#1
What is the primary function of the viral capsid?
Protect the viral genetic material
ExplanationGenetic material protection.
#2
What is a virion?
A single viral particle outside the host cell
ExplanationSingle viral particle.
#3
Which of the following viruses belongs to the retrovirus family?
HIV (Human Immunodeficiency Virus)
ExplanationBelongs to retrovirus family.
#4
Which of the following is a characteristic feature of a viral envelope?
Lipid bilayer derived from the host cell membrane
ExplanationDerived lipid bilayer.
#5
Which nucleic acids are found in the genomes of viruses?
Both DNA and RNA
ExplanationBoth DNA and RNA.
#6
What is the primary determinant of a virus's host range?
Host cell receptors
ExplanationHost cell receptors.
#7
What is the role of neuraminidase in the influenza virus?
Cleaves sialic acid to release virions from host cells
ExplanationSialic acid cleavage for virion release.
#8
What is the function of viral spikes (glycoproteins) on the viral envelope?
Facilitate attachment to host cells
ExplanationFacilitate host cell attachment.
#9
Which cellular organelle is often involved in the assembly of enveloped viruses?
Golgi apparatus
ExplanationInvolved in enveloped virus assembly.
#10
Which enzyme is essential for the replication of retroviruses?
Reverse transcriptase
ExplanationEssential for retrovirus replication.
#11
Which structural protein is responsible for the helical symmetry observed in some viruses?
Nucleocapsid
ExplanationResponsible for helical symmetry.
#12
What is a viroid?
A circular RNA molecule causing plant diseases
ExplanationCircular RNA causing plant diseases.
#13
Which of the following is a characteristic feature of a retrovirus?
Reverse transcription of viral RNA into DNA
ExplanationRNA to DNA transcription.
#14
What is the role of the viral matrix protein in virus assembly?
Anchors the viral envelope proteins to the capsid
ExplanationAnchors envelope proteins to capsid.
#15
What is the main function of the viral protease during the viral life cycle?
Cleaves viral polyproteins to produce functional proteins
ExplanationCleaves polyproteins for functional proteins.