Signaling molecules are divided into categories based upon their chemical structure. Which of the following is NOT a chemical structure category for signaling molecules?

Question

Quizplus · Accepted Answer

Pyrimidines are not a chemical structure category for signaling molecules. Instead, they are nitrogenous bases found in nucleic acids, not a category of signaling molecules. Signaling molecules are categorized based on their structure, such as amines, peptides, gases, and retinoids, but not pyrimidines.

Signaling Molecules Are Divided into Categories Based Upon Their Chemical