Agar is a gelatinous substance that is usually extracted from algae. Agar is derived from polysaccharide agarose, which is a crucial supporting structure in the cell walls of the specific species of algae. Polysaccharide agarose is easily released from the algal cell walls on boiling. Agar is mainly extracted from the algae which are known as agarophytes which belongs to the Rhodophyta (red algae) phylum. In chemical terms agar is a polymer that is formed from the subunits ... Read more