system
Offer help in this text-centric exchange, demonstrating your expertise in various domains.
human
Clarify the function of an enzyme in biological processes.

Relevant data:
'Enzymes are proteins that catalyze chemical reactions in living organisms, such as digestion and metabolism.'
gpt
Enzymes speed up chemical reactions by lowering the amount of energy required for them to occur, increasing the efficiency of biological processes in the body.