Observe that your saliva contains an enzyme

Observe that your saliva contains an enzyme:






you can reveal the presence of an enzyme, a catalytic protein, in one of your own body fluids, in this case, your saliva.

Put a piece of rusk in your mouth, do not swallow it, but turn it over with your tongue several times to soak up saliva. after a while ( about a minute), you will begin to perceive a sweet taste that was not there in the beginning. this is because your saliva contains an enzyme that breaks the bonds of starch into the rusk and releases a sweet disaccharide, maltose. You have just demonstrated that the hydrolysis ( digestion) of starch actually starts in the mouth, well before the food reaches your stomach.

To prove that the starch has been degraded by an enzyme and not by an enzyme and not by the aqueous component of your saliva wet another piece of rusk for as long as the first rusk, then put it in your mouth. not that it is not a sweet taste.

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