Cell wall The primary cell wall of land plants is composed of the polysaccharides cellulose, hemicelluloses and pectin. Often, other polymers such as lignin, suberin or cutin are anchored to or embedded in plant cell walls. Algae possess cell walls made of glycoproteins and polysaccharides such as carrageenan and agar that are absent from land plants. In bacteria, the cell wall is composed of peptidoglycan. The cell walls of archaea have various compositions, and may be formed of glycoprotein S-layers, pseudopeptidoglycan, or polysaccharides. Fungi possess cell walls made of the N-acetylglucosamine polymer chitin. Unusually, diatoms have a cell wall composed of biogenic
Pharmacy school must study six years to become pharmacists. The best school of pharmacy is at Universidad de Chile , in Santiago de Chile. Chilean pharmacists are prepared not only to dispense and be able to work at clinical and communitary pharmacies, but in Pharmaceutical, Food and Cosmetic industry at every level, including drug development (a Degree is needed here), manufacturing, management, marketing, etc., due to the very strong scientific preparation they receive, including engineering and pharmaceutical technology topics. The official title for pharmacists in Chile is Químico Farmacéutico (Pharmaceutical Chemist), and their degree is Licenciado en Ciencias Químicas y farmacéuticas (Bachelor