Q:

What is the nucleolus made up of?

A:

Quick Answer

The nucleolus is made of deoxyribonucleic acid, ribonucleic acid and protein. It is a substructure of the eukaryotic nucleus, responsible for the production of ribosomes. The nucleolus is composed of two distinct parts known as the fibrillar component and the granular component.

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Full Answer

The fibrillar component contains RNA polymerase I, which is needed for the transcription of rRNA genes. The granular component exports ribosomal subunits to the cytoplasm. There is evidence to suggest that the nucleolus is involved in other cellular processes, such as the assembly and modification of ribonucleoproteins. It may also control cellular senescence, which is the biological aging of an organism.

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Related Questions

  • Q:

    What happens in the nucleolus?

    A:

    The nucleolus is chiefly responsible for creating ribosomes, which in turn function as factories for protein synthesis. The nucleolus contains three main organizing regions where transcription and processing of rRNA occurs. It also purportedly aids in other processes, like the packaging of signal recognition particles and the alteration of transfer RNA. The nucleolus is located in the nucleus, and thus only exists in eukaryotic cells.

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  • Q:

    What is the function of a nucleolus?

    A:

    The function of the nucleolus is to transcribe DNA into ribosomal RNA and assemble rRNA into ribosomal subunits. The creation of rRNA is important because rRNA makes up ribosomes which are responsible for protein synthesis in the cell.

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  • Q:

    What is inside the nucleus?

    A:

    The cell nucleus of a eukaryote contains a nucleolus, chromatin, ribosomes, nucleoplasm and pores. However, the nuclear envelope surrounds the nucleus and consists of an inner and outer membrane with pores. These pores are present to regulate the flow of materials like messenger RNA and protein moving through the membrane.

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  • Q:

    What is a dense area in a cell that contains nucleic acids?

    A:

    The dense area within a cell that contains nucleic acids is known as the nucleolus. The nucleolus is responsible for assembling ribosomes, which are essential to protein production and organization in a cell.

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