Question 1

Biofilm formation in Vibrio cholera is triggered by ________ cell densities and repressed by ________ cell densities.

Accepted Answer

A)  high; high 
B)  low; low 
C)  high; low 
D)  low; high 
A)  high; high 
B)  low; low 
C)  high; low 
D)  low; high

Question 2

How does the antibiotic penicillin lead to the death of pathogens?

Accepted Answer

Several penicillin binding proteins have

Question 3

Hemimethylated DNA is found on

Accepted Answer

A)  the newly synthesized strand of DNA immediately after replication. 
B)  the parental strand of DNA immediately after replication. 
C)  both strands of dsDNA immediately after replication. 
D)  neither strand of DNA immediately after replication. 
A)  the newly synthesized strand of DNA immediately after replication. 
B)  the parental strand of DNA immediately after replication. 
C)  both strands of dsDNA immediately after replication. 
D)  neither strand of DNA immediately after replication.

Question 4

The Par system is analogous to spindle fibers in eukaryotic cells.

Accepted Answer

A) True 
 B)False

Question 5

Once replication of the chromosome has begun, DnaA is inactivated

Accepted Answer

A)  as a result of being blocked from oriC binding. 
B)  by increased expression of FtsZ. 
C)  as a result of increased binding to ATP. 
D)  by increased binding of DnaA-ATP to oriC. 
A)  as a result of being blocked from oriC binding. 
B)  by increased expression of FtsZ. 
C)  as a result of increased binding to ATP. 
D)  by increased binding of DnaA-ATP to oriC.

Question 6

Unlike penicillin, methicillin targets an alternative penicillin binding protein called MecA in nonresistant Staphylococcus aureus.

Accepted Answer

A) True 
 B)False

Question 7

Which of the following molecules functions as an intracellular signaling molecule during quorum sensing?

Accepted Answer

A)  acylated homoserine lactones 
B)  hydrophilic lipids 
C)  quinones 
D)  proteorhodopsins 
A)  acylated homoserine lactones 
B)  hydrophilic lipids 
C)  quinones 
D)  proteorhodopsins

Question 8

The major trigger of endospore formation in Bacillus is nutrient deprivation. Without the appropriate nutrients, how can endospore formation occur?

Accepted Answer

Sporulating cells cannibalize cells of t

Question 9

How might a genetically modified strain of E.coli with a nonfunctional mreB gene compare to E. coli possessing a functional mreB gene?

Accepted Answer

MreB forms a simple cytoskeleton in Bact

Question 10

MRSA strains synthesize MecA only in the presence of methicillin or other β-lactam antibiotics.

Accepted Answer

A) True 
 B)False

Exam 7: Molecular Biology of Microbial Growth

Biofilm formation in Vibrio cholera is triggered by ________ cell densities and repressed by ________ cell densities.

How does the antibiotic penicillin lead to the death of pathogens?

Hemimethylated DNA is found on

The Par system is analogous to spindle fibers in eukaryotic cells.

Once replication of the chromosome has begun, DnaA is inactivated

Unlike penicillin, methicillin targets an alternative penicillin binding protein called MecA in nonresistant Staphylococcus aureus.

Which of the following molecules functions as an intracellular signaling molecule during quorum sensing?

The major trigger of endospore formation in Bacillus is nutrient deprivation. Without the appropriate nutrients, how can endospore formation occur?

How might a genetically modified strain of E.coli with a nonfunctional mreB gene compare to E. coli possessing a functional mreB gene?

MRSA strains synthesize MecA only in the presence of methicillin or other β-lactam antibiotics.

The Microbial World

Microbial Cell Structure and Function

Microbial Metabolism

Molecular Information Flow and Protein Processing

Microbial Growth and Its Control

Microbial Regulatory Systems

Viruses and Their Replication

Microbial Systems Biology

Viral Genomics, Diversity, and Ecology

Genetics of Bacteria and Archaea

Biotechnology and Synthetic Biology

Microbial Evolution and Systematics

Metabolic Diversity of Microorganisms

Functional Diversity of Microorganisms

Diversity of Bacteria

Diversity of Archaea

Diversity of Microbial Eukarya

Taking the Measure of Microbial Systems

Microbial Ecosystems

Nutrient Cycles

Microbiology of the Built Environment

Microbial Symbioses

Microbial Symbioses with Humans

Microbial Infection and Pathogenesis

Innate Immunity: Broadly Specific Host Defenses

Adaptive Immunity: Highly Specific Host Defenses

Clinical Microbiology and Immunology

Epidemiology

Person-to-Person Bacterial and Viral Diseases

Vectorborne and Soilborne Bacterial and Viral Diseases

Waterborne and Foodborne Bacterial and Viral Diseases

Eukaryotic Pathogens: Fungi, Protozoans, and Helminths

Filters

Biofilm formation in Vibrio cholera is triggered by cell densities and repressed by cell densities.