#1
Which of the following is the genetic material in viruses?
RNA
ExplanationRNA serves as the genetic material in viruses.
#2
What is the primary determinant of host range in viruses?
Viral receptor interaction
ExplanationViral receptor interaction determines the host range in viruses.
#3
What is the primary mode of transmission for the human papillomavirus (HPV)?
Sexual contact
ExplanationHPV is primarily transmitted through sexual contact.
#4
What is the main difference between positive-sense and negative-sense RNA viruses?
The orientation of their RNA genome
ExplanationThe main difference lies in the orientation of the RNA genome.
#5
What is the primary mode of transmission for the hepatitis A virus?
Fecal-oral route
ExplanationHepatitis A virus is primarily transmitted through the fecal-oral route.
#6
What is the viral capsid composed of?
Proteins
ExplanationThe viral capsid is composed of proteins.
#7
Which type of viral replication results in the destruction of the host cell?
Lytic replication
ExplanationLytic replication results in the destruction of the host cell.
#8
Which enzyme is responsible for the replication of RNA in negative-sense RNA viruses?
RNA polymerase
ExplanationRNA polymerase is responsible for replicating RNA in negative-sense RNA viruses.
#9
In which cellular organelle does the assembly of most enveloped viruses take place?
Golgi apparatus
ExplanationMost enveloped viruses assemble in the Golgi apparatus.
#10
Which type of virus can integrate its genome into the host cell's genome and remain dormant for an extended period?
Herpesvirus
ExplanationHerpesviruses can integrate their genome into the host cell's genome and remain dormant.
#11
Which enzyme is responsible for cleaving precursor polyproteins into functional viral proteins in many positive-sense RNA viruses?
Protease
ExplanationProtease cleaves precursor polyproteins into functional viral proteins in positive-sense RNA viruses.
#12
Which class of viruses possesses a circular, double-stranded DNA genome?
Papillomaviridae
ExplanationPapillomaviridae viruses possess a circular, double-stranded DNA genome.
#13
What is the role of reverse transcriptase in retroviruses?
Replication of RNA
ExplanationReverse transcriptase replicates RNA in retroviruses.
#14
What is antigenic shift in the context of viral evolution?
Exchange of genetic material between two different viruses
ExplanationAntigenic shift involves the exchange of genetic material between different viruses.
#15
What is the primary function of viral neuraminidase during the influenza virus life cycle?
Release of virions from host cells
ExplanationViral neuraminidase facilitates the release of virions from host cells.
#16
Which viral family does the human immunodeficiency virus (HIV) belong to?
Retroviridae
ExplanationHIV belongs to the Retroviridae viral family.
#17
What is the function of the viral matrix protein in enveloped viruses?
Provides structural support
ExplanationThe viral matrix protein provides structural support in enveloped viruses.
#18
What is the significance of the viral envelope in certain viruses?
Facilitates viral entry into host cells
ExplanationThe viral envelope facilitates viral entry into host cells.
#19
What is the primary target of the human immunodeficiency virus (HIV) in the human body?
T lymphocytes
ExplanationT lymphocytes are the primary target of HIV in the human body.