Nucleoli contain many tandem repeat copies of which genes, transcribed by RNA polymerase I?
A)mRNA
B)tRNA
C)rRNA
D)siRNA
E)all of the above

Question

Quizplus · Accepted Answer

Nucleoli contain many tandem repeat copies of ribosomal RNA genes (rRNA), which are transcribed by RNA polymerase I. Therefore, option C is the correct answer. The other options, mRNA, tRNA, and siRNA, are not transcribed by RNA polymerase I and are not present in the nucleolus in high copy numbers.

Nucleoli Contain Many Tandem Repeat Copies of Which Genes, Transcribed