#1
What is the primary mode of transmission for poliovirus?
Fecal-oral route
ExplanationPoliovirus is primarily transmitted through the fecal-oral route.
#2
Which viral family does the Zika virus belong to?
Flaviviridae
ExplanationThe Zika virus belongs to the Flaviviridae viral family.
#3
Which of the following is NOT a step in the lytic cycle of viral replication?
Integration
ExplanationIntegration is not a step in the lytic cycle of viral replication.
#4
Which type of vaccine uses a weakened form of the virus to stimulate an immune response?
Live attenuated vaccine
ExplanationLive attenuated vaccines use a weakened form of the virus to stimulate an immune response.
#5
Which of the following viruses is known for causing hand, foot, and mouth disease in humans?
Coxsackievirus
ExplanationCoxsackievirus is known for causing hand, foot, and mouth disease in humans.
#6
Which viral family does the Ebola virus belong to?
Filoviridae
ExplanationThe Ebola virus belongs to the Filoviridae viral family.
#7
Which stage of viral replication involves the assembly of new viral particles?
Maturation
ExplanationThe maturation stage of viral replication involves the assembly of new viral particles.
#8
Which viral family does the measles virus belong to?
Paramyxoviridae
ExplanationThe measles virus belongs to the Paramyxoviridae viral family.
#9
Which of the following viruses is responsible for causing chickenpox?
Varicella-zoster virus
ExplanationVaricella-zoster virus is responsible for causing chickenpox.
#10
Which viral family does the rabies virus belong to?
Rhabdoviridae
ExplanationThe rabies virus belongs to the Rhabdoviridae viral family.
#11
Which enzyme is responsible for the synthesis of DNA from an RNA template during retroviral replication?
Reverse transcriptase
ExplanationReverse transcriptase synthesizes DNA from an RNA template during retroviral replication.
#12
Which of the following viruses is known for its segmented genome?
Influenza virus
ExplanationInfluenza virus is known for having a segmented genome.
#13
Which of the following is a mechanism used by viruses to evade host immune responses?
Antigenic variation
ExplanationAntigenic variation is a mechanism used by viruses to evade host immune responses.
#14
Which virus is associated with the development of cervical cancer?
Human papillomavirus
ExplanationHuman papillomavirus is associated with the development of cervical cancer.
#15
Which viral enzyme is essential for the synthesis of mRNA from a DNA template in eukaryotic cells?
RNA polymerase
ExplanationRNA polymerase is essential for the synthesis of mRNA from a DNA template in eukaryotic cells.
#16
Which of the following is an example of an enveloped virus?
Influenza virus
ExplanationInfluenza virus is an example of an enveloped virus.
#17
Which viral enzyme is responsible for cleaving viral polyproteins into functional proteins?
Protease
ExplanationProtease is responsible for cleaving viral polyproteins into functional proteins.
#18
Which virus is responsible for causing acquired immunodeficiency syndrome (AIDS)?
Human immunodeficiency virus (HIV)
ExplanationHIV is responsible for causing acquired immunodeficiency syndrome (AIDS).
#19
Which viral enzyme is involved in the synthesis of complementary DNA (cDNA) from an RNA template in retroviruses?
Reverse transcriptase
ExplanationReverse transcriptase is involved in the synthesis of cDNA from an RNA template in retroviruses.
#20
Which virus is associated with the development of infectious mononucleosis?
Epstein-Barr virus
ExplanationEpstein-Barr virus is associated with the development of infectious mononucleosis.
#21
What is a characteristic feature of negative-sense RNA viruses?
They require RNA-dependent RNA polymerase for replication
ExplanationNegative-sense RNA viruses require RNA-dependent RNA polymerase for replication.
#22
Which enzyme is responsible for the integration of viral DNA into the host genome in lysogenic replication?
Integrase
ExplanationIntegrase is responsible for the integration of viral DNA into the host genome in lysogenic replication.
#23
Which type of viral genome consists of both single-stranded positive-sense and negative-sense RNA?
Ambisense genome
ExplanationAmbisense genome consists of both single-stranded positive-sense and negative-sense RNA.
#24
Which type of viral mutation results in the substitution of one nucleotide for another?
Point mutation
ExplanationA point mutation results in the substitution of one nucleotide for another.
#25
Which type of viral mutation involves the insertion or deletion of nucleotides, resulting in a shift in the reading frame?
Frameshift mutation
ExplanationFrameshift mutation involves the insertion or deletion of nucleotides, resulting in a shift in the reading frame.