Essay On Nucleus
The Nucleus is the central and most important part of an object, movement, or group, forming the basis for its activity and growth. The nucleus regulates all cell activity. It does this by controlling the enzymes present. An enzyme is a substance produced by living organism that acts as a catalyst to bring about a specific biochemical reaction. The chromatone is composed of DNA. DNA contains the information for the production of protein. The nucleus gives the signal to let the cell grow, divide or make proteins. A nuclear envelope surrounds the nucleus, allowing only certain substance to enter and exist. There are five parts to the nucleus the nucleus consist of the following main parts: The Nucleolemma or nuclear membrane (karyotheca). This …show more content…
Next there’s the Nucleolus which is a small dense spherical structure in the nucleus of a cell during interphase. The last and final part of the nucleus is called the Endosome this is a membrane bounded compartment of the endocytic membrane transport pathway from plasma membrane to the lysosome. Not all cells have a nucleus though. Biology breaks cells into eukaryotic (those with a defined nucleus) and Prokaryotic (those with no defined nucleus). You don’t need a nucleus to have DNA. If you don’t have a defined nucleus, your DNA is probably floating around the cell in a region called the nucleoid. A defined nucleus that holds the genetic code is an advanced feature in a cell. The things that make a eukaryotic cell are a defined nucleus and other organelles. The nuclear envelope surrounds the nucleus and all of its contents. The nuclear envelope is a membrane similar to the cell membrane around the whole cell. There are pores and spaces for RNA and proteins to pass through while the nuclear envelope keeps all of the chromatin and nucleolus inside. When the cell is in a resting state there is something called chromatin in the
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738 Words | 3 PagesA disadvantage of having a cell wall is that it limits the space for organelles. I used a Sony PS memory card and the mother board of a t.v. remote control to resemble the nucleus of a plant cell. This represents a nucleus because the nucleus is the ‘’brains’’ of a cell, and the memory chips are the ‘’brains’’ of the object it was inside. An advantage of having a nucleus is that it confines the genetic material which creates more space for the other organelles in the cell compared to prokaryotic cells having free-floating DNA. A disadvantage of having a nucleus in a more complex cell is that it may result in slow development; the reason for slow development is having more processes to control and protect.
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