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प्रश्न
Write short notes on the following.
Nucleus of a cell
उत्तर
Nucleus of a cell: The nucleus is a spherical structure generally present at the centre of a cell. The nucleus is composed of the following components:
1) Nuclear membrane: It is a double-layered membrane which separates the contents of the nucleus from the cytoplasm. The nuclear membrane has nuclear pores that allow the transfer of specific substances in and out of the nucleus.
2) Nucleolus: It is a small spherical body that is not bound by any membrane.
3) Chromosomes: These are thread-like structures that carry genes. Genes contain information necessary for the transfer of characteristics from the parents to the offspring. Thus, chromosomes play an important role in the inheritance of characteristics.
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संबंधित प्रश्न
Where are chromosomes found in a cell? State their function.
Explain why chloroplasts are found only in plant cells?
What is the name of the chemical substance which constitutes the genes?
What was the contribution of the following to our knowledge of cells?
Virchow
What is the function of the following?
Mitochondria
What is a chromosome?
Fill in the blank with a suitable word:
______ controls all the metabolic activities of the cell.
the question has four options. Choose the correct answer:
The word cell was given by
An electron microscope is necessary for the study of ______.
Under the microscope, Priya observes a cell that has a cell wall and distinct nucleus. The cell that she observed is
