Viral Replication (AQA A-Level Biology): Flashcards
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Viral replication
Viral replication
Process by which viruses reproduce within host cells
Why do viruses hijack host machinery?
Why do viruses hijack host machinery?
Cannot replicate independently
Viral attachment protein function
Viral attachment protein function
Binds to complementary proteins on host cell membrane
Capsid
Capsid
Protein shell surrounding viral genetic material
RNA virus pathway
RNA virus pathway
RNA goes directly to ribosomes to produce viral proteins
DNA virus pathway
DNA virus pathway
DNA produces RNA, then RNA goes to ribosomes to produce viral proteins
Budding release method
Budding release method
Viruses coated with host membrane, cell initially intact
Rupturing release method
Rupturing release method
Viruses escape by rupturing cell membrane, destroys cell
Why viruses are non-living
Why viruses are non-living
Lack machinery for independent metabolism & reproduction
Viral host-specificity cause
Viral host-specificity cause
Attachment proteins must match compatible host cell receptors