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Explain Nucleus

What is

Explain it with details also diagram

Reply 1

Nitrotoluene

Original post

by What is

Explain it with details also diagram

To answer your question, I consulted my well-thumbed biology textbook, written by an expert in the field, and found that the information is still valid.I searched online for a diagram of a cell and found the one below.
The Nucleus: The Cell's Control Central
The nucleus is a membrane-enclosed control centre that holds the cell's DNA and directs cell activities.
What's in There?
-Nuclear Envelope: Double membrane with pores controlling molecular movement.
-Chromatin: DNA-protein mix in euchromatin (active, loosely packed) and heterochromatin (inactive, tightly packed).
-Nucleolus: Where rRNA is made and ribosomes begin assembly.
-Nucleoplasm: Jelly-like substance with ions, enzymes, and proteins for genes.
-Nuclear Lamina: Protein network supporting nucleus structure.
What Does It Do?
-Protects DNA in chromosomes.
-Regulates which genes are transcribed into RNA.
-Copies DNA before cell division
-Assembles ribosomes
-Manages cell growth and division.
-Makes and modifies mRNA.

Reply 2

lyric-ex-Preside

Original post

by What is

Explain it with details also diagram

Hey, how are you doing? so your question, 'what is a nucleus?' It's kind of interesting to learn about it. So I'll try to explain it the simple way as possible.
So I hope you have seen how the solar system is. With the sun in the middle and a lot of space around it and with some planets. So an Atom is just like a solar system. The center of an atom is called the Nucleus. And the Electrons revolve around the nucleus (just like planets revolve around the sun) in definite paths, but inside the atom. So when we consider the nucleus, it is composed of 2 main fundamental particles called Protons and Neutrons.(Now if you do A2 Physics, you might learn that Protons and neutrons and electrons are actually composed of Quarks and leptons etc. Unless you do that, you can think protons and neutrons are fundamental particles.) Protons are positively charged and neutrons don't have a charge. so the nucleus is basically positively charged. Now the electrons are negatively charge, which is the factor that makes it able to revolve around the nucleus without falling. Also in an atom, the nucleus has almost all the mass of the atom. So basically, nucleus is the dense core of an atom that contains protons and neutrons. So that's basically the idea about an nucleus. By the way as a matter of fact, I don't know how a nucleus is defined in Biology as I only did about matter for Chemistry and Physics AL. Hope you understand it. feel free to ask if you have any questions.

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