Chapter 24 Flashcards
What are viruses made of?
Proteins and nucleic acids
The capsid of adenovirus is what?
icosahedral
How do viroids differ from viruses?
viroids do not have a capsid
What is a criterion for the classification of viruses?
the presence or absence of an envelope
Give an example of a common vector for human viral disease.
birds
What are some ways to help prevent or treat viruses?
vaccines, antiviral drugs, vector control
How do humans contribute to the increase in newly emerging viral diseases?
inhabiting previously uninhabited lands and contracting new disease agents
During what process does a phage kill its host?
lytic cycle
One viral disease that can occur in different forms at different ages of an infected person is?
varicella
Phage DNA once integrated into a bacteria cell causes the bacteria to become a ___
prophage
Viral Hepatits A is most common spread by what means?
fecal-oral
HIV infects which cells?
macrophage and T-lymphocytes
Antiviral reverse transcriptase inhibitors do what?
block transcription of viral DNA from RNA
AIDS patients most frequently die from what?
pneumonias
Who was the first scientist to crystallize viruses and prove they were inanimate particles?
Wendell Stanley
