Answer
In plants starch is the major storage carbohydra composed of two polysaccharides namely amylose and amylopectin. Amylose is a straight chain polymer of D glucose units and constitutes about 20 % of starch. Amylopectin is a branched chain polymer of D-glucose units and constitutes about 80 % of starch. However, there is a difference between them when it comes to long term storage. Most of the enzymes attack glucose polymer chains at their non-reducing end releasing one glucose unit at a time. This prevents the chain from getting broken down within chain. Amylopectin has many non-reducing ends, allowing rapid mobilization of glucose when needed. On the other hand amylose has single non reducing end and is us used mainly for long term storage of glucose/ polysaccharide.
Work Step by Step
In plants starch is the major storage carbohydra composed of two polysaccharides namely amylose and amylopectin. Amylose is a straight chain polymer of D glucose units and constitutes about 20 % of starch. Amylopectin is a branched chain polymer of D-glucose units and constitutes about 80 % of starch. However, there is a difference between them when it comes to long term storage. Most of the enzymes attack glucose polymer chains at their non-reducing end releasing one glucose unit at a time. This prevents the chain from getting broken down within chain. Amylopectin has many non-reducing ends, allowing rapid mobilization of glucose when needed. On the other hand amylose has single non reducing end and is us used mainly for long term storage of glucose/ polysaccharide.
