Lower temperatures reduce molecular kinetic energy, decreasing enzyme-substrate collisions and thus the reaction rate.
A decrease in temperature reduces the kinetic energy of molecules, slowing their movement and decreasing the frequency of effective collisions between enzyme and substrate, thus reducing the reaction rate.
| Front | A decrease in temperature decreases the kinetic energy of molecules in a solution. Explain how a decrease in temperature decreases the rate of an enzyme-controlled reaction. ( 2 marks) |
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| Back | molecules moving less/slower; reduces chance of collision (between enzyme and substrate)/of enzyme-substrate complexes being formed; |
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