What is the primary function of enzymes in biological reactions?

The primary function of enzymes in biological reactions is to speed up reactions. Enzymes are biological catalysts that lower the activation energy required for a reaction to occur. This means that they enable substrates to convert into products more efficiently and at a faster rate than they would without the presence of the enzyme.

By facilitating these reactions, enzymes play a crucial role in various metabolic processes within living organisms, allowing for the timely and efficient execution of biochemical functions essential for life. Their specificity also ensures that specific reactions occur in the correct manner and at appropriate times, contributing to the overall regulation of cellular activities.

The other options do not accurately represent the primary function of enzymes; enzymes do not provide energy or transport substances directly, nor do they inhibit reactions as their main role. The ability of enzymes to speed up reactions is key to sustaining life's metabolic pathways.