 11

Glycolysis

Accepted Answer

A)  uses 2 ATP, produces 2 ATP and requires oxygen. 
B)  uses 2 ATP, produces 4 ATP and requires oxygen. 
C)  uses 2 ATP, produces 4 ATP, does not require oxygen. 
D)  uses 2 ATP, produces 2 ATP, does not require oxygen. 
A)  uses 2 ATP, produces 2 ATP and requires oxygen. 
B)  uses 2 ATP, produces 4 ATP and requires oxygen. 
C)  uses 2 ATP, produces 4 ATP, does not require oxygen. 
D)  uses 2 ATP, produces 2 ATP, does not require oxygen.

Question 12

Formation of peptide bonds between amino acids to build a polypeptide would be called

Accepted Answer

A)  anabolism. 
B)  phosphorylation. 
C)  fermentation. 
D)  exergonic. 
E)  glycolysis. 
A)  anabolism. 
B)  phosphorylation. 
C)  fermentation. 
D)  exergonic. 
E)  glycolysis.

Question 13

Metabolic pathways that regenerate their starting point are called _____ pathways.

Accepted Answer

A)  linear 
B)  bidirectional 
C)  convergent 
D)  cyclic 
E)  divergent 
A)  linear 
B)  bidirectional 
C)  convergent 
D)  cyclic 
E)  divergent

Question 14

Which of the following are not photosynthetic pigments?

Accepted Answer

A)  carotenoids 
B)  leukophylls 
C)  phycobilins 
D)  chlorophylls 
E)  All of these choices are correct. 
A)  carotenoids 
B)  leukophylls 
C)  phycobilins 
D)  chlorophylls 
E)  All of these choices are correct.

Question 15

Each NADH that enters the electron transport system gives rise to _____ ATP.

Accepted Answer

A)  2 
B)  3 
C)  24 
D)  36 
E)  38 
A)  2 
B)  3 
C)  24 
D)  36 
E)  38

Question 16

Microbes can utilize only carbohydrates for energy production.

Accepted Answer

A) True 
 B)False

Question 17

Enzymes that catalyze removing electrons from one substrate and adding electrons to another are called

Accepted Answer

A)  phosphotransferases. 
B)  oxidoreductases. 
C)  decarboxylases. 
D)  aminotransferases. 
E)  ligases. 
A)  phosphotransferases. 
B)  oxidoreductases. 
C)  decarboxylases. 
D)  aminotransferases. 
E)  ligases.

Question 18

All aerobic bacterial species have identical electron acceptors in their electron transport systems.

Accepted Answer

A) True 
 B)False

Question 19

Which of the following represents the path of electrons during aerobic respiration?

Accepted Answer

A)  glucose - NADH - electron transport chain - oxygen 
B)  glucose - pyruvate - citric acid - oxygen 
C)  NADH - ATP - electron transport chain- oxygen 
D)  glucose - NADH - citric acid - ATP 
A)  glucose - NADH - electron transport chain - oxygen 
B)  glucose - pyruvate - citric acid - oxygen 
C)  NADH - ATP - electron transport chain- oxygen 
D)  glucose - NADH - citric acid - ATP

Question 20

FAD, NADP, and NAD are all _____ carriers.

Accepted Answer

A)  hydrogen 
B)  electron 
C)  ATP 
D)  both hydrogen and electron 
A)  hydrogen 
B)  electron 
C)  ATP 
D)  both hydrogen and electron

Exam 8: An Introduction to Microbial Metabolism: the Chemical Crossroads of Life

Each FADH2 from the Krebs cycle enters the electron transport system and gives rise to _____ ATPs.

Most electron carriers are

Enzymes that are only produced when substrate is present are termed

The cell's metabolic reactions involve the participation of _____ that lower the activation energy needed for the initiation of a reaction.

Exergonic reactions

Enzymes that catalyze removal of carbon dioxide from a substrate are called

In bacterial cells, when glucose is completely oxidized by all the pathways of aerobic cellular respiration, what is the maximum number of ATP generated?

The formation of citric acid from oxaloacetic acid and an acetyl group begins

Which of the following is not true of the light-dependent reactions of photosynthesis?

Each of the following are denaturing agents except

Glycolysis

Formation of peptide bonds between amino acids to build a polypeptide would be called

Metabolic pathways that regenerate their starting point are called _____ pathways.

Which of the following are not photosynthetic pigments?

Each NADH that enters the electron transport system gives rise to _____ ATP.

Microbes can utilize only carbohydrates for energy production.

Enzymes that catalyze removing electrons from one substrate and adding electrons to another are called

All aerobic bacterial species have identical electron acceptors in their electron transport systems.

Which of the following represents the path of electrons during aerobic respiration?

FAD, NADP, and NAD are all _____ carriers.

The Main Themes of Microbiology

The Chemistry of Biology

Tools of the Laboratory: Methods of Studying Microorganisms

A Survey of Prokaryotic Cells and Microorganisms

A Survey of Eukaryotic Cells and Microorganisms

An Introduction to Viruses

Microbial Nutrition, Ecology, and Growth

Microbial Genetics

Genetic Engineering: a Revolution in Molecular Biology

Physical and Chemical Agents for Microbial Control

Drugs, Microbes, Host--The Elements of Chemotherapy

Microbe-Human Interactions: Infection and Disease

An Introduction to Host Defenses and Innate Immunities

Adaptive, Specific Immunity and Immunization

Disorders in Immunity

Procedures for Identifying Pathogens and Diagnosing Infections

The Gram-Positive and Gram-Negative Cocci of Medical Importance

The Gram-Positive Bacilli of Medical Importance

The Gram-Negative Bacilli of Medical Importance

Miscellaneous Bacterial Agents of Disease

The Fungi of Medical Importance

The Parasites of Medical Importance

Introduction to Viruses That Infect Humans: the Dna Viruses

The Rna Viruses That Infect Humans

Environmental Microbiology

Applied and Industrial Microbiology

Filters

Each FADH₂ from the Krebs cycle enters the electron transport system and gives rise to _____ ATPs.