Final answer:
The best term for an RNA molecule that possesses catalytic activity is ribozyme.
Step-by-step explanation:
The best term for an RNA molecule that possesses catalytic activity is ribozyme.
Ribozymes are ribonucleic acids that catalyze reactions similar to that of enzymes. They help in the processing of newly transcribed RNA and have the ability to self-catalyze their own replication.
Examples of ribozymes include small nuclear RNA (SnRNA) and heteronuclear RNA (hnRNA), as well as ribosomal RNA (rRNA) found in ribosomes.