Which structure is responsible for manufacturing ribosomes?

Which structure is responsible for manufacturing ribosomes?

• A. Nucleus
• B. Nucleolus
• C. Rough ER
• D. Golgi apparatus

Answer: (B)

The nucleolus is the specific structure within the cell that is responsible for the production of ribosomes. It is located within the nucleus and serves as the site for ribosomal RNA (rRNA) synthesis and the assembly of ribosomal subunits. These subunits are then transported out of the nucleolus into the cytoplasm, where they combine to form functional ribosomes that are essential for protein synthesis. The nucleus, while it contains the nucleolus and holds the cell's genetic material, does not directly manufacture ribosomes but instead houses the processes that are conducted by the nucleolus. The rough endoplasmic reticulum (Rough ER) is involved in protein synthesis and modification but does not play a role in the actual assembly or production of ribosomal components. The Golgi apparatus is primarily responsible for modification, sorting, and packaging proteins for secretion or delivery to different cellular destinations, not for ribosome production. Thus, the nucleolus uniquely fulfills the essential role of ribosome manufacturing.

The nucleolus is the specific structure within the cell that is responsible for the production of ribosomes. It is located within the nucleus and serves as the site for ribosomal RNA (rRNA) synthesis and the assembly of ribosomal subunits. These subunits are then transported out of the nucleolus into the cytoplasm, where they combine to form functional ribosomes that are essential for protein synthesis.

The nucleus, while it contains the nucleolus and holds the cell's genetic material, does not directly manufacture ribosomes but instead houses the processes that are conducted by the nucleolus. The rough endoplasmic reticulum (Rough ER) is involved in protein synthesis and modification but does not play a role in the actual assembly or production of ribosomal components. The Golgi apparatus is primarily responsible for modification, sorting, and packaging proteins for secretion or delivery to different cellular destinations, not for ribosome production. Thus, the nucleolus uniquely fulfills the essential role of ribosome manufacturing.