Previously I have been discussed that cell protoplasm. Now I am discussing about the contorl centre of cell. Read this article to know about how nucleus control centre of cell, nucleus’s parts and function
Concept of Nucleus:
Nucleus is largest extra-cytoplasmic cell organelle. Human cells have nucleus that averages between 11-22 micrometers in diameter. Nucleus is present in all eukaryotic cells but in prokaryotic cell ‘true nucleus ‘is absent. Generally, there is one nucleus in each cell, but this number may vary in different types cells.
The nucleus shape and size varies with type and function of cell. It may be rounded, oval or disc shape. Nucleus was first discovered by “Robert Brown” from cell orchid plant. It is commonly the most prominent organelle in cell.
Structurally, nucleus is a spherical body which is bounded by two layers membrane such as outer membrane and inner membrane.nucleus is control centre of cell. nucleus controls all vital activities in a cell.
PARTS OF NUCLEUS:
The nucleus involves following parts such as
NUCLEAR MEMBRNE: Nuclear membrane is the outer envelope of nucleus. In prokaryotic nuclear membrane is always absent. Nuclear membrane allows a free ions exchange . It separate nucleus from the cytoplasm.
NUCLEOLUS: Inside the nucleus a dark colored mass is found called nucleolus. This organelle was found by bowman. It is a spherical, dense, colloidal and acidophilic body. The nucleolus size also varies depending upon its synthetic activity.
NUCLEOPLASM: The nucleus is filled with a transparent, semi-solid, granular substance known as nucleoplasm. Nucleoplasm is mainly made up of nucleic acids, proteins, enzymes, lipids and minerals.
FUNCTIONS OF NUCLEUS:
Nucleus is a membrane bounded structure that contains the cell’s hereditary characters which are transferred from parents to the offspring.
Nucleus acts as a store house of the genetic information.nucleus controls our cell structure hence, nucleus called control centre cell.
Nucleus takes part in fertilization during sexual reproduction. Nucleus directs proteins formation which can either directly control transcription.
Nucleus controls the transfer and replication of hereditary molecules. Nucleus is responsible for ribosome secretion. The energy process and nutrient metabolism in cell is regulated by nucleus.
Nucleus contains chromosomes consisting DNA that regulate cell growth and reproduction.
It also regulates protein synthesis in cytoplasm. The nucleus regulates molecules allowed through the pores of membrane to prevent some layers molecules entering from cytoplasm.
How nucleus control center of cell :
The word “nucleus” can refer to center of an atom or control center cell. Nucleus manages many cellular activities. It helps to protect DNA. Every action in cell takes is in some way influenced by DNA of nucleus. It always situated at center expect some exception.
Nucleus controls cell because it has the DNA. If the nucleus is removed from cell, then protoplasm eventually dries up. Hence it shows that nucleus take part in controllingprotoplasm. Cell without nucleus have limited growth and life span and also incapable for further cell divisions.
Nucleus is necessary to keep the cytoplasm functioning properly for indefinite period. A nucleus is responsible for determining and controlling what a cell looks like what does it. As brain control our body that’s like nucleus controls our cells. Nucleus regulates all other structures, hence called “control centre of the cell”.
How Nucleus Control center of cell-Concept, Parts & Function belongs to TechiBuzz
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