Bacterial structures

lailay's version from 2015-09-27 03:49


Question Answer
Function of: PeptidoglycanGives rigid support, protects against osmotic pressure.
Function of: Cell wall/cell membrane (gram positives) Major surface antigen.
Function of: Outer membrane (gram negatives)Site of endotoxin (lipopolysaccharide [LPS]); major surface antigen.
Function of: Plasma membraneSite of oxidative and transport enzymes.
Function of: RibosomeProtein synthesis.
Function of: PeriplasmSpace between the cytoplasmic membrane and outer membrane in gram-negative bacteria.
Function of: CapsuleProtects against phagocytosis.
Function of: Pilus/fimbria Mediate adherence of bacteria to cell surface; sex pilus forms attachment between 2 bacteria during conjugation.
Function of: FlagellumMotility.
Function of: SporeResistant to dehydration, heat, and chemicals.
Function of: PlasmidContains a variety of genes for antibiotic resistance, enzymes, and toxins.
Function of: GlycocalyxMediates adherence to surfaces, especially foreign surfaces (e.g., indwelling catheters).
Chem composition of: PeptidoglycanSugar backbone with peptide side chains cross- linked by transpeptidase.
Chem composition of: Cell wall/cell membrane (gram positives)Peptidoglycan for support. Lipoteichoic acid induces TNF and IL-1.
Chem composition of: Outer membrane (gram negatives)Lipid A induces TNF and IL-1; O polysaccharide is the antigen.
Chem composition of: Plasma membranePhospholipid bilayer.
Chem composition of: Ribosome50S and 30S subunits.
Chem composition of: PeriplasmContains many hydrolytic enzymes, including β-lactamases.
Chem composition of: CapsulePolysaccharide (except Bacillus anthracis, which contains D-glutamate).
Chem composition of: Pilus/fimbriaGlycoprotein.
Chem composition of: FlagellumProtein.
Chem composition of: SporeKeratin-like coat; dipicolinic acid; peptidoglycan.
Chem composition of: PlasmidDNA.
Chem composition of:GlycocalyxPolysaccharide.