Answer:
hope this helps you out good luck
Meat and other types of tough food
She was running harder than she usually does, so she worked up a sweat.
Her body needed to burn food more quickly to get energy to run hard.
Her body needed to use more heat energy
Substrate molecules would just bounce off and move along because each enzyme is like a key to the active site. so if the 'key' doesn't fit the 'lock' then nothing will happen<span />