They can also be wrapped or rolled around foods, stuffed like sandwiches, or eaten plain. Almost every culture with access to grain has devised some kind of bread that is flat, made from ingredients like wheat, teff, corn, rye, or rice. The most basic flatbread is made from ground grain and water.
Animal cells only have the cell membrane. The cell membrane is a semi-permeable covering surrounding the outside of the cell. Plant cell membranes are found on the outside of the cell cytoplasm and just inside the cell wall. So, the answer to the question, 'Do plant cells have a cell membrane?', is 'Yes!'.
Cell walls can be composed of polysaccharides, proteins, lipids, or a combination of these. Cell walls provide increased mechanical strength and resistance to lysis by osmotic shock (water moving into the cell). Cell walls are found in the cells of eubacteria, archaebacteria, fungi, algae, and plants. The cell walls vary greatly in their compositions: 1  Eubacteria. 2  Almost all eubacterial species have cell walls containing a polysaccharide called peptidoglycan.