Question 1

The time between inoculation and the beginning of growth is usually called the

Accepted Answer

A)  lag phase. 
B)  dormant phase. 
C)  log phase. 
D)  death phase. 
A)  lag phase. 
B)  dormant phase. 
C)  log phase. 
D)  death phase.

Question 2

When water activity is low, an organism must

Accepted Answer

A)  increase its internal solute concentration. 
B)  increase its external solute concentration. 
C)  decrease its external solute concentration. 
D)  decrease its internal solute concentration. 
A)  increase its internal solute concentration. 
B)  increase its external solute concentration. 
C)  decrease its external solute concentration. 
D)  decrease its internal solute concentration.

Question 3

A growth curve can typically be plotted by monitoring a microbial population in a batch culture.

Accepted Answer

A) True 
 B)False

Question 4

Superoxide dismutase and catalase work together to convert superoxide back to

Accepted Answer

A)  oxygen. 
B)  ozone. 
C)  peroxide. 
D)  none of the above. 
A)  oxygen. 
B)  ozone. 
C)  peroxide. 
D)  none of the above.

Question 5

In the stationary phase, there is no net increase or decrease in cell number.

Accepted Answer

A) True 
 B)False

Question 6

Most organisms can tolerate a temperature range of about

Accepted Answer

A)  10°C. 
B)  15- 20°C. 
C)  50- 60°C. 
D)  25- 40°C. 
A)  10°C. 
B)  15- 20°C. 
C)  50- 60°C. 
D)  25- 40°C.

Question 7

Divisomes are responsible for

Accepted Answer

A)  osmotolerant growth. 
B)  thermotolerant growth. 
C)  psychrotolerant growth. 
D)  none of these. 
A)  osmotolerant growth. 
B)  thermotolerant growth. 
C)  psychrotolerant growth. 
D)  none of these.

Question 8

Planktonic cells remain in suspension, while sessile cells adhere to a surface.

Accepted Answer

A) True 
 B)False

Question 9

Which of the following forms of oxygen is/are generally toxic to living organisms?

Accepted Answer

A)  hydroxyl radical 
B)  superoxide anion 
C)  hydrogen peroxide 
D)  all of the above 
A)  hydroxyl radical 
B)  superoxide anion 
C)  hydrogen peroxide 
D)  all of the above

Question 10

The optimum temperature is usually closer to the minimum temperature than the maximum temperature.

Accepted Answer

A) True 
 B)False

Question 11

Proteins involved in prokaryotic cell division are

Accepted Answer

A)  divisomes. 
B)  MreB proteins. 
C)  Fts proteins. 
D)  none of these. 
A)  divisomes. 
B)  MreB proteins. 
C)  Fts proteins. 
D)  none of these.

Question 12

During stationary phase, many cellular functions continue, including___________ and some___________.

Accepted Answer

energy metabolism /

Question 13

Consider solution A (pH 6) and solution B (pH 9). Which of the following statements is CORRECT?

Accepted Answer

A)  Solution A is 300 times more acidic than solution B. 
B)  Solution B is 1,000 times more alkaline (basic) than solution A. 
C)  Solution B is 3,000 times more alkaline (basic) than solution A. 
D)  Solution A is 3 times more acidic than solution B. 
A)  Solution A is 300 times more acidic than solution B. 
B)  Solution B is 1,000 times more alkaline (basic) than solution A. 
C)  Solution B is 3,000 times more alkaline (basic) than solution A. 
D)  Solution A is 3 times more acidic than solution B.

Question 14

What is the function of bactoprenol?

Accepted Answer

A)  It supplies the energy necessary for transpeptidation to occur. 
B)  It triggers the recruitment of FtsZ and the initiation of the divisome. 
C)  It is a hydrophobic alcohol that transports peptidoglycan precursors across the cytoplasmic membrane. 
D)  It is responsible for forming the peptide cross- links between muramic acid residues in adjacent glycan chains. 
A)  It supplies the energy necessary for transpeptidation to occur. 
B)  It triggers the recruitment of FtsZ and the initiation of the divisome. 
C)  It is a hydrophobic alcohol that transports peptidoglycan precursors across the cytoplasmic membrane. 
D)  It is responsible for forming the peptide cross- links between muramic acid residues in adjacent glycan chains.

Question 15

Why must a standard curve be prepared when using turbidity measurements?

Accepted Answer

The answer of Why must a standard curve be prepared...

Question 16

Cell density in a chemostat is controlled by

Accepted Answer

A)  the size of the initial inoculum. 
B)  the concentration of the limiting nutrient. 
C)  the dilution factor. 
D)  all of the above. 
A)  the size of the initial inoculum. 
B)  the concentration of the limiting nutrient. 
C)  the dilution factor. 
D)  all of the above.

Question 17

Substances added to a culture to keep the pH constant are known as ____________ .

Accepted Answer

The answer of Substances added to a culture to keep...

Question 18

As a group, which organisms tend to be most acid- tolerant?

Accepted Answer

A)  fungi 
B)  Bacteria 
C)  protists 
D)  Archaea 
A)  fungi 
B)  Bacteria 
C)  protists 
D)  Archaea

Question 19

Many obligate anaerobes are killed by oxygen.

Accepted Answer

A) True 
 B)False

Question 20

Compare and contrast the spread plate method and the pour plate method of doing plate counts.

Accepted Answer

The answer of Compare and contrast the spread plate method...

Exam 5: Microbial Growth

The time between inoculation and the beginning of growth is usually called the

When water activity is low, an organism must

A growth curve can typically be plotted by monitoring a microbial population in a batch culture.

Superoxide dismutase and catalase work together to convert superoxide back to

In the stationary phase, there is no net increase or decrease in cell number.

Most organisms can tolerate a temperature range of about

Divisomes are responsible for

Planktonic cells remain in suspension, while sessile cells adhere to a surface.

Which of the following forms of oxygen is/are generally toxic to living organisms?

The optimum temperature is usually closer to the minimum temperature than the maximum temperature.

Proteins involved in prokaryotic cell division are

During stationary phase, many cellular functions continue, including___________ and some___________.

Consider solution A (pH 6) and solution B (pH 9). Which of the following statements is CORRECT?

What is the function of bactoprenol?

Why must a standard curve be prepared when using turbidity measurements?

Cell density in a chemostat is controlled by

Substances added to a culture to keep the pH constant are known as ____________ .

As a group, which organisms tend to be most acid- tolerant?

Many obligate anaerobes are killed by oxygen.

Compare and contrast the spread plate method and the pour plate method of doing plate counts.

Microorganisms and Microbiology

A Brief Journey to the Microbial World

Cell Structure and Function in Bacteria and Archaea

Nutrition, Culture, and Metabolism of Microorganisms

Molecular Biology of Bacteria

Archael and Eukaryotic Molecular Biology

Regulation of Gene Expression

Viruses and Virology

Genetics of Bacteria and Arachaea

Genetic Engineering

Microbial Genomics

Phototrophy, Chemolithotrophy, and Major Biosyntheses

Catabolism of Organic Compounds

Commercial Products and Biotechnology

Microbial Evolution and Systematics

Bacteria: the Proteobacteria

Other Bacteria

Archaea

Eukaryotic Cell Biology and Eukaryotic Microorganisms

Viral Diversity

Methods in Microbial Ecology

Major Microbial Habitats and Diversity

Nutrient Cycles, Biodegradation, and Bioremediation

Microbial Symbioses

Microbial Growth Control

Microbial Interactions With Humans

Immunity and Host Defense

Immune Mechanisms

Molecular Immunology

Diagnostic Microbiology and Immunology

Epidemiology

Person-To-Person Microbial Diseases

Vectorborne and Soilborne Microbial Pathogens

Wastewater Treatment, Water Purification, and Waterborne Microbial Diseases

Food Preservation and Foodborne Microbial Diseases

Filters

During stationary phase, many cellular functions continue, including_ and some_.