BIO153H5 Study Guide - Midterm Guide: Martinus Beijerinck, Lytic Cycle, Lipid Bilayer
Document Summary
Coined the term virus tabacco mosaic virus: viruses are truly microscopic ex. Lytic replication: can be achieved by all viruses. Enter genome into host cell, replicate by using cells machinery, particles assemble and destroy cell as the replicated virus particles exit: lysogenic replication: only certain viruses, these infect bacteria. Integrate viral genome into host-cell genome, host-cell dna polymerase copies chromosome and as the cell divides, the virus is transmitted to daughter cells. Goes on until the virus is triggered, upon which it finishes the lytic cycle. Human immunodefficiency virus: doesn"t distribute equally throughout world, with the highest concentration being in sub- Saharan africa and smallest in australia/new zealand/pacific islands: each virus contains two copies of rna and 50 molecules of reverse transcriptase. Compared to e. coli: 1 every billion. Hepatitis c: major health issue, affecting 4 million people in usa (most do not know, the virus takes over liver rna molecules.
