Question

the function of an enzyme in a biochemical reaction is to
a raise the temperature of the system
b speed up the rate of the reaction
c increase the amount of substrate added
d change the type of product formed

Explanation:

Enzymes are biological catalysts. Catalysts lower the activation - energy of a reaction, which speeds up the rate of the reaction without being consumed in the process. They do not raise the temperature, increase substrate amount, or change product type.

Answer:

B. speed up the rate of the reaction