BIS 2C Lecture Notes - Lecture 9: Intracellular Parasite, Sexually Transmitted Infection, Quorum Sensing
30 Aug 2016
School
Department
Course
Professor
Document Summary
Bacteria have peptidoglycan as part of their cell walls. Gram+ and gram- show the two possible arrangements. Peptidoglycan is sensitive to staining agents, so sometimes antibiotics work by affecting the peptidoglycan layer and cell wall synthesis. Bacterial morphology is limited to three basic forms, but there is some variation within each type. Bacteria have considerable variation in size, the largest are just visible to the naked eye. Some bacteria feed singly as individuals, but congregate to form multicellular fruiting bodies. Multicellularity = division of labor, some cells give up reproduction. Some cyanobacteria are able to fix atmospheric n and are capable of photosynthesis using folded membranes. Movement in bacteria is variable: swimming: rotation of flagella, swimming: sheathed flagella, swarming: lateral flagella, social gliding: retraction of pilli, adventurous gliding . Many bacteria move using multiple flagella; the flagella of bccteria, and. Biofilms = composed of groups of bacteria that secrete an extracellular polymer that binds the cell together; slime.
