They provide evidence for Gilbert's RNA world hypothesis, and these molecules are capable of hydrolyzing their own phosphodiester bonds.
One example of these molecules regulates the production of GlmS based on glucosamine-6-phosphate presence in the cell. Another of these molecules has an activity-essential motif consisting of G5, G8, and G12, as well as a U-turn that gives it its namesake shape. Examples of these molecules capable of catalyzing in vivo Diels-Alder reactions were described by Seelig. Another type of them might allow for production of HIV-resistant T-cells. They provide evidence for Gilbert's RNA world hypothesis, and these molecules are capable of hydrolyzing their own phosphodiester bonds. For 10 points, give this term for RNA molecules with enzyme-like catalytic activity, such as the "Hammerhead" type.
One example of these molecules regulates the production of GlmS based on glucosamine-6-phosphate presence in the cell.
 ribozymes [prompt on RNA before mentioned]