Nucleus

Topic Description

The Nucleus is a membrane bound organelle that contains the cell’s DNA. This is where all the genetic information is held that helps to regulate cell functions by containing the codes on how to build cellular proteins. A nucleus is one of the major defining structures of all Eukaryotic cells. The nuclear membrane, sometimes called the nuclear envelope, is a double membrane that separates the contents of the nucleus from the rest of the cell. This is important because it needs to specifically to protect the DNA from both physical and chemical damage. Although it is a barrier, there is exchange of certain materials between the nucleoplasm, the fluid inside of the nucleus, with the cytoplasm, the fluid in the rest of the cell. There are many small holes, called nuclear pores, in the nuclear membrane to allow for specific chemicals to pass through that are necessary For DNA/gene expression and other cellular processes. The nucleolus is found inside the nucleus. It is a large area, in many cases it takes up About 30% of the volume of the nucleus. You can see the DNA in this cell’s nucleus is in threadlike Chromatin form. You can see the DNA in this cell’s nucleus is in threadlike Chromatin form. The nucleolus itself is not surrounded by a membrane, but rather it is a dense area of RNA Structures formed around nuclear organizer Regions. Its main job is to process rRNA molecules and proteins to create the ribosomal subunits that will be used to build Ribosomes.