Memory Microbiology chapter 3Versión en línea Cell structure por misael Lopez •Structural support •Transport of molecules •Receptors for hormones •Surface antigens Cytoskeleton Helps maintain the shape of a cell externally and protects it from physical or chemical damage. A rigid layer of polysaccharides lying outside the plasma membrane of the cells of plants, fungi, and bacteria. - a fluid mosaic made up of three types of organic molecules. - a semipermeable membrane surrounding the cytoplasm of a cell - Thin peptidoglycan layer in the periplasmic space - large periplasmic space A dense gelatinous matrix composed of 70% to 80% water. the site for most of the enzymatic reactions and metabolic activity of the cell. Plasma Proteins - identifies bacteria as either gram stain positive or negative Cytoplasm Very dynamic and capable of reorganization. Helps cells maintain their shape Gram negative Cell wall Cell membrane Gram positive Bacterial cell wall - thick peptidoglycan layer, external to plasma membrane.
Crear