how can you show that saliva breaks down starch into sugar explain in short
Answers
Answer:
Saliva contains an enzyme called as Amylase which breaks down the amylose in starch into amylopectin. Amylase causes hydrolysis reaction and breaks down the starch particles into smaller particles, leading to the final production of simple carbohydrates like maltose, maltotriose, and dextrins.
Experiment to show the effect of saliva on starch:-
1. 2 test tubes labeled A and B are taken, where tube A contains 1 tsp of boiled rice and tube B has 1 tsp of rice which has been chewed for 3-5 mins.
2. 4 ml water is added to both the test tubes and then 2-3 drops of iodine solution is also added to each test tube.
The color in the tube A changes to bluish-black color, whereas the color in the tube B remains unchanged.
This is because the rice in the tube B has been chewed and the saliva has acted on it and broken down the starch molecules into smaller sugar particles. But, the starch in the tube A was not chewed so the starch molecules are intact in it. The starch reacts with the iodine to give a bluish-black color. This indicates the action of saliva on starch.
Answer:
Saliva contains the enzyme amylase, also called ptyalin, which is capable of breaking down starch into simpler sugars such as maltose and dextrin that can be further broken down in the small intestine.
The digestive functions of saliva include moistening food, and helping to create a food bolus, so it can be swallowed easily. Saliva contains the enzyme amylase that breaks some starches down into maltose and dextrin. Thus, digestion of food occurs within the mouth, even before food reaches the stomach.
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