Question

Assertion: The main part of carbohydrate digestion takes place in the small intestine.
Reason: Here pancreatic amylase converts carbohydrates into lactose.

A. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
B. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
C. If the assertion is true but the reason is false
D. If both the assertion and reason are false
E. If the assertion is false, but reason is true

Answer 1

Hint: In the small intestine, Pancreatic amylase converts starch and dextrose into maltose and the small intestine is the main site for digestion of carbohydrates.

Complete answer:
For the carbohydrate digestion it takes place in the small intestine it is a primary site for carbohydrate digestion Pancreatic alpha-amylase is the primary carbohydrate digesting enzyme. Pancreatic amylase, converts the carbohydrates, such as glucose, maltose, maltotriose, and dextrin.
There is lactase, sucrose, maltase on the outside of the enterocyte. Enzymes, like that, that are on the outside of cell walls are referred to as ectoenzymes. Therefore, the correct option is (C) assertions are true but reason is not true.
In option (A) both assertion and reason only assertion are true reason are not true because pancreatic amylase converts starch and dextrin not carbohydrates into lactose.
In option (B) assertions are true but reason is not true because pancreatic amylase converts starch and dextrin’s not carbohydrates into lactose.
Option (D) assertions are true because the carbohydrate digestion takes place in the small intestine.
In option (E) assertions are not false, reason is false because pancreatic amylase converts starch and dextrin’s not carbohydrates into lactose.

Hence, the correct answer is option (C).

Additional information:
Three categories of amylases, denoted alpha, beta, and gamma, differ in the way they attack the bonds of the starch molecules seen in the membranes that cover the abdominal cavity and the outside of abdominal organs.

Note: The optimum pH of $\alpha$-amylase is 6.7–7.0. In the small intestine when food passage the starch molecules are catalyzed mainly to maltose by the pancreatic amylase. It occurs in the first section of the small intestine (duodenum).