8-L2

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Questions and Answers

What is a common characteristic of viruses?

  • Being able to multiply outside of living cells
  • Being too large to pass through filters
  • Being seen with an ordinary light microscope
  • Being an obligate intracellular parasite (correct)

What do viruses contain?

  • Either a RNA or DNA genome (correct)
  • Both RNA and DNA genome
  • Only RNA genome
  • Only DNA genome

What is true about the composition of viruses?

  • They contain polysaccharides
  • They contain small ions
  • They do not contain lipids
  • They may or may not contain lipids (correct)

What is the shape of some viral capsids?

<p>Either Helical or Icosahedral (B)</p> Signup and view all the answers

What is the status of viruses in terms of living or nonliving?

<p>Viruses are nonliving things (A)</p> Signup and view all the answers

What do viruses depend on for propagation?

<p>Specialized host cells (A)</p> Signup and view all the answers

What is the size range of viruses?

<p>18-350 nm (A)</p> Signup and view all the answers

What is the primary function of the capsid?

<p>To protect the delicate inner nucleic acid from harsh environmental conditions (C)</p> Signup and view all the answers

Why are viruses considered obligate intracellular parasites?

<p>They can only replicate in a host cell (A)</p> Signup and view all the answers

What is the term for the process by which a virus acquires its envelope from the host cell membrane?

<p>Budding (A)</p> Signup and view all the answers

What is the function of the genetic information in a virus?

<p>To serve as mRNA and be directly translated into protein (A)</p> Signup and view all the answers

What is the term for viruses that contain only the viral nucleic acid and the capsid?

<p>Non-enveloped viruses (C)</p> Signup and view all the answers

What is the role of virally encoded proteins in the viral envelope?

<p>To play a major role in the viral life cycle, including attachment and fusion (B)</p> Signup and view all the answers

What is the term for the individual subunits that make up the capsid?

<p>Capsomers (B)</p> Signup and view all the answers

Which of the following viruses is an example of a double-stranded DNA virus?

<p>Adenovirus (B)</p> Signup and view all the answers

What is the characteristic of a viral genome that is unsegmented?

<p>It consists of a single piece of RNA or DNA (A)</p> Signup and view all the answers

What are the two basic structures of the capsid?

<p>Icosahedral and Helical (C)</p> Signup and view all the answers

What is the primary function of the capsid in a virus?

<p>To surround and protect the genome (C)</p> Signup and view all the answers

What type of nucleic acid can be found in a virus genome?

<p>Either DNA or RNA, but not both (D)</p> Signup and view all the answers

What is the term for the genome surrounded by a capsid?

<p>Nucleocapsid (B)</p> Signup and view all the answers

What is the origin of the lipid component of a viral envelope?

<p>The host cell membrane (B)</p> Signup and view all the answers

What is the purpose of the spikes on a virus?

<p>To attach the virus to the host cell (A)</p> Signup and view all the answers

What is the term for the smaller subunits that make up a capsid?

<p>Capsomeres (D)</p> Signup and view all the answers

Which virus is responsible for causing encephalitis?

<p>JC virus (D)</p> Signup and view all the answers

What is the name of the virus that causes pharyngitis?

<p>Adenovirus (B)</p> Signup and view all the answers

Which virus causes gingivostomatitis?

<p>All of the above (D)</p> Signup and view all the answers

What is the name of the virus that causes cardiovascular infections?

<p>Coxsackie B virus (C)</p> Signup and view all the answers

Which virus causes hepatitis?

<p>All of the above (D)</p> Signup and view all the answers

What is the name of the virus that causes skin infections?

<p>All of the above (D)</p> Signup and view all the answers

Which virus causes pneumonia?

<p>All of the above (D)</p> Signup and view all the answers

What is the name of the virus that causes myelitis?

<p>Poliovirus (C)</p> Signup and view all the answers

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