#1
Which of the following is NOT a type of virus?
Bacteria
ExplanationBacteria are prokaryotic organisms, not viruses.
#2
What is the primary function of a virus?
To replicate inside a host cell
ExplanationViruses require host cells for reproduction and replication.
#3
Which of the following is NOT a characteristic of viruses?
They can reproduce independently
ExplanationViruses require host cells for replication and cannot reproduce independently.
#4
What is the term for the protein coat surrounding the viral genome?
Capsid
ExplanationCapsid is the protein shell enclosing the viral nucleic acid.
#5
Which of the following is NOT a step in the lytic cycle of viral replication?
Integration
ExplanationIntegration occurs in the lysogenic cycle, not the lytic cycle.
#6
What is the term for a virus that infects bacteria?
Bacteriophage
ExplanationBacteriophages specifically infect bacterial cells.
#7
Which of the following is a typical viral replication cycle?
Lytic cycle
ExplanationLytic cycle involves virus replication followed by host cell lysis.
#8
Which enzyme is essential for retroviral replication?
Reverse transcriptase
ExplanationReverse transcriptase converts viral RNA into DNA during retroviral replication.
#9
Which of the following is NOT a mechanism of viral entry into host cells?
Exocytosis
ExplanationExocytosis is the process of releasing substances from a cell, not viral entry.
#10
What is the function of viral integrase in the retroviral life cycle?
To integrate viral DNA into the host genome
ExplanationIntegrase facilitates the insertion of viral DNA into the host cell's DNA.
#11
Which of the following is a characteristic feature of retroviruses?
Reverse transcription
ExplanationRetroviruses use reverse transcription to convert RNA into DNA.
#12
What is the role of viral protease in the replication of certain viruses?
To cleave viral proteins into functional units
ExplanationViral protease processes viral proteins into functional components.
#13
What is the function of a viral capsid?
To protect the viral genome
ExplanationCapsid serves as a protective shell for the viral genetic material.
#14
Which viral replication strategy involves the integration of viral DNA into the host genome?
Lysogenic cycle
ExplanationLysogenic cycle involves the integration of viral DNA into the host chromosome.
#15
Which viral replication strategy involves the assembly of new virus particles within the host cell?
Budding
ExplanationBudding involves the formation and release of new virus particles from the host cell membrane.
#16
Which of the following is a method used by viruses to evade the host immune response?
Downregulation of host cell receptors
ExplanationViruses can downregulate host cell receptors to evade immune detection and attack.
#17
Which of the following is a characteristic feature of DNA viruses?
They can integrate their genome into the host chromosome
ExplanationDNA viruses can integrate their genetic material into the host cell's chromosome.