Which part of the cell is primarily responsible for ribosome assembly?

The part of the cell that is primarily responsible for ribosome assembly is the nucleolus. The nucleolus is a dense region within the nucleus where ribosomal RNA (rRNA) is synthesized and combined with proteins to form the subunits of ribosomes. Once these subunits are assembled, they are then transported out to the cytoplasm, where they combine to form functional ribosomes that play a crucial role in protein synthesis.

Ribosomes are essential for translating messenger RNA (mRNA) into proteins, and the nucleolus acts as the site where the initial and critical steps of ribosome production occur. This process is vital for cellular function, as ribosomes are required for the synthesis of all proteins needed for the cell’s life and processes.