Final answer:
Yes, RNA can base-pair to produce secondary structures or regions of double-stranded structure.
Step-by-step explanation:
Yes, RNA can base-pair to produce secondary structures or regions of double-stranded structure. Even though RNA is single-stranded, most types of RNA can show extensive intramolecular base pairing between complementary sequences. This base pairing allows RNA molecules to form predictable three-dimensional structures that are essential for their function.