You are attempting to synthesize rRNA in a test tube using DNA isolated from mouse cells. In addition to the template DNA, ribonucleotides, and the necessary transcription factors, you should also add ________ to the test tube. 

A. RNA polymerase III
B. poly-A polymerase
C. RNA polymerase II
D. RNA polymerase I


Answer: D

Biology & Microbiology

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