CELL WALLComplex, semi-rigid structure that gives shape and protection to the cell.1. Functions► a. Prevents cell from rupturing due to entrance of too much water.b. Helps give shapec. Point of anchorage for flagellad. May contribute to ability to cause diseasee. Site of action for some antibioticsf. Chemical composition may be used in classification2. Composition and Characteristicsa. Eubacterial cell walls are mainly made of peptidoglycan, a substance found nowhere else in nature. It is in the form of one macromolecule that surrounds the entire cell. It consists of disaccharide units connected by polypeptides to form a lattice. 1) Gram-positive cell wallsa) These consist of many layers of peptidoglycan, forming a thick, rigid structure.b) Also included are teichoic acids, which consist of an alcohol and phosphate.
This is the end of the preview.
access the rest of the document.
cell walls, Harmful chemicals, f. Chemical composition