A ribozyme is best described as which of the following?

A ribozyme is best described as which of the following?

• A. DNA molecule enzyme
• B. RNA molecule enzyme
• C. Protein enzyme
• D. Lipid molecule enzyme

Answer: (B)

Ribozyme is an RNA molecule that acts as an enzyme. In biology, enzymes are substances that speed up chemical reactions, and while most are proteins, some RNA molecules can fold into shapes that provide an active site and catalyze reactions themselves. The name itself—RNA-based enzyme—highlights this: ribozyme = ribonucleic acid with catalytic activity. These RNA catalysts often require metal ions like Mg2+ to help stabilize charges and facilitate catalysis, and they participate in processes such as RNA splicing and processing, as well as self-cleavage in certain RNA motifs. Therefore, the best description is an RNA molecule that serves as an enzyme, rather than a DNA enzyme, a protein enzyme, or a lipid enzyme.

Ribozyme is an RNA molecule that acts as an enzyme. In biology, enzymes are substances that speed up chemical reactions, and while most are proteins, some RNA molecules can fold into shapes that provide an active site and catalyze reactions themselves. The name itself—RNA-based enzyme—highlights this: ribozyme = ribonucleic acid with catalytic activity. These RNA catalysts often require metal ions like Mg2+ to help stabilize charges and facilitate catalysis, and they participate in processes such as RNA splicing and processing, as well as self-cleavage in certain RNA motifs. Therefore, the best description is an RNA molecule that serves as an enzyme, rather than a DNA enzyme, a protein enzyme, or a lipid enzyme.