Question

a bread piece tastes sweet while it is being swallowed. why

Answer 1

It is this chain of sugar molecules that we call starch. ... This is why the bread starts to taste sweet after lots of chewing - the amylase enzyme is breaking down the starch and turning it into glucose. Amylase isn't the only enzyme to break down food into molecules we can absorb.

THANKS!!! :)

Answer 2

bread contains starch capable of being broken down by ptyalin to glucose, so it will taste sweet.