Question

1) Describe one way that the multiplication of animal viruses differs from bacterial viruses (1 point Animal virusts are mostly inside the envelope whee Bacterice often are found outside the envelope 2) Explain why many scientists believe that viruses have influenced the evolution of life on this planet (1 point). 3) Where are RNA-based viruses typically synthesized and assembled (1 point) Step 4 Synthesis

Answer 1

oE bolo Ita) viral Reblication is the term. used indicate formation of broke viruses during infection Proce in target host cells. Reblication between viruses is varied and depends on type of genes involved most DNA viruse assemble in nucleus most RNA Niruses develop solely in cytoplasm es in life cycle of viruses differe. greatly between species but there are six basic stages in life cycle of viruses - Lattachement penetration uncoating Biosynthesis it chronic infection release ibupat Difference between ibacterial wiruses animal viruses and are it in Stage - Attachement in ald Animal viruses Attach at Plasma membrane protein and bio glicoproteins og attach Bacterial i ruses Boltahes :- to Tail cell wall fibres a Proteins Ibres

Penetration Animal viruses in Capsid enters by endocytosis or fusson Bacterial viruse : o into injece viral DNA host cell .. injected STAGE - UNCOATING Animal viruses in of Enzymatic removal capsid proteins not required Bacterial wiruses - STAGE :- BIOSYNTHESIS Animal viruses - IN nucleus (DNA viruses] or cytoplaym (RNA viruses Bacterial viruses :- In exto plasm 6. STAGE CHRONIC INFECTION Animal viruses - Latency (slow viral infection) I Bacterial viruses - Lysogeny 16 STAGE - RELEASE Animal viruses : Enveloped visus bud out non enveloped viruses supture Plasma membrane Host cell lysed Bacterial risuses -

a viruses hirack nearly every function of a host organism's a in order to to rent replicate and spread , co it makes sense that they noon drive the evolution of cellular machinery to a great extent than other revolutionary pressures soon as Predation, or environ mental conditions for when we have a pandemic or an epidemic at some point in evolution the population that is targeted by virus either adapts. Or goes extinct .. T o The way viruses reproduce in host cells makes them particularly susceptible to genetic changes that help to drive their evolution. beltere that so si scientists niruses have influenced evolution of life 13. viruses their RNA replicate genome e veing virally encoded RNA debendent RNA polymerase RNA genome is template for synthests of additional strands - most Lot of the the RNA based viruses rotybically synthesized and one assembled do in ! cytoplasm.