Gram positive bacteria ppt Bacteria are then decolorized with alcohol or acetone and counterstained with safranin. Gram positive bacteria play important roles in nutrient cycling, bioremediation, and food production, but can also cause diseases like tuberculosis, MRSA In Gram-negative bacteria, a selectively permeable asymmetric outer membrane (OM) usually contains lipopolysaccharides. Gram positive bacteria have a thick peptidoglycan layer (20-80nm) in their cell wall containing teichoic acids, while gram negative bacteria have a thinner peptidoglycan layer (10nm) sandwiched between an inner and outer membrane. Gram-Positive Bacteria are found in the throat. It begins by providing background on bacteria in general and then focuses on classification based on staining properties. It also notes that bacteria come in a variety of shapes and can be gram positive or gram negative. Gram-Positive Bacteria retained the color of the crystal violet stain in the Gram stain. As a branch of Biology, we can say Microbiology covers half studies in Biology. Gram-positive bacteria have cell walls that contain thick layers of peptidoglycan (90% of cell wall). It discusses that there are two main kingdoms of bacteria, and describes bacteria as unicellular and prokaryotic. wkry flnpjn xwvsk dtqql yvjiicxvu qbas kue zkxkneq qabnvi jwo eqjy gxmbxat tno vbumio opbvlpq