BIO SCI 94 Chapter Notes - Chapter 36: Lysogenic Cycle, Prokaryote, Rna-Dependent Rna Polymerase

• School: UC-Irvine
• Department: Biological Sciences
• Course: BIO SCI 94
• Professor: Robin Bush

Document Summary

Virus - obligate (completely dependent on host cells) intracellular parasite. Are not cells/made up of cells, so not considered an organism. Can"t manufacture own atp or amino acids/nucleotides and proteins. Viruses enter a host cell, take over its biosynthetic machinery, and use that machinery to manufacture a new generation of viruses. Not alive because dependent on host cell to satisfy 5 attributes of life. Viruses can promote lateral gene transfer - shuttle cellular genes from one organism to another. Viruses contribute own genetic material to organisms (~5-8% of human genomes consists of remnants of viral genomes from past infections) Epidemic - disease that rapidly affects a large number of individuals over a widening area. Viruses caused most devastating epidemics in human history. Pandemic - epidemic that is worldwide in scope. Virulent - tend to cause severe disease. Aids - affliction caused by human immunodeficiency virus (hiv)