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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.
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संबंधित प्रश्न
State the difference between eukaryotes and prokaryotes
Where are chromosomes found in a cell? State their function.
Name the part of the cell concerned with the following :
The entry of only certain substances into and out of the cell.
Do you think the cells of an elephant would be larger than the cells of a rat? Explain briefly.
Expand - ER
Fill in the blank with a suitable word:
DNA is an abbreviated form of ______.
the question has four options. Choose the correct answer:
Cell theory states
An electron microscope is necessary for the study of ______.
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 _____
