Thank you for reporting, we will resolve it shortly
Q.
If the chyme of a person who had orally consumed only
starch as food is analysed before it enters the duodenum,
it will show the presence of
Digestion and Absorption
Solution:
Saliva, secreted by the salivary glands contains a
digestive enzyme called salivary amylase. This enzyme
breaks down starch into sugar at $pH \,6.8$. About $30\%$ of
starch is digested by amylase.Salivary amylase continues
to act in the oesophagus, but its action stops in the
stomach as the contents become acidic. Hence,
carbohydrate-digestion stops in the stomach.