Are polysaccharides organic?
No, polysaccharides are a kind of sugars with much higher molecular mass and composed of monomers.The organic catalysts are catalysts that posses organic nature (They are carbon's compounds).The most common organic catalysts are the enzymes (which are proteins in fact) found in the living organisms.
It depends on what kind of cell you are talking about. Plant cells have cellulose in their walls that make them rigid. Bacteria have peptidoglycan. Archaea have a couple of possibilities: glycoproteins, pseudopeptidoglycan or polysaccharides. Fungi have chitin that make them pretty rigid. And, algae can have glycoproteins, polysaccharides or silicic acid.
As you stated, plastics are polymers, meaning they are made up of several smaller units called monomers. An example of this is a common material known as PVC. This stands for polyvinyl chloride, which is a polymer of vinyl chloride. Likewise, polysaccharides are also polymers, made up of smaller units, again called monomers. An example of this is a carbohydrate, which is made up of smaller sugars, such as glucose. So the difference between plastics…