Question

Digestion of starch takes place in
A. Stomach and duodenum
B. Buccal cavity and small intestine
C. Buccal cavity and oesophagus
D. Duodenum only

Answer 1

Hint:- Starch also refers to amylum, it is a polymeric carbohydrate that is composed of multiple numbers of glucose units, and glucose units are combined with each other by glycosidic bonds. Starch is synthesized by the plants, in plants it is stored as a preserve food or energy.

Complete step-by-step solution:-
Our digestive system is composed of several parts, including the mouth (buccal cavity), oesophagus, stomach, and intestine. The digestion of food is always begun by mouth especially carbohydrates, the salivary glands secrete an enzyme called amylase, this enzyme starts the hydrolysis of starch in the mouth, and the tiny particle of food is mixed with saliva and transfer to the stomach through the oesophagus. In the stomach, food is treated by hydrochloric acid, gastric juice, and some enzyme after this treatment it moves toward to the small intestine, in the small intestine, another analyze enzyme secretes that further breakdown food particles into tiny particles or unit of food, means in the small intestine starch is completely break down or hydrolyzed into glucose unite. From the small intestine, these tiny particles are absorbed by the membranes of the small intestine and supply it throughout the body, and unabsorbed food move to the large intestine, this intestine absorbs all the water and the rest of the material is referred to as waste material that releases from the body through the anus.
Answer- Hence, the answer of this question is option B, buccal cavity and small intestine.

Note:- The most abundant carbohydrate is cellulose that is present in the cell wall of higher plants, bacteria, and algae. Animal body does not have the capability to digest this carbohydrate. D- glucose is the monomer unit of cellulose.