40. Which of the following descriptions is false ? (A) When a solution of double-stranded DNA is heated at neutral pH, the absorption of ultraviolet (260 nm) light may increase. (B) Double-stranded regions of RNA can form between two self-complementary regions of the same single strand of RNA. (C) Lowering the ionic strength of a solution of double-stranded DNA will decrease the melting temperature of the DNA: (D) The Hoogsteen (non Watson-Crick) interaction, which can result in triple-helical DNA structures, are primarily hydrophobic interactions involving the bases. (E) In nucleotides and nucleic acids, syn and anti conformations relate to rotation around the sugar-base bond.