NATS 1670 QUIZ 4

NATS 1670 QUIZ 4 WHEN WAS SMALLPOX TRANS FROM EUROPE TO AMERICAS - 1519 A.D WHAT IS THE MOST COMMON CAUSE OF ACUTE INFECTION IN HUMANS? - VIRUS WHAT IS A VIRUS OUTSIDE THE CELLS CALLED? - VIRION WHAT ARE 2 PHASES FOR VIRUS AS AN ORGANISM - 1) OUTSIDE THE CELLS 2) AND THE VIRUS INSIDE THE INFECTED CELL ARE VIRUS CELLULAR ORGANIM? - NO Why is severe viral disease bad for the host and th virus - the goal of the virus is to, live and replicate within an organism, but if the organism dies then they die aswell why are ebola virus generally limited to africa - the host does not live long enough to spred the infection what 3 ways CANT you get ebola - 1) not airorne 2) Not through water 3) Not through food DO viruses have DNA and RNA? - No can virus make protein? - no Can virus make energy - no do virus repodroduce by division - no what range of length are viruses in - nano meter what range of length are cells in - micro meter What is the lysogenic cycle? - The lysogenic cycle is a viral replication cycle that does not kill the host immediately. what is the 4 steps to lysogenic replication? - 1) Viral genome enters host cells 2) Viral genome interegates into host-cells genome 3) Host-cell DNA polymerase copies chromosmes 4) Cell divides virus is transmitted to daughter cells What is the lyctic replication cycel - VIral particles are made and released from the cell 5 steps in the lytic replication cycle - 1) Viral genome entrs host cells 2) Ciral genome is replicated and transcribed 3)Viral mRNA are translated, and prtoteins processed 4)Particle assemble inside host 5)Particles exit to exterior What is a capsid? - protein coat surrounding a virus What is a lipid envelope? - a layer of membrane outside the protein