The organic compounds that serve as helper molecules in many chemical reactions are called enzymes.

Here's why:

* Enzymes are biological catalysts: They speed up chemical reactions without being consumed in the process.

* They are specific: Each enzyme typically catalyzes only one or a few specific reactions.

* They are essential for life: Enzymes are involved in a wide range of biological processes, including digestion, respiration, and DNA replication.

Let me know if you have any other questions about enzymes or other biological molecules!