Question

Q1) state two important function of the nucleus ?

Q2) describe the various components of the nucleus present in eukaryotic cells ?

Answer 1

The nucleus is studied as a highly specialized organelle that serves as the information processing and administrative center of the cell. This organelle has two major functions: these are;
1. To regulate the goings-on inside the cell, like if proteins should be made and how much.
2. Storage site of DNA.
This is a simplistic explanation. To explain how all of this is done would require an advanced knowledge of cell biology and a lot of writing.




NUCLEUS:

nucleus was discovered by a scientist Robert Brown in 1831.it is spherical or oval in shape and is located in the centre in a young cell while in a mature cell it comes to lie on one side.


COMPONENTS OF NUCLEUS :

nuclear membrane :

the nucleus is surrounded by a thin , transparent membrane known as nuclear membrane. it separate the cytoplasm from the nucleus. the nuclear membrane has numerous large pores which help in direct communication between cytoplasm and the nucleoplasm.


nucleoplasm or karyolymph :

in the nucleus there is a sense but clear mass of protoplasm called nuclear sap or nucleoplasm. it contains enzymes and other complex substances which take part in the formation of DNA and THE.


chromatin network:

in the nucleoplasm a network of fine loosely connected threads is present called chromatin . the chromatin is the heredity material. in division of nucleus the chromatin forms a definite number of thread like structures called chromosome which contain heredity units in their surface,called gene. chemically chromatin consist of DNA and RNA.


nucleolus:

in each nucleus one or more globular bodies are present called nucleolus. they consist of protein and RNA. the nucleolus produces ribosomes which take part in protein synthesis. .