PPT-BACTERIA

CLS 311 Basic Microbiology Mrs Amany Ahmed Niazy Bacteria are the smallest and most versatile independently living cells known Microorganisms Acellular Cellular Prokaryotes Eukaryotes. Monera. Learning Objectives. Name 3 types of bacterial cell. Explain reproduction of bacteria. Explain nutrition of bacteria. State the factors affecting growth of micro-organisms. Define the term pathogenic. Mrs. Stewart. Medical Interventions. Central Magnet School. 2 Classes of Bacteria. Gram (-) . Thin layer of . peptidoglycan. Lipopolysaccharides. (. endotoxins. ). Stain red. Gram (+). Thick layer of . Hopkins Microbiology Course 2010. Marcus . Schicklberger. Lactic Acid Bacteria. Gram positive. Non-. sporforming. Anaerobes, lack . catalase. Acid- and . halotolerant. Ferment glucose to only lactic acid or to lactic acid, CO. Protists. , Fungi. Chapter 7. Grade 7 Science. Viruses. _____ - a tiny, non-living particle invades and then multiplies inside of a living cell.. Viruses can only multiply when they are _____ of a living cell.. Christina . Machak. HMC 2012. Originally named “non-sulfur” because it was thought that they could not use sulfide as electron donor. Can tolerate small concentrations of sulfur, but much lower than green and purple sulfur bacteria. High Concentrations of H. Hopkins Microbiology Course. Ann . Lesnefsky. . . 7-15-2011. Metabolism of PNS Bacteria. Organic acid electron donor. Photosynthesis for energy generation. Bacterial chlorophyll b. BY: Selena & Nicole. Foundations of biotechnology . Biotechnology can be defined as the manipulation of living organisms or their components to provide products or to serve useful purpose. As result the DNA of plants, animals and other organisms can be manipulated in the laboratory .. Mackenzie Abate. 9. th. Grade. Problem/Rationale. Does saliva have an effect on bacteria?. If so, what is this effect?. Also, I have always heard people say “a dog’s mouth is cleaner than a human’s.” By testing the saliva’s effect on bacteria, I tested the cleanliness of the mouth. . Lunch and Learn. May 7, 2015. Deb . Kirchhof. -Glazier. The U.S. is #1 in the world for health care expenditure but…. We are 53 . out of all 228 nations/territories on the globe for . life . expectancy. Helpful Bacteria. Most bacteria are harmless to humans.. Many are useful:. Aid in digestion. Provide nutrients for plants by breaking down dead material by decomposition. Provide drugs and hormones. Provide some types of food.. Structure and Function. 2. Prokaryote & Eukaryote. Evolution. 3. Cellular Evolution. Current evidence indicates that . eukaryotes evolved from prokaryotes. between 1 and 1.5 billion years ago. Two theories:. CLS 212: Medical Microbiology. Miss . Zeina. . Alkudmani. Prokaryotes. Prokaryotic cells possess simpler structures than eukaryotic cells. . , since they . do not have a nucleus or other . cytoplasmic. Lack a nucleus. DNA is naked, a single loop not bound in a chromosome. May contain plasmids (small circular fragments of DNA). Have ribosomes, but no other organelles.. DNA present as a long circular molecule.. Simple, one-celled organisms. Multiply rapidly. Killed by antibiotics. Some have become antibiotic resistant. Classified by shape & arrangement. Shapes of Bacteria. Bacteria Classes. Cocci. =round or spherical.