31 Questions
What is a common characteristic of viruses?
Being an obligate intracellular parasite
What do viruses contain?
Either a RNA or DNA genome
What is true about the composition of viruses?
They may or may not contain lipids
What is the shape of some viral capsids?
Either Helical or Icosahedral
What is the status of viruses in terms of living or nonliving?
Viruses are nonliving things
What do viruses depend on for propagation?
Specialized host cells
What is the size range of viruses?
18-350 nm
What is the primary function of the capsid?
To protect the delicate inner nucleic acid from harsh environmental conditions
Why are viruses considered obligate intracellular parasites?
They can only replicate in a host cell
What is the term for the process by which a virus acquires its envelope from the host cell membrane?
Budding
What is the function of the genetic information in a virus?
To serve as mRNA and be directly translated into protein
What is the term for viruses that contain only the viral nucleic acid and the capsid?
Non-enveloped viruses
What is the role of virally encoded proteins in the viral envelope?
To play a major role in the viral life cycle, including attachment and fusion
What is the term for the individual subunits that make up the capsid?
Capsomers
Which of the following viruses is an example of a double-stranded DNA virus?
Adenovirus
What is the characteristic of a viral genome that is unsegmented?
It consists of a single piece of RNA or DNA
What are the two basic structures of the capsid?
Icosahedral and Helical
What is the primary function of the capsid in a virus?
To surround and protect the genome
What type of nucleic acid can be found in a virus genome?
Either DNA or RNA, but not both
What is the term for the genome surrounded by a capsid?
Nucleocapsid
What is the origin of the lipid component of a viral envelope?
The host cell membrane
What is the purpose of the spikes on a virus?
To attach the virus to the host cell
What is the term for the smaller subunits that make up a capsid?
Capsomeres
Which virus is responsible for causing encephalitis?
JC virus
What is the name of the virus that causes pharyngitis?
Adenovirus
Which virus causes gingivostomatitis?
All of the above
What is the name of the virus that causes cardiovascular infections?
Coxsackie B virus
Which virus causes hepatitis?
All of the above
What is the name of the virus that causes skin infections?
All of the above
Which virus causes pneumonia?
All of the above
What is the name of the virus that causes myelitis?
Poliovirus
Learn about the basic concepts of viruses, including their characteristics, structure, and properties. Discover how they differ from bacteria and their role as infective agents.
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