Single-stranded RNA can bind to double-stranded DNA via Hoogsteen base pairing to form triplex structures, a mechanism supported by literature on non-canonical nucleic acid interactions and DNA-RNA triplex predictions.
The retrieved papers, particularly references [7] and [9], directly state that single-stranded nucleic acid or RNA molecules interact via Hoogsteen bonds with DNA double helices to form triplex structures (DNA-RNA triple helices). Therefore, the claim is supported by the literature.