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MICROBIOLOGY: AN INTRODUCTION (14TH EDITION) —
TORTORA, FUNKE & CASE EXAM QUESTIONS WITH
VERIFIED QUESTIONS DETAILED RATIONALES GRADED A+
Microbiology: An Introduction (14th Edition) — Tortora, Funke & Case
Original Questions — Microbiology: An Introduction (14th Edition)
Chapter 1: The Microbial World and You (Questions 1–15)
1. Microorganisms are involved in each of the following processes EXCEPT
A) infection
B) decomposition of organic material
C) O₂ production
D) food production
E) smog production
Answer: E — smog production
Rationale: Microorganisms are involved in infection, decomposition, oxygen production, and
food production. Smog production is a chemical process not mediated by microorganisms.
2. Each of the following organisms would be considered a microbe EXCEPT
A) yeast
B) protozoan
C) bacterium
D) mushroom
E) virus
Answer: D — mushroom
Rationale: Mushrooms are macroscopic fungi and are not considered microbes. Yeasts,
protozoa, bacteria, and viruses are all microscopic.
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3. The term used to describe a disease-causing microorganism is
A) microbe
B) bacterium
C) virus
D) pathogen
E) infection
Answer: D — pathogen
Rationale: A pathogen is defined as a disease-causing microorganism.
4. Common commercial benefits of microorganisms include synthesis of
A) riboflavin
B) acetone
C) insulin
D) aspirin
E) riboflavin, acetone, and insulin
Answer: E — riboflavin, acetone, and insulin
Rationale: Microorganisms are used commercially to synthesize riboflavin, acetone, and insulin,
among other products.
5. What factors contribute to the rising incidence of antibiotic resistance?
A) overuse of specific drugs
B) misuse of specific drugs
C) random mutations in bacterial genomes
D) random mutations, overuse, and misuse of specific drugs
E) overuse and misuse of specific drugs
Answer: D — random mutations, overuse, and misuse of specific drugs
Rationale: Antibiotic resistance arises from random mutations in bacterial genomes combined
with overuse and misuse of antibiotics.
6. The formal system for classifying and naming organisms was developed by
A) Robert Koch
B) Ignaz Semmelweis
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C) Aristotle
D) Carolus Linnaeus
E) Louis Pasteur
Answer: D — Carolus Linnaeus
Rationale: Carolus Linnaeus developed the formal system of binomial nomenclature for
classifying and naming organisms.
7. In the name Staphylococcus aureus, aureus is the
A) genus
B) domain name
C) species
D) kingdom
E) family name
Answer: C — species
Rationale: In binomial nomenclature, the first name is the genus (Staphylococcus) and the
second name is the species epithet (aureus).
8. A prokaryotic cell may possess each of the following cellular components EXCEPT
A) flagella
B) a nucleus
C) ribosomes
D) a cell wall
E) a cell membrane
Answer: B — a nucleus
Rationale: Prokaryotic cells lack a membrane-bound nucleus. They possess flagella, ribosomes,
cell walls, and cell membranes.
9. Which of the following is NOT associated with viruses?
A) organelles
B) nucleic acid
C) envelope
D) chemical reactions
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Answer: A — organelles
Rationale: Viruses are acellular and lack organelles. They possess nucleic acid, may have an
envelope, and carry out chemical reactions.
10. Protozoan motility structures include
A) cilia
B) flagella
C) pseudopods
D) cilia and pseudopods only
E) cilia, flagella, and pseudopods
Answer: E — cilia, flagella, and pseudopods
Rationale: Protozoa may move using cilia, flagella, or pseudopods.
11. Viruses are not considered living organisms because they
A) cannot reproduce by themselves
B) are structurally very simple
C) can only be visualized using an electron microscope
D) are typically associated with disease
E) are ubiquitous in nature
Answer: A — cannot reproduce by themselves
Rationale: Viruses are obligate intracellular parasites and cannot reproduce independently,
which is why they are not considered living organisms.
12. Microbes that live stably in and on the human body are called the
A) transient microbiota
B) human microbiome
C) pathogenic microorganisms
D) virulent microorganisms
E) opportunistic microbiota
Answer: B — human microbiome
Rationale: The human microbiome consists of microorganisms that live stably in and on the
human body.
MICROBIOLOGY: AN INTRODUCTION (14TH EDITION) —
TORTORA, FUNKE & CASE EXAM QUESTIONS WITH
VERIFIED QUESTIONS DETAILED RATIONALES GRADED A+
Microbiology: An Introduction (14th Edition) — Tortora, Funke & Case
Original Questions — Microbiology: An Introduction (14th Edition)
Chapter 1: The Microbial World and You (Questions 1–15)
1. Microorganisms are involved in each of the following processes EXCEPT
A) infection
B) decomposition of organic material
C) O₂ production
D) food production
E) smog production
Answer: E — smog production
Rationale: Microorganisms are involved in infection, decomposition, oxygen production, and
food production. Smog production is a chemical process not mediated by microorganisms.
2. Each of the following organisms would be considered a microbe EXCEPT
A) yeast
B) protozoan
C) bacterium
D) mushroom
E) virus
Answer: D — mushroom
Rationale: Mushrooms are macroscopic fungi and are not considered microbes. Yeasts,
protozoa, bacteria, and viruses are all microscopic.
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3. The term used to describe a disease-causing microorganism is
A) microbe
B) bacterium
C) virus
D) pathogen
E) infection
Answer: D — pathogen
Rationale: A pathogen is defined as a disease-causing microorganism.
4. Common commercial benefits of microorganisms include synthesis of
A) riboflavin
B) acetone
C) insulin
D) aspirin
E) riboflavin, acetone, and insulin
Answer: E — riboflavin, acetone, and insulin
Rationale: Microorganisms are used commercially to synthesize riboflavin, acetone, and insulin,
among other products.
5. What factors contribute to the rising incidence of antibiotic resistance?
A) overuse of specific drugs
B) misuse of specific drugs
C) random mutations in bacterial genomes
D) random mutations, overuse, and misuse of specific drugs
E) overuse and misuse of specific drugs
Answer: D — random mutations, overuse, and misuse of specific drugs
Rationale: Antibiotic resistance arises from random mutations in bacterial genomes combined
with overuse and misuse of antibiotics.
6. The formal system for classifying and naming organisms was developed by
A) Robert Koch
B) Ignaz Semmelweis
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C) Aristotle
D) Carolus Linnaeus
E) Louis Pasteur
Answer: D — Carolus Linnaeus
Rationale: Carolus Linnaeus developed the formal system of binomial nomenclature for
classifying and naming organisms.
7. In the name Staphylococcus aureus, aureus is the
A) genus
B) domain name
C) species
D) kingdom
E) family name
Answer: C — species
Rationale: In binomial nomenclature, the first name is the genus (Staphylococcus) and the
second name is the species epithet (aureus).
8. A prokaryotic cell may possess each of the following cellular components EXCEPT
A) flagella
B) a nucleus
C) ribosomes
D) a cell wall
E) a cell membrane
Answer: B — a nucleus
Rationale: Prokaryotic cells lack a membrane-bound nucleus. They possess flagella, ribosomes,
cell walls, and cell membranes.
9. Which of the following is NOT associated with viruses?
A) organelles
B) nucleic acid
C) envelope
D) chemical reactions
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Answer: A — organelles
Rationale: Viruses are acellular and lack organelles. They possess nucleic acid, may have an
envelope, and carry out chemical reactions.
10. Protozoan motility structures include
A) cilia
B) flagella
C) pseudopods
D) cilia and pseudopods only
E) cilia, flagella, and pseudopods
Answer: E — cilia, flagella, and pseudopods
Rationale: Protozoa may move using cilia, flagella, or pseudopods.
11. Viruses are not considered living organisms because they
A) cannot reproduce by themselves
B) are structurally very simple
C) can only be visualized using an electron microscope
D) are typically associated with disease
E) are ubiquitous in nature
Answer: A — cannot reproduce by themselves
Rationale: Viruses are obligate intracellular parasites and cannot reproduce independently,
which is why they are not considered living organisms.
12. Microbes that live stably in and on the human body are called the
A) transient microbiota
B) human microbiome
C) pathogenic microorganisms
D) virulent microorganisms
E) opportunistic microbiota
Answer: B — human microbiome
Rationale: The human microbiome consists of microorganisms that live stably in and on the
human body.
