What protects the cell and its nucleus?
The nucleus contains all of the genetic material for a eukaryotic cell, but this genetic material needs to be protected. And it’s protected by the nuclear membrane, which is a double membrane that encloses all the nuclear genetic material and all the other components of the nucleus.
Why is the nucleus important?
The nucleus is considered to be one of the most important structures of eukaryotic cells as it serves the function of information storage, retrieval and duplication of genetic information. It is a double membrane-bound organelle that harbours the genetic material in the form of chromatin.
What does the nucleus do?
The nucleus controls and regulates the activities of the cell (e.g., growth and metabolism) and carries the genes, structures that contain the hereditary information. Nucleoli are small bodies often seen within the nucleus.
What are the 3 main things in a nucleus?
The nucleus consists of the following main parts: (1) Nucleolemma or nuclear membrane (karyotheca) (2) Nuclear sap or karyolymph or nucleoplasm (3) Chromatin network or fibres (4) Nucleolus (5) Endosomes.
How does the nucleus protect DNA?
In eukaryotic cells the nuclear envelope isolates and protects DNA from molecules that could damage its structure or interfere with its processing. Moreover, selected protection enzymes and vitamins act as efficient guardians against toxic compounds both in the nucleoplasm and in the cytosol.
What structures protect the cell?
The cell wall is a mesh of fibers that surrounds the plasma membrane. It protects and supports the cell.
How does the nucleus control the activities of a cell?
The nucleus directs all cellular activities by controlling the synthesis of proteins. The nucleus contains encoded instructions for the synthesis of proteins in a helical molecule called deoxyribonucleic acid (DNA). … Within the nucleus, DNA is translated into a molecule called messenger ribonucleic acid (mRNA).
Which character characterizes microvilli?
Statements that characterize microvilli. They are smaller than cillia. They function to increase the surface area of the plasma membrane. They are microscopic projection of the plasma membrane.