Viruses (Edexcel GCSE Biology Combined Science): Flashcards
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Practise the cards
10 cards from this deck
Why do viruses need host cells?
Why do viruses need host cells?
Cannot reproduce independently
Two main viral lifecycle pathways
Two main viral lifecycle pathways
Lytic pathway and lysogenic pathway
Main structure of viruses
Main structure of viruses
Protein coat around genetic material
Classification of viruses (living/non-living)
Classification of viruses (living/non-living)
Non-living pathogens
What is lysis in lytic pathway?
What is lysis in lytic pathway?
Host cell bursting, releasing new viruses
Norovirus lytic cycle duration
Norovirus lytic cycle duration
12 hours
Viral DNA location in lysogenic pathway
Viral DNA location in lysogenic pathway
Integrates into host cell's DNA
State of virus in lysogenic pathway
State of virus in lysogenic pathway
Dormant - doesn't produce new viruses immediately
Triggers for lysogenic to lytic switch
Triggers for lysogenic to lytic switch
Stress or environmental changes
Typical pathway used by phages
Typical pathway used by phages
Lysogenic pathway