BIOD 171
BIOD 171 Microbiology Module 6 Exam – Portage learning
2026/2027 Actual Exam
Gradegurus
This exam contains:
❖ BIOD 171 Microbiology Module 6 Exam
❖ Portage learning 2026/2027 Actual Exam
,Microbiology: Viruses — Questions, Correct Answers &
Rationales
Below is a complete review of the quiz content, organized with each question, its answer
choices (where applicable), the correct answer, and a rationale explaining why.
Page 1
1. True or False. Because the genome is contained within an enclosed space (much like
the nucleus of a cell), viruses are classified as eukaryotic.
, A. True
B. False
Correct Answer: B. False
Rationale: Viruses are not classified as prokaryotic or eukaryotic. They are acellular (not
made of cells) and are considered obligate intracellular parasites. The "enclosed space"
is a protein capsid, not a true nucleus.
2. Describe the two basic components of a virus.
Correct Answer: A virus has genomic material made up of either DNA or RNA, and a
capsid, which is a protective structure that contains the genetic material.
Rationale: All viruses minimally consist of (1) a nucleic acid genome (DNA or RNA) and
(2) a protein capsid that surrounds and protects the genome.
3. The______ surrounds the capsid of some viruses.
Correct Answer: envelope
Rationale: Some viruses have an additional outer lipid bilayer called an envelope,
derived from the host cell membrane, that surrounds the capsid.
4. True or False. You would expect to see a viral envelope on a virus infecting a
bacterial cell.
A. True
B. False
Correct Answer: B. False
Rationale: Bacteriophages (viruses that infect bacteria) are generally non-enveloped.
Enveloped viruses are more commonly associated with animal viruses.
BIOD 171 Microbiology Module 6 Exam – Portage learning
2026/2027 Actual Exam
Gradegurus
This exam contains:
❖ BIOD 171 Microbiology Module 6 Exam
❖ Portage learning 2026/2027 Actual Exam
,Microbiology: Viruses — Questions, Correct Answers &
Rationales
Below is a complete review of the quiz content, organized with each question, its answer
choices (where applicable), the correct answer, and a rationale explaining why.
Page 1
1. True or False. Because the genome is contained within an enclosed space (much like
the nucleus of a cell), viruses are classified as eukaryotic.
, A. True
B. False
Correct Answer: B. False
Rationale: Viruses are not classified as prokaryotic or eukaryotic. They are acellular (not
made of cells) and are considered obligate intracellular parasites. The "enclosed space"
is a protein capsid, not a true nucleus.
2. Describe the two basic components of a virus.
Correct Answer: A virus has genomic material made up of either DNA or RNA, and a
capsid, which is a protective structure that contains the genetic material.
Rationale: All viruses minimally consist of (1) a nucleic acid genome (DNA or RNA) and
(2) a protein capsid that surrounds and protects the genome.
3. The______ surrounds the capsid of some viruses.
Correct Answer: envelope
Rationale: Some viruses have an additional outer lipid bilayer called an envelope,
derived from the host cell membrane, that surrounds the capsid.
4. True or False. You would expect to see a viral envelope on a virus infecting a
bacterial cell.
A. True
B. False
Correct Answer: B. False
Rationale: Bacteriophages (viruses that infect bacteria) are generally non-enveloped.
Enveloped viruses are more commonly associated with animal viruses.
