Name: Introduction to Tissues
Uploaded: 2019-07-19
Duration: 4 min 9 s
Description: Tissue is a group of cells similar in structure and function. In this video, we have talked about plant and animal tissues with the help of an example.

Question

Describe the nucleus of a cell.

Accepted Answer

The nucleus is a membrane-bound organelle found in eukaryotic cells that contains the cell's genetic material. It is often referred to as the "control centre" of the cell because it regulates the cell's activities and controls the expression of genes.

The nucleus is typically spherical or oval-shaped and is surrounded by a double membrane called the nuclear membrane or nuclear envelope, which separates the contents of the nucleus from the rest of the cell. The nuclear envelope is perforated by small pores called nuclear pores, which allow the exchange of molecules between the nucleus and the cytoplasm. The nucleoplasm is the semi-liquid substance within the nucleus of a cell. It fills the space between the nuclear envelope and the chromatin, and consists of water, ions, enzymes, and other proteins.

Within the nucleus, there is a dense region called the nucleolus, which is involved in the synthesis and assembly of ribosomes, the cellular structures responsible for protein synthesis. The nucleolus is not surrounded by a membrane and is composed of RNA, DNA, and protein.

The genetic material of the cell, in the form of chromosomes, is located within the nucleus. Chromosomes are long, coiled-up strands of DNA that contain the instructions for the development, function, and reproduction of the cell. The DNA is organised into discrete units called genes, which encode specific proteins that are essential for the cell's function.

Describe the nucleus of a cell.

Important Questions on Cell : Structure and Functions

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