We now believe that a __________ must have existed very early in the evolution of all cells because something had to copy the information from the ancient "RNA world" cell into the DNA of modern genomes.

Question

Quizplus · Accepted Answer

Reverse transcriptase is the enzyme responsible for copying RNA into DNA, which is essential for the transition from the RNA world to the DNA world. Therefore, it is likely that a reverse transcriptase existed early in the evolution of all cells.

We Now Believe That a __________ Must Have Existed Very