MICB 202 Chapter Notes - Chapter 2: Lipoteichoic Acid, Glycosidic Bond, Cell Membrane
Document Summary
Genus + species name (underlined or italicised) Strain: a population of bacteria descended from a single organism in a clonal fashion. Serovar or serotype: a strain differentiated by immunological means can be identified by ab agglutination test, elisas, western blots. Definition of species for (cid:862)higher(cid:863) eukar(cid:455)otes: i(cid:374)ter(cid:271)reedi(cid:374)g group of diploid se(cid:454)uall(cid:455)-reproducing organisms that yield fertile offspring. Possess nucleoid (nuclear region) lack membrane around chromosomal dna. Dimensions of a typical bacteria: about 0. 5-(cid:1005) (cid:373) (cid:454) (cid:1005)-(cid:1005)(cid:1004) (cid:373) Dense suspension of ribosomes concentrated solution of protein (enzymes), mrna, trna, small molecules and inorganic ions. Nucleoid chromosome (dna component of the nucleoid) + proteins single circular chromosome. Periplasm: water-filled compartment with proteins (e. g. enzymes) between cytoplasmic membrane and pg layers. Gram -ve: stain red few layers of pg and outer membrane (om) Peptidoglycan: mechanical strength prevent osmotic lysis in hypotonic environment. Outer membrane: less fluid and less permeable to prevent harmful chemicals from entering.
