Intro to Viruses Flashcards
The most abundant life form in the human body:
Bacteriophages
Viruses can cause ___, ____, and ____ diseases
acute, persistent, recurrent
Viruses that are a large part of our genetic material
endogenous retroviruses
The largest of all viruses:
Mimivirus
Viruses replicate by ____ assembly of performed components
de novo
Viruses are obligate ____ parasites
intracellular
What are the five viruses around in the ancient times ?
Smallpox Polio Rabies Measles Yellow Fever
The first virus directly studied/isolated = ?
tobacco mosaic
What virus doesn’t infect humans?
tobacco mosaic
naked, helical
Virus that has helical shape (like a spiral staircase) and is a naked virus too = ?
tobacco mosaic
Naked viruses have a capsid but no…?
envelope
What are two major families that are naked viruses?
Adeno- and Picorno- viruses
Most naked viruses emerge from cells by:
cell lysis
Most viruses that affect the gut are ___ viruses
naked
Naked viruses are resistant to what five things?
heat, detergents, drying, pH, and proteases
Enveloped viruses emerge from cell via:
budding
Enveloped viruses have what that extend from the envelope?
Glycoproteins
Glycoproteins are also called:
envelope proteins (envelope glycoproteins)
Enveloped viruses are resistant to what four things?
heat, drying, detergents, bleach
Human helical viruses all have ___ genomes
RNA
Complex capsids are seen in:
pox viruses
Do complex viruses have an envelope?
Yes
Icos = __ faces, __ vertices
20 faces 12 vertices (which make up pentons)
*Made up of pentons and hexons
Virus that causes strep throat, gastroenteritis, pneumonia
Adenovirus
Viruses undergo ____ _____ (they don’t need assistance of cell)
self-assembly
Bacteriophage has a ___ body and a ___ head.
helical body
Icosahedral head
