Starch!!!

Starch is a polysaccharides consisting of a large number of glucose units joined together by glycosidic bonds. Starch is produced by all green plants as an energy store and is a major food source for humans.

Pure starch is a white, tasteless and odorless powder that is insoluble in cold water or alcohol. It consists of two types of molecules: the linear and helical amylose and the branched amylopectin.

As starch composed by large number of glucose units joined together by glycosidic bonds, it is a huge structure which cannot soluble in water. To break it down, amylases can be used to break starch into starch into the simple sugars, glucose, which is soluble in water.