BIOD 171 ESSENTIAL MICROBIOLOGY
MODULE 6 EXAM
Actual Questions and Verified Answers
100% Guarantee Pass
Portage Learning, Geneva College
Inside you will get:
➢ Module 6 Exam
➢ True & False Questions
➢ Multiple Choice Questions and Answers
➢ Clear images
➢ Expert-Verified Explanations
,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:
Answer choices:
- True
- False
Correct Answer: False
Expert Rationale: Viruses are acellular entities lacking cellular structure
entirely, including any membrane-bound organelles such as nuclei. While
the viral genome is enclosed within a protein capsid, this does not equate
to the presence of a nucleus. Viruses do not possess the cellular
machinery characteristic of either eukaryotic or prokaryotic cells and are
therefore considered separate entities from cellular life domains.
---
2. True or False. Although viruses may contain their genome within an
enclosed space (much like the nucleus of a cell), it is considered
neither eukaryotic nor prokaryotic:
Answer choices:
- True
- False
Correct Answer: True
Expert Rationale: The viral genome is encased within a capsid protein
shell but viruses lack the cellular features that define prokaryotic and
eukaryotic cells. They do not have ribosomes, cytoplasm, membranes, or
,the metabolic pathways of living cells and replicate only inside host cells,
hence they form a distinct biological category known as acellular infectious
agents.
---
3. Describe the two basic components of a virus:
Correct Answer: Genetic material (DNA or RNA) and capsid
Expert Rationale: Viruses universally possess nucleic acid genomes,
which can be double- or single-stranded DNA or RNA, encoding their
genetic blueprint. This nucleic acid is enclosed within a proteinaceous
capsid, which protects the genome and facilitates delivery into host cells.
The capsid is not membranous but is a protein shell assembled from
capsomeres. Some viruses also have envelopes derived from host
membranes, but this is not a universal feature.
---
4. The envelope surrounds the _________ of some viruses:
Answer choices:
- Genome
- Capsid
- Ribosome
- Viral polymerase
Correct Answer: Capsid
Expert Rationale: The viral envelope is a lipid bilayer derived from the
host cell’s membrane during viral budding that completely surrounds the
, capsid. It contains viral glycoproteins essential for host cell recognition and
fusion but does not directly interact with the viral genome; the genome
remains encased within the capsid inside the envelope.
---
5. The ________ surrounds the capsid of some viruses:
Answer choices:
- Envelope
- Genome
- Matrix protein
- RNA polymerase
Correct Answer: Envelope
Expert Rationale: Enveloped viruses have a lipid bilayer membrane
external to the capsid, consisting of a host-derived membrane embedded
with viral glycoproteins. This envelope plays a crucial role in virus-host cell
recognition and entry, contrasting with non-enveloped viruses that lack this
feature.
---
6. True or False. You would expect to see a viral envelope on a virus
infecting a bacterial cell:
Answer choices:
- True
- False
Correct Answer: False
MODULE 6 EXAM
Actual Questions and Verified Answers
100% Guarantee Pass
Portage Learning, Geneva College
Inside you will get:
➢ Module 6 Exam
➢ True & False Questions
➢ Multiple Choice Questions and Answers
➢ Clear images
➢ Expert-Verified Explanations
,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:
Answer choices:
- True
- False
Correct Answer: False
Expert Rationale: Viruses are acellular entities lacking cellular structure
entirely, including any membrane-bound organelles such as nuclei. While
the viral genome is enclosed within a protein capsid, this does not equate
to the presence of a nucleus. Viruses do not possess the cellular
machinery characteristic of either eukaryotic or prokaryotic cells and are
therefore considered separate entities from cellular life domains.
---
2. True or False. Although viruses may contain their genome within an
enclosed space (much like the nucleus of a cell), it is considered
neither eukaryotic nor prokaryotic:
Answer choices:
- True
- False
Correct Answer: True
Expert Rationale: The viral genome is encased within a capsid protein
shell but viruses lack the cellular features that define prokaryotic and
eukaryotic cells. They do not have ribosomes, cytoplasm, membranes, or
,the metabolic pathways of living cells and replicate only inside host cells,
hence they form a distinct biological category known as acellular infectious
agents.
---
3. Describe the two basic components of a virus:
Correct Answer: Genetic material (DNA or RNA) and capsid
Expert Rationale: Viruses universally possess nucleic acid genomes,
which can be double- or single-stranded DNA or RNA, encoding their
genetic blueprint. This nucleic acid is enclosed within a proteinaceous
capsid, which protects the genome and facilitates delivery into host cells.
The capsid is not membranous but is a protein shell assembled from
capsomeres. Some viruses also have envelopes derived from host
membranes, but this is not a universal feature.
---
4. The envelope surrounds the _________ of some viruses:
Answer choices:
- Genome
- Capsid
- Ribosome
- Viral polymerase
Correct Answer: Capsid
Expert Rationale: The viral envelope is a lipid bilayer derived from the
host cell’s membrane during viral budding that completely surrounds the
, capsid. It contains viral glycoproteins essential for host cell recognition and
fusion but does not directly interact with the viral genome; the genome
remains encased within the capsid inside the envelope.
---
5. The ________ surrounds the capsid of some viruses:
Answer choices:
- Envelope
- Genome
- Matrix protein
- RNA polymerase
Correct Answer: Envelope
Expert Rationale: Enveloped viruses have a lipid bilayer membrane
external to the capsid, consisting of a host-derived membrane embedded
with viral glycoproteins. This envelope plays a crucial role in virus-host cell
recognition and entry, contrasting with non-enveloped viruses that lack this
feature.
---
6. True or False. You would expect to see a viral envelope on a virus
infecting a bacterial cell:
Answer choices:
- True
- False
Correct Answer: False
