Question 1

Enzymes that catalyze moving a phosphate from one substrate 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. A

Question 2

The most likely place where an exoenzyme participates in a chemical reaction is

Accepted Answer

A) mitochondria. 
B) within the cell membrane. 
C) lysosomes. 
D) cytoplasm. 
E) outside of the cell. 
A) mitochondria. 
B) within the cell membrane. 
C) lysosomes. 
D) cytoplasm. 
E) outside of the cell. E

Question 3

What is the final electron acceptor during aerobic respiration?

Accepted Answer

A) pyruvic acid 
B) oxygen 
C) nitrate 
D) Cytochrome c 
E) FAD 
A) pyruvic acid 
B) oxygen 
C) nitrate 
D) Cytochrome c 
E) FAD B

Question 4

Which form of energy fuels cellular energetics in chemoheterotrophs?

Accepted Answer

A) light energy from the Sun 
B) chemical energy in organic compounds 
C) electrical energy 
D) thermal energy 
A) light energy from the Sun 
B) chemical energy in organic compounds 
C) electrical energy 
D) thermal energy

Question 5

Intermediates from the Krebs cycle can be converted to amino acids by the process of

Accepted Answer

A) amination. 
B) deamination. 
C) phosphorylation. 
D) beta oxidation. 
E) gluconeogenesis. 
A) amination. 
B) deamination. 
C) phosphorylation. 
D) beta oxidation. 
E) gluconeogenesis.

Question 6

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 7

Which of the following would produce the most ATP?

Accepted Answer

A) E.coli growing in a sealed glucose broth for 48 hours 
B) E.coli growing in a well-aerated glucose broth for 48 hours 
C) Both cultures would produce the same amount of ATP. 
D) This prediction cannot be made from the information provided. 
A) E.coli growing in a sealed glucose broth for 48 hours 
B) E.coli growing in a well-aerated glucose broth for 48 hours 
C) Both cultures would produce the same amount of ATP. 
D) This prediction cannot be made from the information provided.

Question 8

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 9

A holoenzyme is a combination of a protein and one or more substances called

Accepted Answer

A) substrates. 
B) apoenzymes. 
C) catalysts. 
D) cofactors. 
A) substrates. 
B) apoenzymes. 
C) catalysts. 
D) cofactors.

Question 10

An apoenzyme

Accepted Answer

A) is part of a simple enzyme. 
B) is also called a coenzyme. 
C) is the protein part of a holoenzyme. 
D) is often an inorganic metal ion. 
E) is an RNA molecule. 
A) is part of a simple enzyme. 
B) is also called a coenzyme. 
C) is the protein part of a holoenzyme. 
D) is often an inorganic metal ion. 
E) is an RNA molecule.

Question 11

Enzymes that are secreted by a cell to catalyze hydrolysis reactions are

Accepted Answer

A) apoenzymes. 
B) exoenzymes. 
C) constitutive enzymes. 
D) regulated enzymes. 
E) endoenzymes. 
A) apoenzymes. 
B) exoenzymes. 
C) constitutive enzymes. 
D) regulated enzymes. 
E) endoenzymes.

Question 12

The redox carriers of the electron transport chain that have a tightly bound metal atom responsible for accepting and donating electrons are

Accepted Answer

A) NAD molecules. 
B) FAD molecules. 
C) NADP molecules. 
D) the cytochromes. 
E) the flavoproteins. 
A) NAD molecules. 
B) FAD molecules. 
C) NADP molecules. 
D) the cytochromes. 
E) the flavoproteins.

Question 13

Important components of coenzymes are

Accepted Answer

A) vitamins. 
B) metallic ions. 
C) active sites. 
D) substrates. 
E) ribozymes. 
A) vitamins. 
B) metallic ions. 
C) active sites. 
D) substrates. 
E) ribozymes.

Question 14

In the cell, energy released by electrons is often used to phosphorylate

Accepted Answer

A) ATP. 
B) ADP. 
C) pyruvic acid. 
D) oxygen. 
E) NAD. 
A) ATP. 
B) ADP. 
C) pyruvic acid. 
D) oxygen. 
E) NAD.

Question 15

When glucose is broken down by glycolysis during bacterial fermentation, what is the net production of ATP?

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 16

ATP is composed of deoxyribose, adenine, and 3 phosphate groups.

Accepted Answer

A) True 
 B)False

Question 17

Which of the following is not a process that regenerates ATP?

Accepted Answer

A) oxidative phosphorylation 
B) reductive phosphorylation 
C) substrate-level phosphorylation 
D) photophosphorylation 
A) oxidative phosphorylation 
B) reductive phosphorylation 
C) substrate-level phosphorylation 
D) photophosphorylation

Question 18

All organisms that are photosynthetic are oxygenic.

Accepted Answer

A) True 
 B)False

Question 19

When the product of reaction A becomes the reactant of reaction B, the metabolic pathway is

Accepted Answer

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

Question 20

Which of these enzymes is NOT an exoenzyme?

Accepted Answer

A) ATP synthase 
B) streptokinase 
C) penicillinase 
D) collagenase 
E) elastase 
A) ATP synthase 
B) streptokinase 
C) penicillinase 
D) collagenase 
E) elastase

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

Enzymes that catalyze moving a phosphate from one substrate to another are called

The most likely place where an exoenzyme participates in a chemical reaction is

What is the final electron acceptor during aerobic respiration?

Which form of energy fuels cellular energetics in chemoheterotrophs?

Intermediates from the Krebs cycle can be converted to amino acids by the process of

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

Which of the following would produce the most ATP?

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

A holoenzyme is a combination of a protein and one or more substances called

An apoenzyme

Enzymes that are secreted by a cell to catalyze hydrolysis reactions are

The redox carriers of the electron transport chain that have a tightly bound metal atom responsible for accepting and donating electrons are

Important components of coenzymes are

In the cell, energy released by electrons is often used to phosphorylate

When glucose is broken down by glycolysis during bacterial fermentation, what is the net production of ATP?

ATP is composed of deoxyribose, adenine, and 3 phosphate groups.

Which of the following is not a process that regenerates ATP?

All organisms that are photosynthetic are oxygenic.

When the product of reaction A becomes the reactant of reaction B, the metabolic pathway is

Which of these enzymes is NOT an exoenzyme?

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

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