BIOL 2051 Lecture Notes - Lecture 2: Mycoplasma, Hopanoids, Aquaporin
Document Summary
Chapter overview: morphology of bacterial cells, the cytoplasm, the bacterial cytoskeleton, the cell envelope, the bacterial cell surface, bacterial taxonomy. Morphology of bacterial cells: common bacterial shapes/morphologies: if it is italicized and capitalized it is a genus, if it is written regularly it is the shape a. i. Rod-shaped (s. bacillus, pl. bacilli)-most common a. ii. 1. a. iii. Comma-shaped (s. vibrio, pl. vibrios)(grouped w/spiral) a. iii. 2. a. a. iv. Pleiomorphic (varied shapes: size of bacteria can vary greatly. b. i. Usually smaller than eukaryal cells (bacteria are often. Small eukaryal cells are usually >5 m in diameter b. iii. b. iv. There are exceptions to the general size of bacterial cells. b. iv. 1. Thiomargarita namibiensis: up to 700 m in diameter! (means sulphur pearl ) b. iv. 1. a. Very big, can see with naked eye b. iv. 2. Epulopiscium fishelsoni: 200-700 m x 80 m! b. iv. 2. a. Very big (discovered in the gut of a sugeonfish) b. iv. 3. Some mycoplasma cells are only 0. 2 m in diameter. b. iv. 3. a.
