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प्रश्न
Write short notes on the following.
Nucleus of a cell
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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.
संबंधित प्रश्न
Write short notes on the following.
Cytoplasm
Where are chromosomes found in a cell? State their function.
Explain why chloroplasts are found only in plant cells?
The cell organelle that helps in the respiration of the cell is :
Who coined the term “cell” ?
Write a short answer.
Why is a cell called the structural unit of a living organism?
Fill in the blank with a suitable word:
______ controls all the metabolic activities of the cell.
When will you use a simple microscope and when, a compound microscope? Explain in detail how you will use them.
The instrument used to observe the cell is _____
Nerve cell is the longest cell
