Which of the following statements correctly describes the function of the nucleolus?


a. Within the nucleolus we find genes for rRNA.
b. Nucleoli manufacture mitochondrial proteins for export to the cytosol.
c. Nucleoli assemble the nuclear envelope.
d. The nucleolus contains the genes that form the Golgi apparatus.

Verified step by step guidance

1. Identify the primary function of the nucleolus in a cell.
2. Recall that the nucleolus is a region within the nucleus.
3. Understand that the nucleolus is primarily involved in the synthesis and assembly of ribosomal RNA (rRNA).
4. Consider that the nucleolus contains genes for rRNA, which are transcribed to produce rRNA molecules.
5. Evaluate the options given and determine which statement aligns with the known function of the nucleolus.

Key Concepts

Nucleolus Function

The nucleolus is a specialized structure within the nucleus of eukaryotic cells primarily responsible for the synthesis and assembly of ribosomal RNA (rRNA) and ribosomal subunits. It plays a crucial role in the production of ribosomes, which are essential for protein synthesis in the cell.

Ribosomal RNA (rRNA)

Ribosomal RNA (rRNA) is a type of RNA that, along with proteins, makes up the ribosomes. It is synthesized in the nucleolus and is vital for the translation of messenger RNA (mRNA) into proteins, serving as a structural and functional component of ribosomes.

Nuclear Envelope

The nuclear envelope is a double membrane that encloses the nucleus, separating its contents from the cytoplasm. While the nucleolus is involved in ribosome production, it does not assemble the nuclear envelope, which is formed by the fusion of the inner and outer membranes of the nucleus.