1. Name the largest cell
2. Name two cells with cell wall.
3. Name the animal cell which does not possess nucleus.
4. Name the stain used for staining onion peel cells
5. What is cell?
6. Who discovered cell?
7. Which is the longest cell in human body?
8. Who proposed cell theory?
9. Which chemical is used to stain human cheek cells?
10. While preparing temporary mount, why peels should be kept in water?
11. Why is cell called structural and functional unit of life?
12. What is cell made up of?
13. Who observed cell first time?
14. Why is red blood cells biconcave in shape?
15. Why are RBCs red in colour?
16. Cell wall is present in animal cell or plant cell?
17. What is the unit of nervous system?
18. What is nucleoid?
19. What is plasmolysis?
20. What is osmosis?
Answers
Answer:
1: Egg of ostrich...
2: bacteria and fungi...
3: red blood cell
4: iodine
5: structural and functional unit of an organism
6: Robert Hooke
7: neurons
8: Jakob Matthias Schleiden
9: Methylene blue
10: The peel is kept in water as the peel in water remains unfolded floating in the water and peel also remain fresh as it does not get dried.
11: As all living organisms are made of cells that is why it is called functional and structural unit of life
12: cell is made up of biological molecules
13: Robert Hooke
14:
Answer:
1.ans: The largest cell is ostrich egg
2.ans: Animal cell and plant cells
3.ans: RBCs does not possess nucleus
4.ans: Dilute stain is required for staining
5.ans: Cells are structural and functional unit of life
6.ans: The cell was first discovered by an English Scientist Robert Hooke in 1665
7.ans: Nerve cells are the longest cells in human body
8.ans: Schleiden and Schwann proposed cell theory
9.ams: Methylene blue is used to stain human cheek cellls
10.ans: While preparing temporary mount,peels should be kept in water because water opens the stomata in the peels
11.ans: Cells are called structural and functional unit of life because all the living organisms are made up of cells and also the functions taking place inside the body of organisms are performed by cells
12.ans:Cell are made up of organelles such as nucleus,golgi,endoplasmic,ribosome,mitochondrion etc.
13.ans: Cells are fist observed by Anton Von Leeuwenhoek in 1674
14.ans: RBCs are biconcave in shape because this shape optimizes the flow properties of blood in the large vessels.
15.ans: RBCs are red in color due to the presence of haemoglobin
16.ans: Cell is present in both cells plant cells and animal cells
17.ans: The unit of nervous system is neuron (nerve cells)
18.ans: The nucleoid is an irreg5 shaped regionwithin the cell of a prokaryote that contains all or most of the genetic material
19.ans: Plasmolysis is the process in which cells lose water in a hypertonic solution
20.ans: Osmosis is the spontaneous net movement of solvent molecules through a selectively permeable membrane into a region of high water concentration to low concentration