Grade 11Physical Chemistry
What is the basic structural difference between starch and cellulose?
1 Answer
Anjali Ahuja
The basic differences between them are here –>
- Cellulose is mostly linear chains of glucose molecules linked together by beta 1,4 glycosidic bonds whereas starch is found in both linear and branched chains.
- Cellulose has beta 1,4 linkage between the glucose units while starch has alpha 1,4 linkages
- Cellulose occurs in nature as pure cellulose , hemicellulose or lignin. Starch occur in two forms- amylase and amylopectin. Amylose is simple linear form where as amylopectin is complex and branched. Glycogen is the storage form of starch in animals and more branched than amylopectin.
- Cellulose is a structural polysaccharide. Starch is mainly a storage polysaccharide.
- Starch can be broken down to maltose and then finally to glucose by the enzymes present in humans. Cellulose cannot be digested properly in the absence of the cellulase enzymes.
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