MICROBIOLOGY EXAM 1 MULTIPLE
CHOICE QUESTIONS AND ANSWERS
WITH COMPLETE SOLUTIONS
ALREADY PASSED!!!
Microbiology Foundations: Classification, Culture & Pioneers (Chapter 1)
Question 1: Which of the following microorganisms are NOT eukaryotic?
A. Bacteria
B. Yeasts
C. Molds
D. Protozoa
✔✔ Correct Answer: A (Bacteria are single-celled prokaryotes lacking a
membrane-bound nucleus. Yeasts, molds [fungi], and protozoa are all eukaryotes).
Question 2: Which microorganisms are used to make microbiological growth
media (specifically agar, derived from red seaweeds)?
A. Bacteria
B. Fungi
C. Algae
D. Protozoa
✔✔ Correct Answer: C (Agar, the primary solidifying agent in microbiological
culture media, is an extract derived from red algae/seaweed species such as
Gelidium).
Question 3: Which of the following scientists hypothesized that an isolated
bacterial colony arises from a single bacterial cell?
A. Anton van Leeuwenhoek
B. Robert Koch
C. Louis Pasteur
D. Julius Richard Petri
,✔✔ Correct Answer: B (Robert Koch introduced solid media techniques—
initially using potato slices and gelatin, then agar—hypothesizing that each
discrete colony originates from a single progenitor cell or colony-forming unit).
Question 4: Anton van Leeuwenhoek described the microscopic
microorganisms he observed as:
A. Animalcules
B. Prokaryotes
C. Eukaryotes
D. Protozoa
✔✔ Correct Answer: A (In his classic letters to the Royal Society of London,
Leeuwenhoek termed the moving organisms he observed in pond water and teeth
scrapings "animalcules").
Would you like to review solidifying agents in culture media (agar properties) or
Koch's techniques for pure culture isolation next?
Yes
Of the following scientists, who first promulgated the theory of abiogenesis?
a. Aristotle
b. Pasteur
c. Needham
d. Spallanzani -ANSWER✔✔a. Aristotle
Which of the following scientists hypothesized that a bacterial colony arises from a
single bacterial cell?
a. Ann van Leeuwenhoek
b. Louis Pasteur
,c. Robert Koch
d. Richard Petri -ANSWER✔✔c. Robert Koch
Which scientist first hypothesized that medical personnel could infect patients with
pathogens?
a. Edward Jenner
b. Joseph lister
c. John Snow
d. Ignaz Semmelweis -ANSWER✔✔d. Ignaz Semmelweis
1. Leeuwenhoek described microorganisms as _________
a. Animalcules
b. Prokaryotes
c. Eukaryotes
d. Protozoa -ANSWER✔✔a. Animalcules
Which of the following favored the theory of spontaneous generation?
a. Spallanzani
b. Needham
c. Pasteur
d. Koch -ANSWER✔✔b. Needham
, 1. A scientist who studies the role of microorganisms in the environment is a(n)
_________.
a. Genetic technologist
b. Earth microbiologist
c. Epidemiologist
d. Environmental microbiologist -ANSWER✔✔d. Environmental microbiologist
1. The laboratory of Robert Koch contributed which of the following to the field of
microbiology?
a. Simple staining
b. Use of petri dish
c. First photomicrograph of bacteria
d. All the above -ANSWER✔✔d. All the above
What does the science of microbiology study?
a. all life forms
b. disease-causing life forms
c. bacteria
d. life forms too small to see with the unaided eye -ANSWER✔✔d. life forms too
small to see with the unaided eye
Are most microorganisms harmful or harmless to people?
CHOICE QUESTIONS AND ANSWERS
WITH COMPLETE SOLUTIONS
ALREADY PASSED!!!
Microbiology Foundations: Classification, Culture & Pioneers (Chapter 1)
Question 1: Which of the following microorganisms are NOT eukaryotic?
A. Bacteria
B. Yeasts
C. Molds
D. Protozoa
✔✔ Correct Answer: A (Bacteria are single-celled prokaryotes lacking a
membrane-bound nucleus. Yeasts, molds [fungi], and protozoa are all eukaryotes).
Question 2: Which microorganisms are used to make microbiological growth
media (specifically agar, derived from red seaweeds)?
A. Bacteria
B. Fungi
C. Algae
D. Protozoa
✔✔ Correct Answer: C (Agar, the primary solidifying agent in microbiological
culture media, is an extract derived from red algae/seaweed species such as
Gelidium).
Question 3: Which of the following scientists hypothesized that an isolated
bacterial colony arises from a single bacterial cell?
A. Anton van Leeuwenhoek
B. Robert Koch
C. Louis Pasteur
D. Julius Richard Petri
,✔✔ Correct Answer: B (Robert Koch introduced solid media techniques—
initially using potato slices and gelatin, then agar—hypothesizing that each
discrete colony originates from a single progenitor cell or colony-forming unit).
Question 4: Anton van Leeuwenhoek described the microscopic
microorganisms he observed as:
A. Animalcules
B. Prokaryotes
C. Eukaryotes
D. Protozoa
✔✔ Correct Answer: A (In his classic letters to the Royal Society of London,
Leeuwenhoek termed the moving organisms he observed in pond water and teeth
scrapings "animalcules").
Would you like to review solidifying agents in culture media (agar properties) or
Koch's techniques for pure culture isolation next?
Yes
Of the following scientists, who first promulgated the theory of abiogenesis?
a. Aristotle
b. Pasteur
c. Needham
d. Spallanzani -ANSWER✔✔a. Aristotle
Which of the following scientists hypothesized that a bacterial colony arises from a
single bacterial cell?
a. Ann van Leeuwenhoek
b. Louis Pasteur
,c. Robert Koch
d. Richard Petri -ANSWER✔✔c. Robert Koch
Which scientist first hypothesized that medical personnel could infect patients with
pathogens?
a. Edward Jenner
b. Joseph lister
c. John Snow
d. Ignaz Semmelweis -ANSWER✔✔d. Ignaz Semmelweis
1. Leeuwenhoek described microorganisms as _________
a. Animalcules
b. Prokaryotes
c. Eukaryotes
d. Protozoa -ANSWER✔✔a. Animalcules
Which of the following favored the theory of spontaneous generation?
a. Spallanzani
b. Needham
c. Pasteur
d. Koch -ANSWER✔✔b. Needham
, 1. A scientist who studies the role of microorganisms in the environment is a(n)
_________.
a. Genetic technologist
b. Earth microbiologist
c. Epidemiologist
d. Environmental microbiologist -ANSWER✔✔d. Environmental microbiologist
1. The laboratory of Robert Koch contributed which of the following to the field of
microbiology?
a. Simple staining
b. Use of petri dish
c. First photomicrograph of bacteria
d. All the above -ANSWER✔✔d. All the above
What does the science of microbiology study?
a. all life forms
b. disease-causing life forms
c. bacteria
d. life forms too small to see with the unaided eye -ANSWER✔✔d. life forms too
small to see with the unaided eye
Are most microorganisms harmful or harmless to people?
