OPENSTAX MICROBIOLOGY EXAM LATEST 2024-2025
COMPLETE TESTBANK WITH ALL QUESTIONS AND
CORRECT VERIFIED ANSWERS
Which of the following is true of the microbial world?
A. All microbes are harmful.
B. Humans could survive without microbes.
C. Many microbes are helpful.
D. Most microbes are pathogenic. - CORRECT ANSWER✔✔C. Many microbes are helpful
Which of the following is when humans first suspected the existence of microbes?
A. during the Industrial Revolution
B. in prehistoric times
C. in the last century
D. within the last 500 years - CORRECT ANSWER✔✔B. in prehistoric times
1. Which individual first observed unicellular organisms, which he called "animalcules," using a
microscope he developed?
A. Robert Koch
B. Louis Pasteur
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C. Thucydides
D. Antonie van Leeuwenhoek - CORRECT ANSWER✔✔D. Antonie van Leeuwenhoek
1. To reduce the risk of open flame from Bunsen burners, microbiologists are increasingly using
which of the following devices for easy, rapid benchtop sterilization of small pieces of
equipment?
A. autoclaves
B. ethylene oxide
C. incubators
D. microincinerators - CORRECT ANSWER✔✔D. microincinerators
The Swedish botanist known for having developed an important biological classification system
is which of the following people?
A. Ernst Haeckel
B. Carolus Linnaeus
C. Louis Pasteur
D. Robert Whittaker - CORRECT ANSWER✔✔B. Carolus Linnaeus
Which kingdom was the only one found in Empire Prokaryota?
A. Animalia
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B. Fungi
C. Monera
D. Protista - CORRECT ANSWER✔✔C. Monera
Which are the three currently accepted domains?
A. Archaea, Bacteria, and Eukarya
B. Archaea, Prokaryota, and Eukaryota
C. Bacteria, Fungi, and Protista
D. Bacteria, Prokaryota, and Eukarya - CORRECT ANSWER✔✔A. Archaea, Bacteria, and Eukarya
Which two taxonomic units are typically used to identify an organism when using binomial
nomenclature?
A. domain and kingdom
B. genus and family
C. genus and species
D. phylum and class - CORRECT ANSWER✔✔C. genus and species
Which of the following is not true about the process of fermentation?
A. It can help preserve foods, preventing spoilage.
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B. It converts sugars to organic acids, alcohols, and/or gases such as carbon dioxide.
C. It is carried out exclusively by unicellular eukaryotes such as yeast.
D. It is used to make foods such as cheese and bread. - CORRECT ANSWER✔✔C. It is carried out
exclusively by unicellular eukaryotes such as yeast.
The Romans may have reduced their risk of waterborne infectious diseases by using which of
the following?
A. a variety of pharmaceutical products
B. aqueducts and a sewer system
C. prophylactic antibiotics
D. quarantine of people with leprosy - CORRECT ANSWER✔✔B. aqueducts and a sewer system
For which of the following is Thucydides known?
A. developing an effective sewer system in ancient Greece, helping to reduce levels of disease in
cities
B. observing microbes, using a microscope, for the first time, even distinguishing between
bacteria and fungi
C. proposing that disease was caused by microorganisms
D. realizing that people who had been infected by the Athenian plague had immunity to
reinfection - CORRECT ANSWER✔✔D. realizing that people who had been infected by the
Athenian plague had immunity to reinfection
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