OPENSTAX MICROBIOLOGY TEST BANK
/ OSX MICROBIOLOGY TEST BANK -
CHAPTER 01 TO CHAPTER 26 2025 -
2026 UPDATE EXAM QUESTIONS WITH
CORRECT ANSWERS RATED A+
(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
Chapter 9 : 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 Pathogenicity
,Chapter 16 : Disease and Epidemiology
Chapter 17 : Innate Nonspecific Host
Defenses Chapter 18 : Adaptive Specific
Host Defenses Chapter 19 : Diseases of
the Immune 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?
A. All microbes are harmful.
B. Humans could survive without microbes.
C. Many microbes are helpful.* (correct answer)
D. Most microbes are pathogenic.
Difficulty: Easy
ASM Standard: 23, 24
2. Which of the following is when humans first suspected the existence of microbes?
A. during the Industrial Revolution
B. in prehistoric times* (correct answer)
C. in the last century
D. within the last 500 years
Difficulty: Easy
ASM Standard: 23
3. Which individual first observed unicellular organisms, which he called “animalcules,”
using a microscope he developed?
A. Robert Koch
B. Louis Pasteur
C. Thucydides
D. Antonie van Leeuwenhoek* (correct answer)
Difficulty: Easy
ASM Standard:
6
4. 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
Page 1 of 17
, OpenStax Microbiology Test Bank
Chapter 1: An Invisible World
B. ethylene oxide
C. incubators
D. microincinerators* (correct answer)
Difficulty: Easy
ASM Standard: 36
Page 2 of 17
/ OSX MICROBIOLOGY TEST BANK -
CHAPTER 01 TO CHAPTER 26 2025 -
2026 UPDATE EXAM QUESTIONS WITH
CORRECT ANSWERS RATED A+
(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
Chapter 9 : 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 Pathogenicity
,Chapter 16 : Disease and Epidemiology
Chapter 17 : Innate Nonspecific Host
Defenses Chapter 18 : Adaptive Specific
Host Defenses Chapter 19 : Diseases of
the Immune 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?
A. All microbes are harmful.
B. Humans could survive without microbes.
C. Many microbes are helpful.* (correct answer)
D. Most microbes are pathogenic.
Difficulty: Easy
ASM Standard: 23, 24
2. Which of the following is when humans first suspected the existence of microbes?
A. during the Industrial Revolution
B. in prehistoric times* (correct answer)
C. in the last century
D. within the last 500 years
Difficulty: Easy
ASM Standard: 23
3. Which individual first observed unicellular organisms, which he called “animalcules,”
using a microscope he developed?
A. Robert Koch
B. Louis Pasteur
C. Thucydides
D. Antonie van Leeuwenhoek* (correct answer)
Difficulty: Easy
ASM Standard:
6
4. 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
Page 1 of 17
, OpenStax Microbiology Test Bank
Chapter 1: An Invisible World
B. ethylene oxide
C. incubators
D. microincinerators* (correct answer)
Difficulty: Easy
ASM Standard: 36
Page 2 of 17
