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