Question 1

Which of the following are responsible for the CO₂-fixation component of the carbon cycle?

Accepted Answer

A)  heterotrophs 
B)  symbionts 
C)  autotrophs 
D)  chemotrophs 
E)  organotrophs 
A)  heterotrophs 
B)  symbionts 
C)  autotrophs 
D)  chemotrophs 
E)  organotrophs

Question 2

A cafeteria worker who fails to wash his hands thoroughly and fails to wear gloves inoculates a quiche with 4 E. coli cells when he uses his finger to test whether it is done. By the time you purchase the quiche, there are 128 E. coli cells in it. How many generations did the cells go through?

Accepted Answer

A)  4 
B)  5 
C)  8 
D)  32 
E)  64 
A)  4 
B)  5 
C)  8 
D)  32 
E)  64

Question 3

Which of the following genera does NOT undergo differentiation?

Accepted Answer

A)  Anabaena 
B)  Bacillus 
C)  Clostridium 
D)  Escherichia 
E)  Streptomyces 
A)  Anabaena 
B)  Bacillus 
C)  Clostridium 
D)  Escherichia 
E)  Streptomyces

Question 4

Why does binary fission result in an exponential and not a linear growth rate?

Accepted Answer

Bacteria replicate by binary fission. In

Question 5

The shortest lag period would most likely be observed in the transfer

Accepted Answer

A)  from complex medium to fresh complex medium. 
B)  from complex medium to minimal medium. 
C)  to a lower temperature. 
D)  to a different pH. 
E)  to a different salt concentration. 
A)  from complex medium to fresh complex medium. 
B)  from complex medium to minimal medium. 
C)  to a lower temperature. 
D)  to a different pH. 
E)  to a different salt concentration.

Question 6

Describe the differences between batch culture and growth in a chemostat. What are the advantages of a chemostat?

Accepted Answer

Batch culture represents growth in a clo

Question 7

A(n) ________ cell loses membrane integrity and cannot carry out the simple transport functions needed to sustain growth.

Accepted Answer

A)  depolarized 
B)  endospore 
C)  planktonic 
D)  heterocyst 
E)  dormant 
A)  depolarized 
B)  endospore 
C)  planktonic 
D)  heterocyst 
E)  dormant

Question 8

Which of the following proteins represents a coupled transport system where two molecules travel in the same direction?

Accepted Answer

A)  aquaporin 
B)  symport 
C)  antiport 
D)  porin 
E)  diffusion transporters 
A)  aquaporin 
B)  symport 
C)  antiport 
D)  porin 
E)  diffusion transporters

Question 9

How do some cyanobacteria fix nitrogen while growing aerobically?

Accepted Answer

A)  They do not, because nitrogenase is destroyed by oxygen. 
B)  They use special cells called heterocysts that protect the enzyme. 
C)  They use spores that protect the enzyme. 
D)  They do it using no special structures or mechanisms. 
E)  They live symbiotically with other organisms that protect the enzyme. 
A)  They do not, because nitrogenase is destroyed by oxygen. 
B)  They use special cells called heterocysts that protect the enzyme. 
C)  They use spores that protect the enzyme. 
D)  They do it using no special structures or mechanisms. 
E)  They live symbiotically with other organisms that protect the enzyme.

Question 10

Quorum sensing begins during which growth stage?

Accepted Answer

A)  lag 
B)  early log 
C)  late log 
D)  stationary 
E)  death 
A)  lag 
B)  early log 
C)  late log 
D)  stationary 
E)  death

Which of the following are responsible for the CO₂-fixation component of the carbon cycle?

A cafeteria worker who fails to wash his hands thoroughly and fails to wear gloves inoculates a quiche with 4 E. coli cells when he uses his finger to test whether it is done. By the time you purchase the quiche, there are 128 E. coli cells in it. How many generations did the cells go through?

Which of the following genera does NOT undergo differentiation?

Why does binary fission result in an exponential and not a linear growth rate?

The shortest lag period would most likely be observed in the transfer

Describe the differences between batch culture and growth in a chemostat. What are the advantages of a chemostat?

A(n) ________ cell loses membrane integrity and cannot carry out the simple transport functions needed to sustain growth.

Which of the following proteins represents a coupled transport system where two molecules travel in the same direction?

How do some cyanobacteria fix nitrogen while growing aerobically?

Quorum sensing begins during which growth stage?

Microbial Life: Origin and Discovery

Observing the Microbial Cell

Cell Structure and Function

Environmental Influences and Control of Microbial Growth

Viruses

Genomes and Chromosomes

Transcription, Translation, and Bioinformatics

Gene Transfer, Mutations, and Genome Evolution

Molecular Regulation

Viral Molecular Biology

Biotechniques and Synthetic Biology

Energetics and Catabolism

Electron Flow in Organotrophy, Lithotrophy, and Phototrophy

Biosynthesis

Food and Industrial Microbiology

Origins and Evolution

Bacterial Diversity

Archaeal Diversity

Eukaryotic Diversity

Microbial Ecology

Microbes in Global Elemental Cycles

Human Microbiota and Innate Immunity

The Adaptive Immune Response

Microbial Pathogenesis

Microbial Diseases

Antimicrobial Therapy

Clinical Microbiology and Epidemiology

Filters

Exam 4: Bacterial Culture, Growth, and Development

Which of the following are responsible for the CO₂-fixation component of the carbon cycle?

A cafeteria worker who fails to wash his hands thoroughly and fails to wear gloves inoculates a quiche with 4 E. coli cells when he uses his finger to test whether it is done. By the time you purchase the quiche, there are 128 E. coli cells in it. How many generations did the cells go through?

Which of the following genera does NOT undergo differentiation?

Why does binary fission result in an exponential and not a linear growth rate?

The shortest lag period would most likely be observed in the transfer

Describe the differences between batch culture and growth in a chemostat. What are the advantages of a chemostat?

A(n) ________ cell loses membrane integrity and cannot carry out the simple transport functions needed to sustain growth.

Which of the following proteins represents a coupled transport system where two molecules travel in the same direction?

How do some cyanobacteria fix nitrogen while growing aerobically?

Quorum sensing begins during which growth stage?

Microbial Life: Origin and Discovery

Observing the Microbial Cell

Cell Structure and Function

Environmental Influences and Control of Microbial Growth

Viruses

Genomes and Chromosomes

Transcription, Translation, and Bioinformatics

Gene Transfer, Mutations, and Genome Evolution

Molecular Regulation

Viral Molecular Biology

Biotechniques and Synthetic Biology

Energetics and Catabolism

Electron Flow in Organotrophy, Lithotrophy, and Phototrophy

Biosynthesis

Food and Industrial Microbiology

Origins and Evolution

Bacterial Diversity

Archaeal Diversity

Eukaryotic Diversity

Microbial Ecology

Microbes in Global Elemental Cycles

Human Microbiota and Innate Immunity

The Adaptive Immune Response

Microbial Pathogenesis

Microbial Diseases

Antimicrobial Therapy

Clinical Microbiology and Epidemiology

Filters