Chamberlain College of Nursing | BIOS 242 Fundamentals of Microbiology
BIOS 242 Fundamentals of Microbiology
Exam 3 Comprehensive Examination
2026/2027 | Verified Questions
Chamberlain College of Nursing | BIOS 242 Fundamentals of Microbiology | University-Level Nursing
Students
50 Verified Questions | 4 Core Domains | Academic Year 2026/2027
Prepared by
Chamberlain College of Nursing | BIOS 242 Fundamentals of Microbiology
Examination 3 Actual Exam | Academic Year 2026/2027
BIOS 242 Fundamentals of Microbiology Exam 3 Comprehensive Examination 2026/2027 | Verified Questions
, INTRODUCTION
This Examination 3 Comprehensive Examination contains 50 verified questions designed for university-
level nursing students enrolled in BIOS 242 Fundamentals of Microbiology at Chamberlain College of
Nursing. The questions are distributed across four core domains: Microbial Genetics and DNA
Technology (13 questions), Microbial Metabolism and Growth (13 questions), Host Defenses and Immune
Response (12 questions), and Microbial Diseases and Epidemiology (12 questions). All content is original
and constructed to reinforce the official BIOS 242 Examination 3 course objectives for actual exam
readiness and clinical proficiency, aligned to the 2026/2027 academic year. Each item emphasizes genetic
mechanisms, metabolic pathways, immune defenses, and epidemiological principles drawn from
foundational microbiology methodology.
ACTUAL QUESTIONS
Domain 1: Microbial Genetics and DNA Technology
Question 1. Which process describes the transfer of genetic material from one bacterium to
another by a bacteriophage?
A. Transduction
B. Transformation
C. Conjugation
D. Translation
Correct Answer: A
Rationale: Transduction is the phage-mediated transfer of bacterial DNA from a donor to a recipient
cell. Transformation involves uptake of naked DNA, conjugation requires direct cell-to-cell contact via a
pilus, and translation is protein synthesis.
Question 2. A mutation that changes a single nucleotide and results in a premature stop
codon is classified as which type?
A. Silent mutation
B. Missense mutation
C. Nonsense mutation
D. Frameshift mutation
Correct Answer: C
Rationale: A nonsense mutation converts a sense codon into a stop codon, prematurely terminating
translation. Silent mutations do not change the amino acid; missense mutations substitute one amino
acid; frameshift mutations alter the reading frame.
Question 3. Which enzyme is responsible for synthesizing a complementary DNA strand
using an RNA template during reverse transcription?
A. DNA polymerase III
B. Reverse transcriptase
C. RNA polymerase
D. Ligase
Correct Answer: B
Rationale: Reverse transcriptase, carried by retroviruses, synthesizes DNA from an RNA template. This
enzyme is essential for the replication of RNA viruses such as HIV and is a target of antiretroviral
therapy.
Question 4. What is the primary function of a plasmid in bacterial cells?
A. To serve as the main chromosomal DNA
BIOS 242 Fundamentals of Microbiology Exam 3 Comprehensive Examination 2026/2027 | Verified Questions
BIOS 242 Fundamentals of Microbiology
Exam 3 Comprehensive Examination
2026/2027 | Verified Questions
Chamberlain College of Nursing | BIOS 242 Fundamentals of Microbiology | University-Level Nursing
Students
50 Verified Questions | 4 Core Domains | Academic Year 2026/2027
Prepared by
Chamberlain College of Nursing | BIOS 242 Fundamentals of Microbiology
Examination 3 Actual Exam | Academic Year 2026/2027
BIOS 242 Fundamentals of Microbiology Exam 3 Comprehensive Examination 2026/2027 | Verified Questions
, INTRODUCTION
This Examination 3 Comprehensive Examination contains 50 verified questions designed for university-
level nursing students enrolled in BIOS 242 Fundamentals of Microbiology at Chamberlain College of
Nursing. The questions are distributed across four core domains: Microbial Genetics and DNA
Technology (13 questions), Microbial Metabolism and Growth (13 questions), Host Defenses and Immune
Response (12 questions), and Microbial Diseases and Epidemiology (12 questions). All content is original
and constructed to reinforce the official BIOS 242 Examination 3 course objectives for actual exam
readiness and clinical proficiency, aligned to the 2026/2027 academic year. Each item emphasizes genetic
mechanisms, metabolic pathways, immune defenses, and epidemiological principles drawn from
foundational microbiology methodology.
ACTUAL QUESTIONS
Domain 1: Microbial Genetics and DNA Technology
Question 1. Which process describes the transfer of genetic material from one bacterium to
another by a bacteriophage?
A. Transduction
B. Transformation
C. Conjugation
D. Translation
Correct Answer: A
Rationale: Transduction is the phage-mediated transfer of bacterial DNA from a donor to a recipient
cell. Transformation involves uptake of naked DNA, conjugation requires direct cell-to-cell contact via a
pilus, and translation is protein synthesis.
Question 2. A mutation that changes a single nucleotide and results in a premature stop
codon is classified as which type?
A. Silent mutation
B. Missense mutation
C. Nonsense mutation
D. Frameshift mutation
Correct Answer: C
Rationale: A nonsense mutation converts a sense codon into a stop codon, prematurely terminating
translation. Silent mutations do not change the amino acid; missense mutations substitute one amino
acid; frameshift mutations alter the reading frame.
Question 3. Which enzyme is responsible for synthesizing a complementary DNA strand
using an RNA template during reverse transcription?
A. DNA polymerase III
B. Reverse transcriptase
C. RNA polymerase
D. Ligase
Correct Answer: B
Rationale: Reverse transcriptase, carried by retroviruses, synthesizes DNA from an RNA template. This
enzyme is essential for the replication of RNA viruses such as HIV and is a target of antiretroviral
therapy.
Question 4. What is the primary function of a plasmid in bacterial cells?
A. To serve as the main chromosomal DNA
BIOS 242 Fundamentals of Microbiology Exam 3 Comprehensive Examination 2026/2027 | Verified Questions
