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SAI International School
Cl-X Subject- Biology
Chapter- Life Processes
Subtopicc- Nutrition in Human Beings I
S u b t o p i
Module-3
Home Assignmennt III (Activity)
H o m e A s s i g n m e
Activity---(6.3) NCERT
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Aim: - To show action of saliva on starch..
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Materials Required:
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Two test tubes, 1 ml saliva, 1 ml freshly prepared starch solution, dilute iodine
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How to proceed:
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1. First take 1 ml starch solution in two test tubes A and B..
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2. Add 1 ml saliva to test tube A.
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3. Then leave the test tubes undisturbed for 20 to 30 minutes.s.
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4. Add dilute iodine solution to both of the test tubes..
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5. Observe the colour change..
Starch without saliva turns blue with iodine..
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