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?
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a) the aim of this activity is to prove that the liquid in test tube a was dissolved by saliva
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Answer:
Explanation:
a. To show the action of salivary amylase on starch.
b. Liquid A is starch.
c. The first test tube did not show any colour
change with iodine because starch was not present
anymore in it. It was already digested by salivary
amylase present in saliva. The colour of liquid in
the second one changed to blue black as the starch
was still unchanged due to absence of the enzyme.
d. Salivary amylase enzyme is responsible for such
a result
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