MCB 2610 Chapter Notes - Chapter 2: Atp-Binding Cassette Transporter, Ftsz, Signal Peptide
Document Summary
Shape of cell determined by organization of cell wall. Environmental conditions and stresses can cause change in bacterial morphology. Pleiomorphic: bacteria who don"t exhibit regular shapes but rather highly variable: ex- mycoplasma who don"t have cell wall and don"t have a regular shape. Hyphae: more complex multicellular arrangements of irregular branching filaments: mycelia: three dimensional networks of hyphae the rise above the substrate, penetrate down into the soil or broth. Trichomes: distinctive multicellular arrangement found in cyanobacteria, smooth unbranched chains, may have polysaccharide sheath coating the filament. In trichomes and hyphae the partitions between cells contain channels for intercellular passage of materials such as nutrients and signaling molecules. Bacterial size ranges from . 5um to 5 um. Cytoplasm: aq environment within plasma membrane containing diverse array of components- dna nucleoid, chromosome packaging proteins, enzymes involved in synthesis of dna/rna, regulatory factors, ribosomes, plasmids, enzymes involved in breaking down substrates, inclusion bodies, gas vesicles, magnetosomes, cytoskeleton structures.