Question

Explain the structure of nucleus.​

Answer 1

Answer:

Nucleus controls all cell activities ; contains genetic material

Explanation:

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Answer 2

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Nucleus is the control centre of the cell. It is covered by a double layered envelope called nuclear membrane. The nuclear membrane has pores which allow the transfer of material from inside the nucleus to cytoplasm. Inside the nuclear membrane an entangled mass of thread-like structure is present. This is called chromatin material (see picture↑).

The chromatin material is mainly formed of DNA(deoxyribonucleic acid) and proteins.

When a cell starts to divide, chromatin material condenses into rod-shaped structures called chromosomes. The chromosomes contains stretches of DNA which are called genes.

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