Question

Explain nucleus with the help of a labelled diagram

Answer 1

Answer:

A nucleus is the brain of the cell.

• A nucleus is a covered with double layered membrane called as nuclear membrane.
• The has certain pores called as nuclear pores which help in the exchange of materials from inside of the nucleus to the cytoplasm.
• The nucleus includes chromosomes and nucleolus.
• The chromosomes contain information for the inheritance.
• When the cell is about to divide, the chromatin material gets organised into chromosomes.
• Nucleoplasm is the liquid in which nucleolus and chromatin material are present.
• It has the central role in cellular reproduction.
• It also helps in directing chemical activities of the cell.
• It determines how a cell will develop.

Answer 2

Answer:

◾Nucleus was first discovered by Robert Hooke.

◾Nucleus is the controlling centre of the cell.

◾All the metabolic activities and chemical reactions occurring in the cell are controlled by the nucleus.

◾Nucleus contains the inheritance material such as DNA (Deoxyribonucleic Acid) and genes for heredity.

◾The nucleus is bounded by nuclear Membrane which is connected to the endoplasmic reticulum.

◾Inside the nucleus there is 'nucleolus'.

◾And, nucleoplasm is the jelly like substance present inside the nucleus,which contains chromosomes for heredity information.

◾It has small pores present known as nuclear pores that helps in exchange of material in and out of the nucleus.