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