What type of replication does influenza use?
The replication of the influenza genome involves two steps: transcription of complimentary RNA (cRNA), followed by transcription of new vRNA copies using the cRNAs as templates.
How do helical viruses replicate?
Helical nucleocapsids (which, among vertebrate viruses, enclose only RNA genomes) form as viral proteins bind to nascent RNA transcripts and encapsidate them. During virus assembly, helical nucleocapsids migrate to cellular membranes where viral glycoproteins have concentrated.
How do Dsdna viruses replicate?
Most double-stranded DNA viruses replicate within the host cell nucleus, including polyomaviruses, adenoviruses, and herpesviruses—poxviruses, however, replicate in the cytoplasm. Adenoviruses and herpes viruses encode their own replication factors.
Is influenza lysogenic or lytic?
(1) The cell may lyse or be destroyed. This is usually called a lytic infection and this type of infection is seen with influenza and polio.
What is Uncoating in viral replication?
Uncoating: The viral capsid is removed and degraded by viral enzymes or host enzymes releasing the viral genomic nucleic acid. 4. Replication: After the viral genome has been uncoated, transcription or translation of the viral genome is initiated.
What is a helical virus?
Helical viruses consist of nucleic acid surrounded by a hollow protein cylinder or capsid and possessing a helical structure. Polyhedral viruses consist of nucleic acid surrounded by a polyhedral (many-sided) shell or capsid, usually in the form of an icosahedron.
What is ssDNA and dsDNA?
They can be divided between those that have two strands of DNA in their genome, called double-stranded DNA (dsDNA) viruses, and those that have one strand of DNA in their genome, called single-stranded DNA (ssDNA) viruses. Additionally, many DNA viruses are unassigned to higher taxa.
How does a virus replicate itself?
Viruses cannot replicate on their own, but rather depend on their host cell’s protein synthesis pathways to reproduce. This typically occurs by the virus inserting its genetic material in host cells, co-opting the proteins to create viral replicates, until the cell bursts from the high volume of new viral particles.