Question

Describe the structure of nucleus on basis of nuclear membrane, nuclear pore, nucleolus,chromatin material and nucleoplasm

Answer 1

Answer:

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Answer 2

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ANSWER:

The nucleus is a highly specialised cell organelle which controls all the activities in a cell. It is the brain of a cell. It is round or oval in outline and possesses four parts. They are:

• Nuclear Membrane

• Nucleoplasm

• Chromatin Reticulum

• Nucleolus

The Nuclear membrane is the outer delicate covering of the nucleus. It contains pores of different dimensions.

The Nucleoplasm is the protoplasmic substance of the nucleus. It is also known as nuclear sap.

Chromatin Reticulum is composed of a network with highly elongated chromatin threads which overlap one another and are embedded in the nucleoplasm.

The nucleolus is generally present in the nucleus of most of the cells. The nucleolus become enlarged during active period of cell division and are less developed in quiescent stage. It is often called as cell organizer.

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