Where Within a Eukaryotic Cell is Ribosomal RNA (RRNA) Synthesized

Question

Where within a eukaryotic cell is ribosomal RNA (rRNA) synthesized?
A) cytoplasm
B) lysosome
C) mitochondrion
D) nucleolus

Accepted Answer

Ribosomal RNA (rRNA) is synthesized within the nucleolus, which is a sub-compartment within the nucleus of eukaryotic cells. The nucleolus is responsible for the synthesis and assembly of ribosomal subunits, which are subsequently exported to the cytoplasm where they combine to form functional ribosomes.