Question

1. which of these will most likely happen if an enzyme is added to a certain chemical reaction? select two correct answers. the activation energy will be lowered. the rate of reaction may speed up or may slow down. the reaction will completely stop. the rate of reaction will start to increase. the rate of reaction will decrease.

Explanation:

Enzymes are biological catalysts. They lower the activation - energy required for a chemical reaction to occur and increase the rate of the reaction. They do not make the reaction stop or decrease its rate.

Answer:

The activation energy will be lowered.
The rate of reaction will start to increase.