OpenStax Microbiology Test Bank Updated Latest 2026–2027 Comprehensive Microbiology Exam Questions with Verified Answers Explained High Yield Study Guide for Finals Midterms Lab Practice and Success

OpenStax Microbiology Test Bank OSX MicrobiologyT




Test Bank - Chapter 01 to Chapter 26 2024 Update

(Multiple Choice, True/False, Matching, Fill in the Blank, Short Answers& Brief
Essay)

Chapter 1 : An Invisible World
Chapter 2 : How We See the Invisible World
Chapter 3 : The Cell
Chapter 4 : Prokaryotic Diversity
Chapter 5 : The Eukaryotes of Microbiology
Chapter 6 : Acellular Pathogens
Chapter 7 : Microbial
Biochemistry Chapter 8 :
Microbial Metabolism Chapter9
: Microbial Growth
Chapter 10 : Biochemistry of the Genome
Chapter 11 : Mechanisms of Microbial
Genetics
Chapter 12 : Modern Applications of Microbial Genetics
Chapter 13 : Control of Microbial Growth
Chapter 14 : Antimicrobial Drugs
Chapter 15 : Microbial Mechanisms of PathogenicityChapter
16 : Disease and Epidemiology
Chapter 17 : Innate Nonspecific Host Defenses
Chapter 18 : Adaptive Specific Host Defenses
Chapter 19 : Diseases of theImmune System
Chapter 20 : Laboratory Analysis of the Immune
Response Chapter 21 : Skin and Eye Infections
Chapter 22 : Respiratory System Infections Chapter
23 : Urogenital System Infections Chapter 24 :
Digestive System Infections
Chapter 25 : Circulatory and Lymphatic System Infections
Chapter 26 : Nervous System Infections Description

,OpenStax Microbiology Test Bank
Chapter 1: An Invisible World
Chapter 1: An Invisible World

* (correct answer) =

Correct answer

Multiple Choice

1. Which of the following is true of the microbial world?
T T T T T T T T T



A. All microbes are harmful.
T T T



B. Humans could survive without microbes.
T T T T



C. Manymicrobes are helpful.*(correctanswer)
T T T T T



D. Most microbes are pathogenic.
T T T




Difficulty: Easy T



ASM Standard: 23, 24
T T T




2. Which of the following is when humans first suspected the existence of microbes?
T T T T T T T T T T T T



A. during theIndustrial Revolution
T T T



B. in prehistorictimes*(correctanswer)
T T T T



C. in the last century
T T T



D. within the last 500 years
T T T T




Difficulty: Easy ASM T T T



Standard:23 T




3. Which individual first observed unicellular organisms, which he called “animalcules,” usinga
T T T T T T T T T T T



microscope he developed? T T



A. RobertKoch T



B. Louis Pasteur T



C. Thucydides
D. Antonievan Leeuwenhoek*(correct answer)
T T T T




Difficulty: Easy T T



ASM Standard:6
T T




4. To reduce the risk of open flame from Bunsen burners, microbiologists are increasingly using
T T T T T T T T T T T T T T



which of the following devices for easy, rapid benchtop sterilization of small pieces of
T T T T T T T T T T T T T T



equipment?
A. autoclaves
B. ethyleneoxide T



C. incubators
D. microincinerators*(correctanswer) T T




Difficulty: Easy ASM T T T



Standard:36 T




Page 1 of 17

,OpenStax Microbiology Test Bank
Chapter 1: An Invisible World
5. Which kingdom was the only one found in Empire Prokaryota?
T T T T T T T T T



A. Animalia
B. Fungi
C. Monera*(correctanswer) T T



D. Protista

Difficulty: Easy ASM T T T



Standard:N/A T




6. The Swedishbotanist known for having developed an important biological classification
T T T T T T T T T T T



system is which of the following people?
T T T T T T



A. Ernst Haeckel T



B. CarolusLinnaeus* (correctanswer) T T T



C. Louis Pasteur T



D. RobertWhittaker T




Difficulty: Easy ASM T T T



Standard:N/A T




7. Which are thethree currently accepted domains?
T T T T T T



A. Archaea,Bacteria,andEukarya*(correctanswer) T T T T T



B. Archaea,Prokaryota, and Eukaryota T T T



C. Bacteria, Fungi,and Protista T T T



D. Bacteria,Prokaryota,and Eukarya T T T




Difficulty: Easy ASM T T T



Standard:N/A T




8. Which two taxonomic units are typically used to identify an organism when using binomial
T T T T T T T T T T T T T T



nomenclature?
A. domain and kingdom T T



B. genus and family T T



C. genusandspecies*(correct answer)
T T T T



D. phylum and class T T




Difficulty: Easy ASM T T T



Standard:N/A T




9. Which of the following is not true about theprocess of fermentation?
T T T T T T T T T T T



A. It can help preserve foods, preventing spoilage.
T T T T T T



B. It converts sugars to organic acids, alcohols, and/or gases such as carbon dioxide.
T T T T T T T T T T T T



C. It is carried out exclusively by unicellular eukaryotes such as yeast.*(correct answer)
T T T T T T T T T T T T



D. It is used to make foods such as cheese and bread.
T T T T T T T T T T




Difficulty: Moderate ASM T T T



Standard:11,23,26 T T T




Page 2 of 17

, OpenStax Microbiology Test Bank
Chapter 1: An Invisible World


10. For which of the following is Thucydides known?
T T T T T T T



A. developing an effective sewer system in ancient Greece, helping to reduce levels of T T T T T T T T T T T T T



disease in cities T T



B. observing microbes, using a microscope, for thefirst time, even distinguishing between
T T T T T T T T T T T T



bacteria and fungi T T



C. proposing that disease was caused by microorganisms T T T T T T



D. realizing that people who had been infected by theAthenian plague had immunity
T T T T T T T T T T T T T



toreinfection*(correct answer) T T




Difficulty: Moderate ASM T T T



Standard:23,31 T T




11. The Romans may have reduced their risk of waterborne infectious diseases by using which of
T T T T T T T T T T T T T T T



the following?
T



A. a variety of pharmaceutical products
T T T T



B. aqueductsand a sewer system*(correct answer) T T T T T T



C. prophylacticantibiotics T



D. quarantine of people with leprosy T T T T




Difficulty: Moderate T T



ASM Standard: 23
T T




12. Ernst Haeckel proposed a classification system consisting of which of the following
T T T T T T T T T T T T



subgroups?
A. five kingdoms T



B. four kingdoms*(correct answer)
T T T



C. two domains and three kingdoms
T T T T



D. two domains and five kingdoms
T T T T




Difficulty: Moderate T T



ASM Standard: N/A
T T




13. Viruses not included in phylogenetic trees for which of the following reasons?
T T T T T T T T T T T



A. It is too difficult to observe their characteristics.
T T T T T T T



B. They areacellular and nonliving.*(correct answer)
T T T T T T



C. They do not have any genes, which prevents genetic analysis.
T T T T T T T T T



D. They lack a nucleus. T T T




Difficulty: Moderate T T



ASM Standard: 5T T




14. Which is the best description of the primary purpose of a phylogeny?
T T T T T T T T T T T



A. Phylogenies show all thealterative names for each species. T T T T T T T T



B. Phylogenies show allthe common names for each species. T T T T T T T T



C. Phylogenies showevolutionaryrelatedness betweenorganisms.*(correct answer) T T T T T T T




Page 3 of 17