A biologist wants to increase the rate of a chemical reaction has a limited amount of time he continues to increase its substrate concentration instead. eventually reaction rate levels off he can't get it to go any faster what prevented the rate for increasing further

Respuesta :

Enzymes work the best in certain pH conditions and ranges in regards to base and acidic.  If the enzyme is no longer in that range, it could denature(change shape), which would lead to the chemical reaction not working.  I hope this is right or helped!