Name the stain used for observing animal cells / CBSC Class 9th NOTES
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cbsc class 9 Science chapter 5: Notes
Question 4- name the stain used for observing animal cells?
Question 5- who discovered free living cells ?
Question 6- name the scientist who discovered nucleus?
Question 7- who gave the term protoplasm ?
Question 8- what is cell theory? Name the two scientist who gave cell theory?
Question 9- what are unicellular and multicellular organism? Give example
Question 10 – why cells are different shapes ?

Question 11- diffusion and osmosis. Give example ?
Question 12- define the following
Question 13- how do substance like CO2 and water move in and out of the cell? Discuss
Question 14- why is the plasma membrane called a a selectively permeable membrane?
Question 15- how do roots absorb water?
Question 16-Name the process by which exchange of o2 and so2 takes place in organism?
Question 17- what is endocytosis?
Question 18- describe the structure and function of plasma membrane?
Answer- the plasma membrane allow for permits the entry and some material in in and out of the cell. It also prevents movement of some other material.
Question 19- define plasmolysis?
Answer- when a living plant sale losses water through osmosis there is
shrinkage or contration of the contents of the the cell away from the cell wall. This phenomena is known as plasmolysis.
Question 20- what is cell wall?
Answer- plant cell in in addition to the plasma membrane have another rigied outer covering called cell wall. The cell wall lies outside the plasma membrane. The plant cell wall is is mainly composed of cell loss. Cell loss is a complex substance and provide structural strength to plants.
Question 21- what are the function of cell wall?
Answer- the cell wall is an outer protective membrane in many cells including plants, fungi, algae and bacteria. Animal cells do not have a cell wall. The main functions of the cell wall are to provide structure, support and protection for the cell.
Nucleus
The nucleus has a double largest covering called nuclear membrane. The nuclear membrane has pores which allow the transfer of material from inside the nucleus to its outside that is is to the the cytoplasm. The nucleus contents chromosome which are visible as road shaped structures only when the cell is about to drive.chromosome content information for inheritance of character from presents to next generation in the the form of DNA molecules.
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Question 22- what is DNA? What is chromosome and what is genes ?
Question 23- what are the function of nucleus ?
Question 24- right difference between prokaryotic cells and eukaryotic cells.
prokaryotic cells
Eukaryotic cells
Question 25- write a short note on cytoplasm?
Question 26- viruses have any membrane?
Question 27- describe the structure of ER ?
Question 28- describe the function of Endoplasm ?
Question 29- describe structure and function of Golgi apparatus ?
Question 30- describe structure and function of mitochondria?
Question 31- name the type of plastids and give them function?
Question 32- draw chloroplast and describe its structure and function ?
Question 33- can you name the oraganelles we have studied that contain their own genetic material?
Question 34- if the organisation of the the cell is destroyed due to some physical or chemical influence…? What will happen?
Question 35- why are lysosomes known as suicide bags?
* animal cell
Question 2- how is prokaryotic cell different from eukaryotic ?
* prokaryotic cell
Question 3- what would happen if the plasma membrane ruptures aur breaksdown?
Question 4- what would happen to the life of a cell if there were golgi apparatus ?
Question 5- which organells is known as the powerhouse of the cell? Why
Question 6- where do the lipids and proteins constituting the cell membrane get synthesised?