Which of the following may serve as a molecular clock that measures the approximate time since two related species diverged?
A) tRNA
B) mRNA
C) rRNA
D) sRNA
E) tmRNA

Question

Quizplus · Accepted Answer

rRNA (ribosomal RNA) evolves slowly and its sequence changes very little over time. Therefore, the differences in the rRNA sequence between two species can be used as a molecular clock to estimate the time since they diverged from a common ancestor.

Which of the Following May Serve as a Molecular Clock