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 is a nucleolus?

    A:

    A nucleolus is a substructure composed of nucleic acids and proteins that is found within the nucleus of a cell. Known as the ribosome production factory, malfunction of the nucleolus has been found to cause disease in humans.

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  • Q:

    Where are ribosomes made?

    A:

    According to Florida State University, ribosomes are primarily constructed in the nucleolus of all living cells. Inside the nucleolus, four strands ribosomal RNA (rRNA) bind together with ribosomal proteins. This results in two structures, called the small ribosome subunit and the large ribosome subunit. Both of these subunits travel through pores in the nucleus and enter the free space of 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 the physical description of the nucleolus?

    A:

    The nucleolus is found in the nucleus of a cell and appears as a dark spherical region when seen through a microscope. The nucleolus is one of the largest physical structures within the nucleus and can occupy up to a quarter of its total volume.

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