At what pH would you expect amylase, the enzyme found in saliva, to work best?

1 answer:

5 0

Amylase in saliva work best at neutral pH or pH 7. Many studies show that at this pH, the enzyme activity is the highest. When the enzyme reaches the stomach where it is an acidic environment amylase activity goes down or even stops. Then, as it enters the small intestine where the pH goes back to neutral level the amylase then resume to it's shape and works again.

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The Lewis bases are those which can donate electron pair to an acceptor. These electrons can be a pair of electron that is a lone pair, a negative charge or electrons in a $\pi$ -bond.

In $H-C\equiv C-H$ , the presence of $\pi$ -bond make it a Lewis base.
In $H^{-}$ , the presence of negative charge makes it a Lewis base.
In $NH_3$ , the presence of lone pair on nitrogen makes it a Lewis base.
In $CH_3CH_2CH_3$ , there is no lone pair, no $\pi$ -bond, no negative charge so it is not a Lewis base.