Structural Diagram of Nucleus Labelled with Different Parts

A nucleus is a double membrane-enclosed organelle within a cell that basically contains chromosomes or the genetic materials and other instructions required for cellular processing. The nucleus also contains the cell's hereditary information that controls the cell's growth and reproduction.

The nucleus is also known as a storage compartment for DNA. A single cell generally contains a single nucleus. But in some cases, the nucleus divides. But the cytoplasm never divides.

The main functions of the nucleus are to control the genetic characteristics and information of the cell, control enzyme and protein synthesis, control the cell growth or division of the cell, and store the DNA, RNA, and Ribosome.

Here, in this article, we are going to see the nucleus diagram, its structure, and its different parts. This diagram of nucleus will help you understand how the nucleus looks like and the location of its every part. This diagram will be very helpful for class 6, 9, 11, and 12, or any biology students as they can easily understand and draw it.

As you show in the above diagram, the nucleus has the following parts,

1. Endoplasmic Reticulum
2. Nucleolus
3. Karyosome(Endosome or Plasmosome)
4. Heterochromatin
5. Chromatin Threads
6. Chromocenter
7. Nucleoplasm
8. Inner Nuclear Membrane
9. Outer Nuclear Membrane
10. Perinuclear Space
11. Nuclear Pore

The membrane surrounding the nucleus covers and protects the stored DNA from chemical and physical damage. The outer membrane is in contact with the cytoplasm whereas the inner membrane connects to the nuclear lamina. Nuclear pores create passages through the nuclear membrane and so there is a clear path created for the movement of the products of the cell nucleus to enter the cytoplasm or endoplasmic reticulum. The pores also help to enter some specific macromolecules and chemicals from the cytoplasm to pass back into the cell nucleus.

The nucleus is usually a spherical or oval-shaped structure located near the center of the cell. It is separated from the rest of the cell by a double-layered nuclear envelope and it consists of an inner and an outer membrane. The nuclear envelope has nuclear pores that allow the passage of molecules between the nucleus and the cytoplasm.

The nucleus contains chromosomes, which are long strands of DNA wrapped around proteins called histones. The DNA carries the hereditary information that determines an organism's traits. In humans, each cell typically contains 46 chromosomes (23 pairs).

Within the nucleus, DNA is transcribed into RNA (ribonucleic acid) through a process called transcription. Transcription involves the synthesis of messenger RNA (mRNA), which carries the genetic information from the nucleus to the cytoplasm, where it is used as a template for protein synthesis.

The nucleus is involved in the production of ribosomes, which are cellular structures responsible for protein synthesis. The nucleolus, a region within the nucleus, is responsible for the assembly of ribosomal subunits. These subunits are then exported to the cytoplasm, where they combine to form functional ribosomes.

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