Class Notes 8/18
Class Notes 8/18 BSC 242
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This 3 page Class Notes was uploaded by Amanda DiSunno on Tuesday August 23, 2016. The Class Notes belongs to BSC 242 at University of Alabama - Tuscaloosa taught by Daryl W. Lam in Fall 2016. Since its upload, it has received 4 views.
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Date Created: 08/23/16
Microbiology & Man 08/18/2016 ▯ ▯ -Microorganisms are organisms that are too small to be seen with the unaided eye. Bacteria Viruses Protozoa Some Fungi(molds and yeasts) Some Algae Helminths (parasitic worms) ▯ ▯ Functions of Microorganisms (How do they help or hurt man) Decompose organic waste Are primary producers in the ecosystem (photosynthesis) Produce industrial chemicals such as ethanol and acetone Produce fermented foods such as vinegar, cheese, and bread Produce products used in manufacturing (ex cellulose) ad treatment (ex insulin) A few are pathogenic, disease-causing ▯ ▯ Knowledge of microorganisms Allows humans to: o Prevent food spoilage o Prevent disease occurrence o Led to aseptic techniques to prevent contamination in medicine and in microbiology laboratories. o ▯ Naming and Classification of Microorganisms Linnaeus established the system of scientific nomenclature. Each organism has two names: the genus and specific epithet. They are italicized or underlined. o Genus: Homo o Species: Homo sapiens ▯ ▯ Scientific Names Are italicized or underlined. The genus is capitalized and the specific epithet is lower case Are “Latinized” and used worldwide. May be descriptive or honor a scientist ▯ ▯ Staphylococcus aureus Describes the clustered arrangement of cells ▯ Exherichia coli Honors the discovered, theodor escherich, and describes the bacterium’s habitat After the first use of scientific names may be abbreviated with the first letter of he genus and the specific epithet Homo sapiens h.sapiens ▯ ▯ Bacteria: Prokaryotes (no nucleus) Peptidoglycan cell walls Binary fission For energy use organic chemicals, inorganic chemicals, or photosynthesis ▯ Archaea Prokaryotic Lack peptidoglycan Live in extreme environments Include: o Methanogens o Extreme halophiles o Extreme thermophiles ▯ Fungi: Eukaryotes (true nucleus) Chitin cell walls Use organic chemicals for energy Molds and mushrooms are multicellular consisting of masses of mycelia, which are composed of filaments called hyphae Yeasts are unicellular. ▯ Protozoa Flagella ▯ Algae: Mostly eukaryotes Cell walls Use photosynthesis for energy Produce molecular oxygen and organic compounds ▯ Viruses: Acellular Consist of DNA or RNA core Core is surrounded by a protein coat Coat may be enclosed in a lipid envelope Viruses are replicated only when the are in a living host cell. ▯ ▯ Multicellular Animal Parasites Eukaryote Multicellular animals Parasitic flatworms and round worms are called helminthes. Microscopic stages in life cycles ▯ ▯
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