BIOL 2051 : Control Of Microbial Growth Study Guide (Exam 4)
Document Summary
Against ssdna viruses: no and no, how can viruses avoid host defenses, glucosylation: disguising with sugar, methylation, encode proteins to inhibit host restriction systems, describe rna interference. What hypothesis did he disprove: inventor of pasteurization, disproved spontaneous generation hypothesis, is pasteurization the same as sterilization, no, because not all microbes are killed, list the 4 methods of physical sterilization. Laminar flow hood: x-rays (10-10): causes breaks in the dna strands, breaks h bonds and disulfide bridges in proteins. Widely used for sterilization in the medical and food industries: gamma rays (10-12): causes breaks in the dna strands, breaks h bonds and disulfide bridges in proteins. Traps in the filter particles from liquids and the air. (ex. Hepa filters, vacuum cleaner, uv hood, clean rooms and isolation rooms for quarantine: membrane: thin sheets (0. 2 micrometer pores needed to filter out major pathogens). Total cell count remains constant while viable cell count decreases: bacteriolytic (penicillin): kills cells by lysis.
