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BIO-3300-01: Microbiology Questions with Correct Answers
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How did Louis Pasteur disprove spontaneous generation? a. the flask's swan neck prevented bacteria from reaching the broth, which remained sterile for many years b. the flask's swan neck allowed bacteria to reach the broth c. he did not: spontaneous generation exists and is widely accepted by th...

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  • August 8, 2024
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  • 2024/2025
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BIO-3300-01: Microbiology Questions with Correct
Answers
How did Louis Pasteur disprove spontaneous generation?
a. the flask's swan neck prevented bacteria from reaching the broth,
which remained sterile for many years
b. the flask's swan neck allowed bacteria to reach the broth
c. he did not: spontaneous generation exists and is widely accepted by
the scientific community
d. the broth was boiled Correct Answer-a. the flask's swan neck
prevented bacteria from reaching the broth, which remained sterile for
many years


Human life could not exist without the activities of organisms because
of:
a. less oxygen
b. absence of nitrogen fixation
c. no plants or animals
d. all the above Correct Answer-d. all the above


How is normal microbiota important for human health?
a. development of immune system
b. promote digestion
c. compete with bacteria that cause disease
d. all the above Correct Answer-d. all the above

,Which factors contribute to the prevalence of infectious diseases?
a. lack of sanitation
b. lack of vaccines and antibiotics
c. contact with animals or environments that have the pathogen
d. all the above Correct Answer-d. all the above


In the designation Escherichia coli B:
a. Escherichia is the genus, coli defines the species, and B is the strain
b. coli is the genus, Escherichia defines the species, and B is the strain
c. Escherichia coli defines the genus, and B is the strain
d. this microorganism does not exist Correct Answer-a. Escherichia is
the genus, coli defines the species, and B is the strain


Viruses are not microorganisms because:
a. they do not have a cellular structure and need host cells to propagate
b. they are made of particles
c. viral particles always contain nucleic acids and proteins
d. all the above Correct Answer-d. all the above


There are three non-living groups of microorganisms: viruses, viroids,
and prions. There contain the following molecules:
a. Viruses - nucleic acids | Viroids - RNA | Prions - DNA
b. Viruses - nucleic acids | Viroids - RNA | Prions - Protein

, c. Viruses - nucleic acids and protein | Viroids - RNA | Prions - Protein
d. Viruses - RNA | Viroids - DNA| Prions - Protein Correct Answer-c.
Viruses - nucleic acids and protein | Viroids - RNA | Prions - Protein


The property of endospores that led to confusion in the experiments on
spontaneous generation is their:
a. small size
b. ability to pass through cork stoppers
c. heat resistance
d. presence in all infusions Correct Answer-c. heat resistance


The golden age of microbiology was the time when:
a. most pathogenic bacteria were identified
b. microorganisms were first used to make bread and cheese
c. a vaccine against influenza was developed
d. antibiotics became available Correct Answer-a. most pathogenic
bacteria were identified


If all prokaryotes were eliminated from the planet:
a. animals would thrive because there would be no disease
b. archaea would thrive because there would be no competition for
nutrients
c. animals and archaea would thrive
d. all animals would die Correct Answer-d. all animals would die

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