A catalytic RNA molecule is called a __________.

### Why this is right A ribozyme is an RNA molecule that catalyzes a chemical reaction. Its existence shows that catalytic activity is not restricted to proteins. ### The concept Most enzymes are proteins, but RNA can also adopt structures that bind substrates and promote reactions. This catalytic RNA role is distinct from the usual information-carrying role of many RNA molecules. ### Terms - **Catalysis**: acceleration of a chemical reaction by a catalyst. - **Ribonucleic acid (RNA)**: a nucleic acid made with ribose sugar. ### Remember A ribozyme is RNA with catalytic activity.