In Eukaryotic Organisms, the Processing of the 45S RRNA into 5.8S

Question

In eukaryotic organisms, the processing of the 45S rRNA into 5.8S, 18S, and 28S rRNA occurs where?
A) In the cytoplasm
B) In the nucleolus
C) In the endoplasmic reticulum
D) In the Golgi body
E) Throughout the cell

Accepted Answer

The processing of the 45S rRNA into 5.8S, 18S, and 28S rRNA occurs in the nucleolus, which is a specialized subunit within the nucleus of eukaryotic cells that is responsible for ribosome biogenesis. The nucleolus contains the machinery and enzymes required for ribosome assembly and maturation, including those involved in the processing of rRNA precursors.