Which Statement About a Pseudoknot Motif Is Not True

Multiple Choice

Which statement about a pseudoknot motif is not true?

A) Pseudoknot motifs have only been characterized in plant RNA viruses.
B) A highly conserved pseudoknot is required for telomerase activity.
C) Coaxial stacking of base-paired stems forms a quasicontinuous double helix.
D) A single-stranded loop base pairs with a complementary sequence outside this loop.