Question

what is the primary function of enzymes in biological systems?
to provide energy for cellular processes
to increase the rate of reactions without being changed themselves
to transport oxygen in the blood
to store genetic information

Explanation:

Enzymes are biological catalysts. They speed - up chemical reactions in the body by lowering the activation energy, and they remain unchanged after the reaction. They do not provide energy, transport oxygen, or store genetic information.

Answer:

To increase the rate of reactions without being changed themselves