Biod 171 Microbiology Mod 1 latest summary | verified

Module 1.1 Introduction Microbiology = the study of biological processes at the micro level The study of microbes Microorganisms – usually consist of a single cell Too small to study with just your eyes Ex. Bacteria, archaeon, fungi, protozoa, algae NOT viruses  microbes Microbes Aid in food digestion Protect us when we are exposed to potentially harmful foreign invader Help crops grow BUT Harmful strains kill millions of people each year Module 1.2 Classification of Cells Prokaryotic Lack nucleus Eukaryotic Have nucleus = membrane enclosed region that contains genetic material Classifications of life 1. Bacteria = prokaryotic Constitute a large cohort of prokaryotic microorganisms Common in human daily life Morphologies (shapes) Coccus = round Bacillus = rod Vibrio = curved rod Spirillum = spiral Cells may appear isolated, in chains or in clusters Some have motility = ability to swim Ex. Streptococcus – round E. Coli – rod Mycobacterium tuberculosis – unicellular bacterium 2. Archaea = prokaryotic Can survive in extremely harsh environmental conditions Extremophile