Question

List the chemical changes undergone by a molecule of starch from the time it is placed in the mouth to its ultimate use in providing energy

Answer 1

starch is 30% digested in mouth by ptyalin..
in oesophagus nd stomach there in no digestion of starch...
starch dig. completes in small intestine by amylopsin in pancreatic juice and maltase..lactase etc in intestinal juice nd is finally converted to glucose ..galactose etc..

hope this helps u..

Answer 2

• starch is digested in mouth only
• There is no digestion of starch
• It's digestion complete in small intestine by amylopsin in pancreatic juice
• And finally convert it into glucose

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