ribosomal RNA (rRNA) synthesis

Ribosomal RNA (rRNA) synthesis occurs mainly in the nucleolus of a cell’s nucleus. It begins with the transcription of ribosomal DNA (rDNA) by RNA polymerase I, which produces a large precursor rRNA molecule. This precursor is then processed and modified to form the mature rRNA components that will become part of ribosomes, the cell’s protein factories. The entire process is tightly regulated to ensure the correct production of rRNA, enabling the assembly of functional ribosomes that are essential for translating genetic instructions into proteins necessary for cell function.