What is starch , Biology

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Starch exists in plants as insoluble starch granules in chloroplasts.  Each starch granule   holds   a   combination   of   two   polysaccharide    forms, amylopectin and amylose.  The Amylose is an unbranched polymer of glucose residues joined in α1-4 linkages.  An Amylopectin   is  the  branched   form;  most  of  the  constituent glucose  residues  are connected  in α1-4  linkages  but additional  α1-6  bonds  happen every 25-30 residues, establishing the branchpoints.

 


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