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

Explain about the importance of vitamins, Explain about the Importance of V...

Explain about the Importance of Vitamins? Vitamins are the organic substances that act as coenzyme and/or regulator of metabolic processes. There are 13 known vitamins, most of

Explain the tubal ligation, Explain the Tubal Ligation   This process i...

Explain the Tubal Ligation   This process is the most commonly utilized method of female sterilization. Tubal ligations are generally done in an outpatient surgical center. Thr

Biosecurity in poultry health management, B i osecurity in Poultry Health...

B i osecurity in Poultry Health Management Biosecurity includes all the measures that are taken to prevent infection to individual, material and environment from the pathogen

Plane of cleavage, PLANE OF CLEAVAGE - Each cleavage of the division...

PLANE OF CLEAVAGE - Each cleavage of the division zygote is marked by a cleavage furrow. Usually the first cleavage furrow is vertical & passes through the main axis of t

Importance value index (ivi) - synthetic characters, Importance Value Index...

Importance Value Index (IVI) - Synthetic Characters In any study of community, the quantitative value of each of the frequency density, and cover has its own importance. But t

How can we increase of total peripheral resistance, How can we increase of ...

How can we increase of total peripheral resistance?   A.  A decrease in the diameter of every arteriole.   B.  An increase of sympathetic discharge to all the smooth muscles

Pregnancy, What are the physiological changes during pregnancy

What are the physiological changes during pregnancy

Management of constipation, Q. Management of Constipation? You must hav...

Q. Management of Constipation? You must have realized by now that proper dietary and lifestyle management can help in maintaining the normal bowel movements to a great extent.

Briefly explain about archenteron and blastopore, Q. What are the archenter...

Q. What are the archenteron and the blastopore? What is the stage of the embryonic development in which these structures are formed? What are the destinations of the archenteron an

What information from the patients symptoms, A 16 year old boy named Jake w...

A 16 year old boy named Jake was admitted into the emergency room complaining of headache, fever, stiffness of abdominal muscles and difficulty swallowing. The doctor on staff bega

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