BIOS 242 Week 6 Quiz Exam 3 (Latest
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. Which type of pathogen lacks cellular structure?
A. Bacteria
B. Virus
C. Fungus
D. Protozoa
Correct Answer: B. Virus
Rationale: Viruses are acellular and require host cells to replicate.
2. What is the basic structure of a virus?
A. Cell wall and nucleus
B. DNA and ribosomes
C. Nucleic acid and protein coat
D. Cytoplasm and organelles
Correct Answer: C. Nucleic acid and protein coat
Rationale: Viruses consist of genetic material and a capsid.
,3. What is a capsid?
A. Viral enzyme
B. Protein coat of virus
C. Host cell
D. Antibody
Correct Answer: B. Protein coat of virus
Rationale: Capsid protects viral genetic material.
4. Which virus contains RNA instead of DNA?
A. DNA virus
B. Retrovirus
C. Bacteriophage
D. Prion
Correct Answer: B. Retrovirus
Rationale: Retroviruses use RNA as genetic material.
5. What is a bacteriophage?
A. Virus infecting bacteria
B. Bacteria infecting viruses
C. Fungus
D. Parasite
Correct Answer: A. Virus infecting bacteria
Rationale: Bacteriophages specifically infect bacterial cells.
6. What is the lytic cycle?
,A. Viral dormancy
B. Viral replication and host destruction
C. Antibody production
D. Clot formation
Correct Answer: B. Viral replication and host destruction
Rationale: Lytic cycle leads to cell lysis and release of new viruses.
7. What is the lysogenic cycle?
A. Immediate replication
B. Viral DNA integrates into host genome
C. Host cell destruction
D. Immune response
Correct Answer: B. Viral DNA integrates into host genome
Rationale: Virus remains dormant within host DNA.
8. What is a provirus?
A. Active virus
B. Viral DNA in host genome
C. Antibody
D. Clotting factor
Correct Answer: B. Viral DNA in host genome
Rationale: Provirus is integrated viral DNA.
9. Which enzyme is used by retroviruses to make DNA?
, A. DNA polymerase
B. Reverse transcriptase
C. RNA polymerase
D. Ligase
Correct Answer: B. Reverse transcriptase
Rationale: Converts RNA into DNA.
10. What is host specificity?
A. Virus infects any cell
B. Virus infects specific cells
C. Immune response
D. Clotting
Correct Answer: B. Virus infects specific cells
Rationale: Viruses bind to specific receptors.
11. What is a viral envelope?
A. DNA layer
B. Lipid membrane
C. Protein coat
D. Cytoplasm
Correct Answer: B. Lipid membrane
Rationale: Envelope surrounds some viruses.
12. What is a spike protein?
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. Which type of pathogen lacks cellular structure?
A. Bacteria
B. Virus
C. Fungus
D. Protozoa
Correct Answer: B. Virus
Rationale: Viruses are acellular and require host cells to replicate.
2. What is the basic structure of a virus?
A. Cell wall and nucleus
B. DNA and ribosomes
C. Nucleic acid and protein coat
D. Cytoplasm and organelles
Correct Answer: C. Nucleic acid and protein coat
Rationale: Viruses consist of genetic material and a capsid.
,3. What is a capsid?
A. Viral enzyme
B. Protein coat of virus
C. Host cell
D. Antibody
Correct Answer: B. Protein coat of virus
Rationale: Capsid protects viral genetic material.
4. Which virus contains RNA instead of DNA?
A. DNA virus
B. Retrovirus
C. Bacteriophage
D. Prion
Correct Answer: B. Retrovirus
Rationale: Retroviruses use RNA as genetic material.
5. What is a bacteriophage?
A. Virus infecting bacteria
B. Bacteria infecting viruses
C. Fungus
D. Parasite
Correct Answer: A. Virus infecting bacteria
Rationale: Bacteriophages specifically infect bacterial cells.
6. What is the lytic cycle?
,A. Viral dormancy
B. Viral replication and host destruction
C. Antibody production
D. Clot formation
Correct Answer: B. Viral replication and host destruction
Rationale: Lytic cycle leads to cell lysis and release of new viruses.
7. What is the lysogenic cycle?
A. Immediate replication
B. Viral DNA integrates into host genome
C. Host cell destruction
D. Immune response
Correct Answer: B. Viral DNA integrates into host genome
Rationale: Virus remains dormant within host DNA.
8. What is a provirus?
A. Active virus
B. Viral DNA in host genome
C. Antibody
D. Clotting factor
Correct Answer: B. Viral DNA in host genome
Rationale: Provirus is integrated viral DNA.
9. Which enzyme is used by retroviruses to make DNA?
, A. DNA polymerase
B. Reverse transcriptase
C. RNA polymerase
D. Ligase
Correct Answer: B. Reverse transcriptase
Rationale: Converts RNA into DNA.
10. What is host specificity?
A. Virus infects any cell
B. Virus infects specific cells
C. Immune response
D. Clotting
Correct Answer: B. Virus infects specific cells
Rationale: Viruses bind to specific receptors.
11. What is a viral envelope?
A. DNA layer
B. Lipid membrane
C. Protein coat
D. Cytoplasm
Correct Answer: B. Lipid membrane
Rationale: Envelope surrounds some viruses.
12. What is a spike protein?
