BIOL 1116 Study Guide - Quiz Guide: Spirillum, Gut Flora, Eyepiece

• School: Virginia Tech
• Department: Biological Sciences
• Course: BIOL 1116
• Professor: W Lee

Document Summary

Bacteria: kingdom bacteria: prokaryotic and unicellular, peptidoglycan cell walls, simple circular chromosome, unique porphology, very diverse group and very important, binary fission, includes autotrophs and heterotrophs. Archaebacteria: prokaryotic, single-celled, cell walls lack peptidoglycan, found widespread (even extreme areas, includes autotrophs and heterotrophs. Prokaryotic cell wall external to the prokaryotic plasma membrane. Eukarya: kingdoms fungi, protista, plantae, and animalia. Prevents the cell from bursting in a hypotonic environment. More than 10,000 species that are either aerobic or anaerobic (facultative without oxygen vs. obligate) Photoheterotrophs: use the sun as an energy source to break down external organic matter. Cgemoheterotrophs: use chemicals to break down external organic matter. Pathogenic forms (a wee bit of bacteria are pathegenic) can affect ecosystem health. Important function in biogeochemical cycling (nitrogen cycle) Bacteria identification metabolic testing: procuction of gas/acid tests whether bacteria produces certain enzymes. If the gelatin remains a liquid at cold temps. , hydrolysis has occurred (enzyme gelatinase hydrolyzes gelatin).