Question

Parwati collected his saliva and mixed it with liquid A in the test tube. In another test tube he took only liquid A. After 10 minutes, she added a few drops of iodine solution in the mixture in the first test tube. It did not show any colour but when she treated the other test tube with iodine, a blue black colour appeared. Now answer–
a) What is the aim of this activity?
b) What is liquid A?
c) Why did the first test tube not shown any colour change with iodine while the second one did?
d) Which enzyme is responsible for such a result?

Answer 1

a. To show that digestion of carbohydrates begin in mouth and the enzyme responsible is present in saliva
c.The first one did not show colour change as glucose who turns into blue black is already been treated by the enzyme present in saliva
d. Salivary amylase

Answer 2

Answer:

A) aim of activity is to test the presence of salivary amylase.

B) liquid A is starch.

C) First test tube had saliva added in it, which contained salivary amylase. The enzyme broke starch into its constituent units, and hence iodine could not react with starch.

Thus blue colour complex could not form, which showed up in second test tube, due to presence of starch.

D) Enzyme salivary amylase released from salivary glands in mouth, is responsible for such result.

Brainliest pls