General Characteristics, Parts of Viron, & Infectious Cycle Flashcards
smallest infectious agent : measures 20-300 in dm
virus
all virus are haploid except
retrovirus
virus has either _ and _ in nature
DNA and RNA
virus are resistant to _
antibiotics
virus are _ organisms – unable to self-replicate, requires host
cell
obligate intracellular
If the virus is envelope, it is ether _ or _
sensitive or labile
If the virus is naked, it is ether _
resistant
Naked virus
PPCRPA
PaPa Call Reo to Pick Adeno
Papovirus
Parvovirus
Calcivirus
Reovirus
Picornavirus
Adenovirus
protein shell or coat that encloses the nucleic acid (viral genome)
capsid
part of virion: DNA or RNA (never both)
Nucleic acid
Nucleic acid + capsid
nucleocapsid
morphological units seen on the surface of particles
capsomeres
capsomeres can be
helical and icosahedral
lipid containing membrane that surrounds some viral particles
envelope
envelope examples
Glycoprotein, matrix protein
smallest functional units equivalent to
building units of the capsid
protomers (structural unit)
finding suitable host cell to invade
Attachment/Adhesion/Invasion/Adsorption
engulfment of virus through endocytosis; if naked virus, through direct fusion
penetration
penetration of enveloped virus
endocytosis
penetration of naked virus
direct fusion
release of viral content, separation of capsule to genetic material
uncoating
replication/translation occur
biosynthesis
maturation, materials are assembled to protein coat —> forming of new cell
assembly
to the extracellular fluid and repeat the cycle thru budding and cell lysis
release
attaches to a specific receptor —> suitable host
viral tropism
