Which of the following do phylogenetic comparisons of secondary structures of rRNAs from a variety of species reveal?
A)strikingly similar structures and a high degree of similarity in the nucleotide sequences of the rRNAs themselves
B)strikingly similar structures and a low degree of similarity in the nucleotide sequences of the rRNAs themselves
C)dissimilar structures and a high degree of similarity in the nucleotide sequences of the rRNAs themselves
D)dissimilar structures and a low degree of similarity in the nucleotide sequences of the rRNAs themselves

Question

Quizplus · Accepted Answer

Phylogenetic comparisons of secondary structures of rRNAs from various species reveal strikingly similar structures despite a low degree of similarity in the nucleotide sequences of the rRNAs themselves. This suggests that the secondary structure of rRNA is critical for its function and has been conserved through evolution, even as the specific nucleotide sequences have diverged.

Which of the Following Do Phylogenetic Comparisons of Secondary Structures