A2.3 (part 1) Flashcards
viruses cells
dna or rna
capsid (protein shield) around genetic material
no cytoplams or lipid membrane
viruses cant be SEEN
not seen by light microscopy, seen by electron ones they are 20-50 namo meters
single stranded rna
hiv, influenza, corona
double stranded rna
rotaviruses
single stranded dna
parvovirus
double stranded dna
bacteirophage lambda. variola, herpes
hiv and flu have an
enveloped membrane which surrounds capsid membrane.
it is made of lipids and proteins andgets it from host cells when it releases
envelope help with
for protection
discuises from immune system
helps attatch and enter new cells
not envelope cells
more stable
resistant to enviromental changes
viruses have 1
protine and one type of nucleic acid, they cant reproduce alone
viruses are an extreme form of
obligate intracelular particlues/paracites
ways in which viruses rely on host cells
energy
nutrience
replication
transport
ways viruses get into cells
endosome
receptor mediated fusion
endosome
invasion from membrane, with membrane around and brwak inot cell
receptor mediated fusion
binds to receptor proteins on membrane and inject right into cell
