PORTAGE LEARNING BIOD 171 MICROBIOLOGY WITH LAB
CORE MODULE 1 EXAM REVIEW | COMPLETE PRACTICE
TEST BANK QUESTIONS AND ANSWERS | VERIFIED
SOLUTIONS | LATEST 2026/2027 VERSION COMPLETE
STUDY GUIDE
Examiner/Administrator: Portage Learning / Geneva College
PORTAGE LEARNING BIOD 171 MICROBIOLOGY WITH LAB
MODULE 1 EXAM REVIEW
2026/2027 EDITION
COMPLETE PRACTICE EXAM WITH VISUAL ANALYSIS
30 MULTIPLE-CHOICE QUESTIONS (VOLUME I)
EXACT OFFICIAL COUNT: 30 QUESTIONS
PASSING SCORE: 70%
TESTING TIME: 45 MINUTES
PORTAGE LEARNING || ALIGNED WITH BIOD 171 AND BIOL
271 MICROBIOLOGY CURRICULUMS || ACCREDITED HIGHER
EDUCATION ASSESSMENTS || LOCKDOWN BROWSER
,COMPATIBLE CORE STANDARDS || VERIFIED SOLUTIONS |
GRADED A+ || COMPREHENSIVE MODULE 1 REVIEW ||
PREPARED FOR HEALTHCARE & NURSING PREREQUISITES
|| SYSTEMATIC ACADEMIC USE ONLY
PART I: FUNDAMENTALS OF MICROBIOLOGY &
HISTORICAL PERSPECTIVES (Q1–Q10)
Q1. A clinical laboratory scientist is reviewing a slide of an
unidentified microorganism isolated from a hot spring. The
organism is unicellular, lacks a nuclear membrane, contains a
pseudopeptidoglycan cell wall, and thrives in high-temperature,
high-salinity environments. Based on these characteristics, into
which of the following domains should this microorganism be
classified?
A. Eukarya
B. Bacteria
C. Archaea
D. Protista
Correct Answer: 🔴 C. Archaea
Explanation: 🔹 The domain Archaea is comprised of prokaryotic,
unicellular microorganisms that lack a true nucleus or membrane-
bound organelles. A distinguishing biochemical feature of Archaea
,is that their cell walls lack true peptidoglycan, containing
pseudopeptidoglycan (pseudomurein) instead. Furthermore, they
possess unique ether-linked membrane lipids that allow them to
survive in extreme ecological niches, such as hydrothermal vents
and hypersaline environments (extremophiles). Option A is
incorrect because Eukarya possess a membrane-bound nucleus.
Option B is incorrect because Bacteria contain true peptidoglycan
cell walls and ester-linked lipids. Option D is incorrect because
Protista is a kingdom within the domain Eukarya.
Q2. Imagine a hypothetical compound that selectively disrupts the
synthesis of chitin. If this compound were introduced to a mixed
culture containing bacteria, protozoa, fungi, and viruses, which
group of organisms would be specifically inhibited?
A. Fungi
B. Bacteria
C. Protozoa
D. Viruses
Correct Answer: 🔴 A. Fungi
Explanation: 🔹 Fungi are eukaryotic organisms possessing rigid
cell walls primarily composed of chitin and glucans. Disruption of
chitin synthesis selectively targets fungal cell wall integrity, leading
to osmotic lysis and cell death without harming organisms lacking
, chitin. Option B is incorrect because bacterial cell walls are
composed of peptidoglycan. Option C is incorrect because
protozoa lack a cell wall entirely, possessing a flexible outer
pellicle or plasma membrane. Option D is incorrect because
viruses are non-cellular entities containing a protein capsid and
nucleic acid core, lacking any cell wall structures.
Q3. During a laboratory simulation of Louis Pasteur’s famous
swan-neck flask experiments, a student accidentally breaks the
curved neck off the flask after boiling the nutrient broth, leaving the
flask open vertically to the air. What is the expected biological
outcome over the subsequent 48 hours, and what scientific theory
does this outcome disprove?
A. The broth remains sterile; disproves the germ theory of
disease.
B. Microorganisms grow in the broth; disproves the theory of
spontaneous generation.
C. Microorganisms grow in the broth; disproves the law of
biogenesis.
D. The broth remains sterile; disproves the theory of abiogenesis.
Correct Answer: 🔴 B. Microorganisms grow in the broth;
disproves the theory of spontaneous generation.
CORE MODULE 1 EXAM REVIEW | COMPLETE PRACTICE
TEST BANK QUESTIONS AND ANSWERS | VERIFIED
SOLUTIONS | LATEST 2026/2027 VERSION COMPLETE
STUDY GUIDE
Examiner/Administrator: Portage Learning / Geneva College
PORTAGE LEARNING BIOD 171 MICROBIOLOGY WITH LAB
MODULE 1 EXAM REVIEW
2026/2027 EDITION
COMPLETE PRACTICE EXAM WITH VISUAL ANALYSIS
30 MULTIPLE-CHOICE QUESTIONS (VOLUME I)
EXACT OFFICIAL COUNT: 30 QUESTIONS
PASSING SCORE: 70%
TESTING TIME: 45 MINUTES
PORTAGE LEARNING || ALIGNED WITH BIOD 171 AND BIOL
271 MICROBIOLOGY CURRICULUMS || ACCREDITED HIGHER
EDUCATION ASSESSMENTS || LOCKDOWN BROWSER
,COMPATIBLE CORE STANDARDS || VERIFIED SOLUTIONS |
GRADED A+ || COMPREHENSIVE MODULE 1 REVIEW ||
PREPARED FOR HEALTHCARE & NURSING PREREQUISITES
|| SYSTEMATIC ACADEMIC USE ONLY
PART I: FUNDAMENTALS OF MICROBIOLOGY &
HISTORICAL PERSPECTIVES (Q1–Q10)
Q1. A clinical laboratory scientist is reviewing a slide of an
unidentified microorganism isolated from a hot spring. The
organism is unicellular, lacks a nuclear membrane, contains a
pseudopeptidoglycan cell wall, and thrives in high-temperature,
high-salinity environments. Based on these characteristics, into
which of the following domains should this microorganism be
classified?
A. Eukarya
B. Bacteria
C. Archaea
D. Protista
Correct Answer: 🔴 C. Archaea
Explanation: 🔹 The domain Archaea is comprised of prokaryotic,
unicellular microorganisms that lack a true nucleus or membrane-
bound organelles. A distinguishing biochemical feature of Archaea
,is that their cell walls lack true peptidoglycan, containing
pseudopeptidoglycan (pseudomurein) instead. Furthermore, they
possess unique ether-linked membrane lipids that allow them to
survive in extreme ecological niches, such as hydrothermal vents
and hypersaline environments (extremophiles). Option A is
incorrect because Eukarya possess a membrane-bound nucleus.
Option B is incorrect because Bacteria contain true peptidoglycan
cell walls and ester-linked lipids. Option D is incorrect because
Protista is a kingdom within the domain Eukarya.
Q2. Imagine a hypothetical compound that selectively disrupts the
synthesis of chitin. If this compound were introduced to a mixed
culture containing bacteria, protozoa, fungi, and viruses, which
group of organisms would be specifically inhibited?
A. Fungi
B. Bacteria
C. Protozoa
D. Viruses
Correct Answer: 🔴 A. Fungi
Explanation: 🔹 Fungi are eukaryotic organisms possessing rigid
cell walls primarily composed of chitin and glucans. Disruption of
chitin synthesis selectively targets fungal cell wall integrity, leading
to osmotic lysis and cell death without harming organisms lacking
, chitin. Option B is incorrect because bacterial cell walls are
composed of peptidoglycan. Option C is incorrect because
protozoa lack a cell wall entirely, possessing a flexible outer
pellicle or plasma membrane. Option D is incorrect because
viruses are non-cellular entities containing a protein capsid and
nucleic acid core, lacking any cell wall structures.
Q3. During a laboratory simulation of Louis Pasteur’s famous
swan-neck flask experiments, a student accidentally breaks the
curved neck off the flask after boiling the nutrient broth, leaving the
flask open vertically to the air. What is the expected biological
outcome over the subsequent 48 hours, and what scientific theory
does this outcome disprove?
A. The broth remains sterile; disproves the germ theory of
disease.
B. Microorganisms grow in the broth; disproves the theory of
spontaneous generation.
C. Microorganisms grow in the broth; disproves the law of
biogenesis.
D. The broth remains sterile; disproves the theory of abiogenesis.
Correct Answer: 🔴 B. Microorganisms grow in the broth;
disproves the theory of spontaneous generation.
