Final answer:
Nucleic acid is not a chemical class of neurotransmitters. Neurotransmitters are typically amino acids, biogenic amines, acetylcholine, and purines like ATP. Nucleic acids are involved in genetic information storage and transmission, not in neuronal communication.
Step-by-step explanation:
The answer to the question, "Which of the following is not a chemical class of neurotransmitters?" with options (a) biogenic amine, (b) nucleic acid, (c) amino acid, (d) ATP and other purines, (e) acetylcholine, is option (b) nucleic acid. Neurotransmitters can belong to various chemical classes, such as biogenic amines, amino acids, purines like ATP, and acetylcholine. Biogenic amines like serotonin, which are derived from amino acids, play a role in transmitting signals across neurological synapses. Amino acids like glutamate, GABA, and glycine serve directly as neurotransmitters. Acetylcholine is critical in the cholinergic system, particularly at the neuromuscular junction.
Nucleic acids, on the other hand, are not a class of neurotransmitters; they are the molecules responsible for storing and transmitting genetic information in cells, which include DNA and RNA. Therefore, nucleic acids do not fit in the category of neurotransmitter substances used for neuronal communication.