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The Nucleus is an essential organelle of a cell that acts as a blueprint for how the cells present in the body function. It is responsible for regulating all forms of cellular activities.
Let us get acquainted with the essential information concerning the Nucleus, starting with its definition.
The Nucleus is the most integral component of a cell. It is derived from a Latin word that means “Kernel of a nut.”
It is defined as a double membrane eukaryotic cell organelle, which contains genetic material.
The Nucleus is the most evident organelle in a cell that is entirely bound by the membranes. It is the largest organelle that is present in the human body occupying almost 25 percent of the cell volume.
The structure of a nucleus is divided into four main parts. This includes:
The Nucleus is bound by a double membrane layer which forms the envelope or the capsule. This envelope’s two layers stay separated from each other by a space often known as the perinuclear space. It generally separates the nucleus’ inner contents from the rest of the cell.
The nuclear envelope’s outer layer is rough due to the ribosome’s presence on its surface. Also, the nuclear membrane has tiny gaps known as the pores that allow the substances’ selective package between the cytoplasm and Nucleus.
Key points of Nuclear envelope
The DNA is prearranged in the Nucleus to form chromatin. The chromatin contains the proteins and condenses further to generate the chromosomes. A human cell has a total of 23 pairs of chromosomes.
Key Points of Chromatin
It’s a well-defined spherical structure that is present within the Nucleus. It is basically the site for the ribosomes’ synthesis and assembly. Here the ribosomes act as protein synthesis sites within the cell.
Key Points of Nucleolus
The nucleoplasm is also known as karyoplasm or nuclear sap. It is a granular, semi-solid substance that comprises several proteins.
The protein fibers generate a crisscross matrix within the Nucleus that helps maintain the structure and the shape of the Nucleus. It is basically the main site for the enzyme activity within the Nucleus.
However, the nucleoplasm appearance may vary during the various phases of a cell cycle.
Along with the proteins, the nucleoplasm also comprises other substances, including RNA, DNA and nucleus.
Key Points of Nucleoplasm
Functions of the Nucleus
The Nucleus performs several essential functions in a cell. The three primary functions of the Nucleus include
A nucleus is a double membrane organelle consisting of the genetic material and other instructions needed for the cellular process. The Nucleus has two primary functions, including
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