Advertisements
Advertisements
Question
Write short notes on the following.
Nucleus of a cell
Solution
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.
APPEARS IN
RELATED QUESTIONS
Carry out the following osmosis experiment:
Take four peeled potato halves and scoop each one out to make potato cups. One of these potato cups should be made from a boiled potato. Put each potato cup in a trough containing water. Now,
- Keep cup A empty
- Put one teaspoon of sugar in cup B
- Put one teaspoon salt in cup C
- Put one teaspoon sugar in the boiled potato cup D.
Keep these for two hours. Then, observe the four potato cups and answer the following:
- Explain why water gathers in the hollowed portion of B and C.
- Why is potato A necessary for this experiment?
- Explain why water does not gather in the hollowed-out portions of A and D.
Which one of the following is found both in the cells of a mango plant and a monkey?
Name the scientist who invented the first microscope
Fill up the blank with the terms given below
All cells arise from ______ cells
Justify the statement "cell is the basic unit of life"
Define the term cell? Also, describe types of cells.
Fill in the blank with a suitable word:
DNA is an abbreviated form of ______.
What is difference between us?
Prokaryotic cell and eukaryotic cell.
Who proposed the "Cell theory"?
