Explain briefly the structure of nucleus with the held of a diagram.State two functions of nucleus.Class 8
Answers
Answer:
The Nucleus is the control centre of eukaryotic cells. It is also responsible for the coordination of genes and gene expression. The structure of the nucleus includes nuclear membrane, chromosomes, nucleoplasm, and nucleolus. ... The Nucleus is detached from the rest of the cell or the cytoplasm by a nuclear membrane.
Explanation:
The nucleus has 2 primary functions: It is responsible for storing the cell's hereditary material or the DNA. It is responsible for coordinating many of the important cellular activities such as protein synthesis, cell division, growth and a host of other important functions.
Answer:
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Explanation:
The nucleus is considered as the director or controller of the cell.
The nucleus is a double membrane-bound organelle. The nuclear envelope consists of two membranes, an outer membrane, and an inner membrane.
The nuclear membrane is perforated by apertures known as nuclear pores.
Nuclear membranes surround the cytoplasm of nucleus known as nucleoplasm. DNA is present in nucleoplasm in the form of chromatin. When the cell prepares to divide, the chromatin condenses and thickens into chromosomes.
Within the nucleus is present a spherical body known as nucleolus which is closely associated with nucleolar organizer region of two or more chromosomes of the set.
Two functions of Nucleus
- It regulates cell metabolism by synthesizing various enzymes
- It is the site for the synthesis of ribonucleic acid or RNA that acts as a template for the synthesis of various proteins in the cell. It is also the site for the synthesis of the protein factories of the cell called the ribosomes
Diagram
