When the temperature drops below the optimum, the rate of an enzyme-controlled reaction falls. Several possible explanations for this slowing are given below. 1 The enzyme molecules become denatured. 2 The molecules have lower kinetic energy. 3 The shapes of the substrate molecules are altered. 4 Collisions between molecules occur less often. Which reasons lead to the reaction slowing down?
- A1 and 3
- B1 and 4
- C2 and 3
- D2 and 4