What is nucleus where it is found, Biology

Assignment Help:

What is nucleus where it is found?

Nucleus :  The nucleus is present only in eukaryotic cells. It is the control center and is generally found in the center of the cell.
The nucleus is the site of synthesis of the molecules responsible for transmission of genetic information - DNA, or deoxyribose nucleic acid, and RNA, ribonucleic acid. A double membrane called the nuclear envelope surrounds it.

744_nucleue.png

Outside the nuclear envelope is a gel-like substance called the cytoplasm, which fills most of the cell. The cytoplasm contains organelles and various types of filaments that serve to hold the shape of the cell and become involved in cell division, locomotion, and adhesion. RNA and other substances move from the nucleus to the cytoplasm through complex holes in the nuclear membrane called nuclear pores.

The counterpart of the cytoplasm inside the nucleus is the nucleoplasm, which contains fine strands of chromatin, a combination of DNA and proteins. During cell division, chromatin coils up and forms chromosomes.

Most nuclei also contain one or more spherical or egg-shaped structures called nucleoli (singular - nucleolus). The function of a nucleolus is to synthesize and partially assemble ribosomes, structures that serve in the assembly of proteins. The ribosomes then migrate to the cytoplasm where proteins are formed.


Related Discussions:- What is nucleus where it is found

Determine the applications of biotin, Applications of Biotin Biotin is...

Applications of Biotin Biotin is mainly used in the preparation of injection, and also in the manufacture of vitamin B complex and multi-vitamin preparations. It is used in

Male reproductive disorders-testicular hypoplasia, Testicular Hypoplasia ...

Testicular Hypoplasia Hypoplasia refers to testicular disorders related to congenitally underdeveloped and underactive spermatic epithelium of one or both testes even though t

Cloning, there are a restriction map of a plasmid and a human gene of known...

there are a restriction map of a plasmid and a human gene of known sequence. Your task is to clone the human liver cDNA for this gene so that the start codon is closer to the EcoRI

Porifera, how to write character of porifera

how to write character of porifera

Function of promoter in transcription, Problem 1: How many different ty...

Problem 1: How many different types of RNAs are present? What is the function of Promoter in Transcription? Mention different types of RNAs Discuss function of Promot

Blood Vessels Assignment, If baroreceptors are primed to detect blood press...

If baroreceptors are primed to detect blood pressure changes and compensate for them, how is it that some patients suffer from chronic hypertension?

Median sternotomy approach-types of surgery, Median Sternotomy Approach :  ...

Median Sternotomy Approach :  The preferred approach these days is through a median sternotomy. Pericardiectoiny proceeds in the same way as done through left thoracotomy, by

Describe circulatory system, Circulatory system:  One of the eleven major b...

Circulatory system:  One of the eleven major body organ systems in animals; carbon dioxide, nutrients, transports oxygen, and waste products between the cells and the respiratory s

Cell with a euploid number of chromosomes, A cell with a euploid number of ...

A cell with a euploid number of chromosomes contains: A.one half of a complete set of chromosomes B.several complete sets of chromosomes C.the correct number of chromosomes D.two c

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd