BLG 151 Study Guide - Quiz Guide: Myer, Gram-Negative Bacteria, Acne Vulgaris
30 Nov 2016
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Document Summary
Microbiology is the study of microbes (organisms and acellular entities too small to be clearly seen by the unaided eye) Size ranges from a few nanometers to about 200micrometers. Normally relatively simple in structure, frequently single celled (or if more, lacking specialization of cells) Domain bacteria: usually single celled, the majority have a cell wall with a peptidoglycan, most lack a membrane bound nucleus, ubiquitous (everywhere) including extreme environment. Cyanobacteria produce significant amount of oxygen (more than plants) Domain archaea: distinguished from bacteria by unique rrna gene sequences (found in ribosomes- which creates proteins, lack peptidoglycan in cell walls, have unique membrane lipids, some have unusual metabolic characteristics, many live in extreme environments. Domain eukarya- eukaryotic: protists generally larger than bacteria and archaea. Protozoa may be motile hunters and grazers (paramecium) Slime molds two life cycle stages. Water molds devastaing disease in plants: fungi. Smallest of all microbes composed of genetic material (dna, rna) and protein.
