Question 1

Why does traditional microbial growth media only allow for the growth of 0.1% of all microorganisms in pure culture in the laboratory?

Accepted Answer

Traditional microbial growth media conta

Question 2

What is happening in the figure shown?

Accepted Answer

A)  The mold on the left is producing a compound that inhibits the growth of the bacterial colonies on the right. 
B)  The mold on the left is outcompeting the bacterial cells for nutrients and therefore is growing faster. 
C)  The bacterial cells on the right are inhibiting the growth of the mold on the left. 
D)  The mold and bacterial cells are growing in a symbiotic relationship. 
A)  The mold on the left is producing a compound that inhibits the growth of the bacterial colonies on the right. 
B)  The mold on the left is outcompeting the bacterial cells for nutrients and therefore is growing faster. 
C)  The bacterial cells on the right are inhibiting the growth of the mold on the left. 
D)  The mold and bacterial cells are growing in a symbiotic relationship.

Question 3

Based on the figure below,approximately what percentage of the hospitalizations in week 43 resulted in deaths?

Accepted Answer

A)  80% 
B)  40% 
C)  20% 
D)  4% 
A)  80% 
B)  40% 
C)  20% 
D)  4%

Question 4

What would John Tyndall have needed to use to disprove the theory of spontaneous generation with his experiments?

Accepted Answer

A)  a swan-neck flask 
B)  a microscope 
C)  an autoclave 
D)  organic media 
A)  a swan-neck flask 
B)  a microscope 
C)  an autoclave 
D)  organic media

Question 5

Which of the following statements does NOT provide evidence in support of the endosymbiotic origin of eukaryotic cells?

Accepted Answer

A)  The DNA sequence of mitochondria is similar to the DNA sequence of respiring bacteria. 
B)  The DNA of chloroplasts is circular like the DNA of phototrophic bacteria. 
C)  Mitochondria are capable of free-living outside of a eukaryotic cell. 
D)  There is a lot of sequence homology between the DNA sequences of chloroplasts and phototrophic bacteria. 
A)  The DNA sequence of mitochondria is similar to the DNA sequence of respiring bacteria. 
B)  The DNA of chloroplasts is circular like the DNA of phototrophic bacteria. 
C)  Mitochondria are capable of free-living outside of a eukaryotic cell. 
D)  There is a lot of sequence homology between the DNA sequences of chloroplasts and phototrophic bacteria.

Question 6

Explain how it would have taken much longer to disprove the theory of spontaneous generation if John Tyndall was the only scientist investigating it.

Accepted Answer

John Tyndall found the opposite result o

Question 7

The first cellular genome sequenced was a(n)

Accepted Answer

A)  animal. 
B)  virus. 
C)  archaea. 
D)  bacteria. 
A)  animal. 
B)  virus. 
C)  archaea. 
D)  bacteria.

Question 8

Which of the following would you not expect to find in the human digestive tract?

Accepted Answer

A)  archaea 
B)  algae 
C)  bacteria 
D)  intestinal viruses 
A)  archaea 
B)  algae 
C)  bacteria 
D)  intestinal viruses

Question 9

Which of the following is always classified as a eukaryote?

Accepted Answer

A)  papillomavirus 
B)  methanogen 
C)  Escherichia coli 
D)  yeast 
A)  papillomavirus 
B)  methanogen 
C)  Escherichia coli 
D)  yeast

Question 10

Which of the following techniques is effective in creating an attenuated version of a pathogen useful for vaccinations?

Accepted Answer

A)  putting a liquid culture of the pathogen in the freezer 
B)  heating an aged culture of the pathogen 
C)  homogenizing a culture of the pathogen 
D)  exposing a culture of the pathogen to nuclear radiation 
A)  putting a liquid culture of the pathogen in the freezer 
B)  heating an aged culture of the pathogen 
C)  homogenizing a culture of the pathogen 
D)  exposing a culture of the pathogen to nuclear radiation

Question 11

The involvement of bacteria in ________ explains why their presence is essential to the continued existence of plants and animals.

Accepted Answer

The answer of The involvement of bacteria in ________ explains...

Question 12

If Spallanzani had unknowingly poked a hole in the top of his flask of meat broth,what would this have implied about the theory of spontaneous generation?

Accepted Answer

A)  No growth would have occurred in the flask, refuting the theory of spontaneous generation. 
B)  No growth would have occurred in the flask, supporting the theory of spontaneous generation. 
C)  Growth would have occurred in the flask, refuting the theory of spontaneous generation. 
D)  Growth would have occurred in the flask, supporting the theory of spontaneous generation. 
A)  No growth would have occurred in the flask, refuting the theory of spontaneous generation. 
B)  No growth would have occurred in the flask, supporting the theory of spontaneous generation. 
C)  Growth would have occurred in the flask, refuting the theory of spontaneous generation. 
D)  Growth would have occurred in the flask, supporting the theory of spontaneous generation.

Question 13

Which of the following is NOT an example of an endosymbiont?

Accepted Answer

A)  Bacillus anthracis spores present in the soil of cattle farms 
B)  rhizobial bacteria growing in the root nodules of certain plants 
C)  microorganisms in the digestive system of the cow degrading cellulose 
D)  bacteria in termite intestines digesting plant polymers 
A)  Bacillus anthracis spores present in the soil of cattle farms 
B)  rhizobial bacteria growing in the root nodules of certain plants 
C)  microorganisms in the digestive system of the cow degrading cellulose 
D)  bacteria in termite intestines digesting plant polymers

Question 14

Warts are a common skin condition caused by an organism that cannot be grown in pure culture on an agar petri dish and is small enough to pass through a tiny-pored filter.What is the causative agent of warts?

Accepted Answer

A)  a bacterium 
B)  a virus 
C)  an archaea 
D)  a fungus 
A)  a bacterium 
B)  a virus 
C)  an archaea 
D)  a fungus

Question 15

Give an example of a situation where Koch's postulates may not work properly.

Accepted Answer

A variety of answers are acceptable so l

Question 16

The arrow in the figure shows a(n)

Accepted Answer

A)  gelatin suspension. 
B)  endospore. 
C)  colony. 
D)  cell. 
A)  gelatin suspension. 
B)  endospore. 
C)  colony. 
D)  cell.

Question 17

Observe the DNA sequence shown.This sequence terminates at the base ________.

Accepted Answer

The answer of Observe the DNA sequence shown.This sequence terminates...

Question 18

Regarding the natural source for the production of antibiotics,the best weapon we have against pathogenic microorganisms is

Accepted Answer

A)  medical doctors. 
B)  acclaimed scientific researchers. 
C)  other microorganisms that can exist with the pathogenic microorganisms. 
D)  the CDC. 
A)  medical doctors. 
B)  acclaimed scientific researchers. 
C)  other microorganisms that can exist with the pathogenic microorganisms. 
D)  the CDC.

Question 19

Bacteria and archaea are classified as ________.

Accepted Answer

The answer of Bacteria and archaea are classified as ________....

Question 20

Which of the following has been used as a tool for gene therapy?

Accepted Answer

A)  viruses 
B)  archaea 
C)  protozoa 
D)  fungi 
A)  viruses 
B)  archaea 
C)  protozoa 
D)  fungi

Exam 1: Microbes Shape Our History

Why does traditional microbial growth media only allow for the growth of 0.1% of all microorganisms in pure culture in the laboratory?

What is happening in the figure shown?

Based on the figure below,approximately what percentage of the hospitalizations in week 43 resulted in deaths?

What would John Tyndall have needed to use to disprove the theory of spontaneous generation with his experiments?

Which of the following statements does NOT provide evidence in support of the endosymbiotic origin of eukaryotic cells?

Explain how it would have taken much longer to disprove the theory of spontaneous generation if John Tyndall was the only scientist investigating it.

The first cellular genome sequenced was a(n)

Which of the following would you not expect to find in the human digestive tract?

Which of the following is always classified as a eukaryote?

Which of the following techniques is effective in creating an attenuated version of a pathogen useful for vaccinations?

The involvement of bacteria in ________ explains why their presence is essential to the continued existence of plants and animals.

If Spallanzani had unknowingly poked a hole in the top of his flask of meat broth,what would this have implied about the theory of spontaneous generation?

Which of the following is NOT an example of an endosymbiont?

Warts are a common skin condition caused by an organism that cannot be grown in pure culture on an agar petri dish and is small enough to pass through a tiny-pored filter.What is the causative agent of warts?

Give an example of a situation where Koch's postulates may not work properly.

The arrow in the figure shows a(n)

Observe the DNA sequence shown.This sequence terminates at the base ________.

Regarding the natural source for the production of antibiotics,the best weapon we have against pathogenic microorganisms is

Bacteria and archaea are classified as ________.

Which of the following has been used as a tool for gene therapy?

Basic Concepts of Infectious Disease

Observing Microbes

Living Chemistry: From Atoms to Cells

Cell Biology of Bacteria and Eukaryotes

Bacterial Growth, Nutrition, and Differentiation

Bacterial Metabolism

Bacterial Genetics and Biotechnology

Bacterial Genomes and Evolution

Bacterial Diversity

Eukaryotic Microbes and Invertebrate Infectious Agents

Viruses

Sterilization, Disinfection, and Antibiotic Therapy

Normal Human Microbiota: a Delicate Balance of Power

The Immune System: Inflammation and Innate Immunity

The Immune System: Adaptive Immunity

Immune Disorders, Tools, and Vaccines

Microbial Pathogenesis

Infections of the Skin and Eye

Infections of the Respiratory Tract

Systemic Infections

Infections of the Digestive System

Infections of the Urinary and Reproductive Tracts

Infections of the Central Nervous System

Diagnostic Clinical Microbiology

Epidemiology: Tracking Infectious Diseases

Environmental and Food Microbiology

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