#1
What is the primary function of a viral capsid?
Facilitate viral entry into host cells
ExplanationCapsids aid in the process of viral entry into host cells by promoting attachment and facilitating the release of viral genetic material.
#2
Which step is a common feature of both lytic and lysogenic cycles in bacteriophages?
Injection of viral genetic material into the host cell
ExplanationBoth lytic and lysogenic cycles involve the injection of viral genetic material into the host cell, initiating different pathways of infection.
#3
Which cellular organelle is involved in the processing and packaging of newly synthesized viral proteins?
Golgi apparatus
ExplanationThe Golgi apparatus plays a role in processing and packaging newly synthesized viral proteins, preparing them for release or incorporation into virions.
#4
What is the primary target of antiretroviral drugs in the treatment of HIV?
Viral integrase
ExplanationAntiretroviral drugs target the viral integrase enzyme to inhibit the integration of HIV DNA into the host genome.
#5
What is the role of the viral protease enzyme in the late stages of the viral life cycle?
Cleave viral polyproteins into functional proteins
ExplanationViral protease plays a crucial role in the late stages of the viral life cycle by cleaving viral polyproteins into functional proteins, essential for virion assembly.
#6
Which of the following is a common target for antiviral drugs?
Nucleic acids
ExplanationAntiviral drugs often target the genetic material of viruses, disrupting their replication by inhibiting nucleic acid synthesis.
#7
What is the main enzyme responsible for viral RNA replication?
RNA polymerase
ExplanationRNA polymerase is crucial for synthesizing RNA copies of the viral genome during the replication phase of the viral life cycle.
#8
What is the primary purpose of the viral envelope?
Facilitate attachment to host cells
ExplanationThe viral envelope aids in host cell attachment, a crucial step in the initiation of viral infection.
#9
In the context of viral replication, what is meant by the term 'budding'?
Release of mature virions from the host cell
ExplanationBudding is the process where mature virions are released from the host cell, completing the viral replication cycle.
#10
What is a common characteristic of retroviruses regarding their genome?
Single-stranded RNA genome
ExplanationRetroviruses have a single-stranded RNA genome, which is reverse transcribed into DNA upon entering the host cell.
#11
What is the function of the viral polymerase in the context of RNA viruses?
Replicate the viral genome
ExplanationThe viral polymerase is responsible for replicating the RNA genome of RNA viruses during the viral replication cycle.
#12
Which of the following viruses is an enveloped virus?
Influenza virus
ExplanationEnveloped viruses, like the influenza virus, have an outer lipid envelope that plays a role in host cell attachment and entry.
#13
What is the role of the viral integrase enzyme in the retroviral life cycle?
Integrate viral DNA into the host genome
ExplanationIntegrase facilitates the permanent integration of viral DNA into the host genome, a key step in the retroviral life cycle.
#14
Which type of viral genome requires the synthesis of a complementary RNA strand during replication?
Single-stranded RNA
ExplanationSingle-stranded RNA viruses need to synthesize a complementary RNA strand during replication, serving as a template for protein synthesis.
#15
What is a viroid?
A small infectious RNA molecule
ExplanationViroids are small infectious RNA molecules that lack a protein coat but can cause diseases in plants.
#16
Which viral replication strategy involves the integration of viral DNA into the host genome and a long-term relationship with the host cell?
Lysogenic cycle
ExplanationThe lysogenic cycle involves the integration of viral DNA into the host genome, establishing a long-term relationship with the host cell.
#17
In the context of viral entry, what is the role of viral spikes or glycoproteins?
Facilitate attachment to host cells
ExplanationViral spikes or glycoproteins play a crucial role in facilitating the attachment of the virus to host cells during the entry phase of the viral life cycle.