What is nucleus? Explain in 30 - 40 words.
Answers
Explanation:
The nucleus is an organelle found in most eukaryotic cells, the exception being red blood cells. In animal cells it is both the largest and stiffest organelle and is easily identifiable by light microscopy. The average mammalian nucleus has a diameter of ~6µm and occupies about 10% of the total cell volume.
A schematic of the nucleus inside a cell. 1. The nucleus; 2. Nuclear Lamina; 3. Nucleoplasm; 4. Euchromatin; 5. Heterochromatin; 6. The nucleolus; 7. The nuclear envelope; 8. Ribosomes; 9. Nuclear pore; 10. Rough Endoplasmic Reticulum;
The primary functions of the nucleus are to store the cell’s DNA, maintain its integrity, and facilitate its transcription and replication. The nuclear contents, which include the genetic material and the many proteins required for its processing, are enclosed within a double membrane known as the nuclear envelope, but remain functionally connected to the cytoplasm via nuclear pores. It is through these pores that RNA can be transported to the cytoplasm for further processing.
★ NUCLEUS ★
Nucleus is one of the most important part of the cell. Nucleus generally lies in the centre of the cell , however in some cases it may also occupy peripheral positions. All the activities in the cell controls by nucleus. The nucleus is a dense structure bounded by A nucleus membrane. Nucleus hase a thread like network known as chromatin.The protoplasm of the nucleus is called nucleoplasm.
★ CELL MEMBRANE ★
All the living cells are bounded by a membrane called the plasma membrane or the cell membrane. It surrounds its Inner gel - like material called protoplasm. The entry and exit of substances as per the requirements of the cell are control by the cell cell membrane.