MICROBIO 101 Chapter Notes - Chapter 3: Irradiation, Doubling Time, Blood Gas Tension

• School: UW-Madison
• Department: Microbiology
• Course: MICROBIO 101
• Professor: M I C H E L L E R O N D O N

Document Summary

Microbial growth: increase in the population (number of cells, growth = replication. Binary fission cell division: usually in bacteria and archaea, two equal daughter cells formed. One generation when the population doubles due to binary fission of one cell to create two. Generation time (doubling time) time it takes for binary fission to occur. Septum dividing barrier that lays down the cell"s midpoint when it is ready to split. Growth = population growth: populations grow exponentially. What do microbes need in order to grow: energy, nutrients. Pressure radiation levels extremophiles organisms that thrive outside the normal environemental conditions (extreme envir are normal) How do we grow microbes in the lab: defined media exact chemical composition is known, complex media approximate composition is known but not the exact, prototrophs. Microbes that are adept at making all of the metabolites they need to build new cells and grow: some microbes need organic molecules that they can"t make themselves.