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In an experiment to investigate an aspect of digestion, two test tubes A and B were set up as shown in the diagram below. a) What...

      

In an experiment to investigate an aspect of digestion, two test tubes A and B were set up as shown in the diagram below.
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The test tubes were left in the bath for 30 minutes. The contents of each test tube was then tested for starch using iodine solution.
a) What was the aim of the experiment?
b) What results were expected in test tube A and B.
c) Account for the results you have given in (b) above in test tube A and B.
d) Why was the set up left at 37°C?

  

Answers


sharon
a) To investigate the effect of saliva on starch;
b) A - brown colour / colour of iodine persists;
B - Blue black ;
c) A - Starch has been digested / starch has been broken down / amylase hydrolyses starch to maltose hence starch absent; (no colour change)
B - Enzyme / salivary amylase denatured ;
d) Optimum temperature for enzyme amylase activity;
sharon kalunda answered the question on May 23, 2019 at 13:18


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