Generally speaking, enzymes (which amylase happens to be) do not undergo any permanent structural change while carrying out their function. Some do exhibit transient conformational change during a reaction, but upon completion regain their original form.
So your initial assumption is correct: once amylase has finished catalyzing the breakdown of starch into less complex sugar molecules, it moves on and repeats the process over and over.
Answer:
The shapes of continents fit together like a puzzle. The matching coastlines show where the continents broke apart. Identical rocks that formed over 200 million years ago have been found on different continents.
Explanation:
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