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biology
cells, virus and reproduction
viruses
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Created by
abdul ahmed
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Cards (16)
viruses are
non living.
viruses are classified based on their
nucleic acid
type
types of viruses
DNA
RNA
RNA
Retrovirus
examples of RNA Retrovirus
HIV
examples of RNA viruses
tobacco mosaic
ebola
examples of
DNA
viruses
-lambda phage
Lambda Phage
complex structure
DNA
nucleic acid
host cells are
bacteria
and
e-coli
Tobacco mosaic virus
helix shape
have
+ssRNA
which can be directly translated to proteins
host cells are
tobacco
plants
HIV
virus
icosahedral
shape
have
single
strand RNA
reverse transcriptase
used to produced cDNA
host cells are
white blood
cells
Ebola
virus
envelope
helix shape
have
-ssRNA
which needs to be transcribed to
mRNA
before being translated
host cells
are
humans
lytic
cycle
virulent
virus DNA injected into host cell cytoplasm
viral
protein
made
genetic
info/DNA replicated
virions
assemble
cells
LYSE
lysogen
pathway
non
virulent virus injected into
host cell cytoplasm
as a
provirus
virus produces
repressor
proteins
(
stops
transcription)
latent
virus enters
lytic
cycle (when host cycle is
weak
)
How do antivirals work?
inhibit
replication by...
forgetting viral
enzyme
so cant
replicate
DNA
forgetting viral
antigen
to prevent
entry
to
host
What is the focus of disease control?
SPREAD
OF
INFECTION
summary of ebola outbreak
poor hygiene
caused virus to spread
4900 deaths
no
vaccine
so focus was on
reducing spread
methods of control of virus
quarantine
sterilisation
of
equipment
rapid testing
of people