The precursors of 5S rRNA,the tRNAs,and a variety of other small nuclear and cytosolic RNAs are synthesized by ______.
(I)RNA polymerase I.
(II)RNA polymerase II.
(III)RNA polymerase III.
A)I or III
B)I or II
C)I only
D)II only
E)III only

Question

Quizplus · Accepted Answer

The precursors of 5S rRNA, tRNAs, and various other small nuclear and cytosolic RNAs are synthesized by RNA polymerase III. RNA polymerase I is responsible for the synthesis of larger ribosomal RNAs, while RNA polymerase II synthesizes messenger RNAs and some small nuclear RNAs. Therefore, the best choice is III only.

The Precursors of 5S RRNA,the TRNAs,and a Variety of Other