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Class : 8

Subject : Science

Unit : 3.00 Lesson :Living beings and their structure

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1.) What is cytology?

2.) Why is a cell called structural and functional unit?

3.) What is a cell wall?

4.) What is cell membrane?

5.) What are the functions of cell wall and cell membrane?

6.) What is cytoplasm?

7.) Who discovered cell?

8.) What is the function of cytoplasm?

9.) Explain about nucleus?

10.) Why is nucleus called the brain of a cell?

11.) What is nucleus?

12.) What does nuclear membrane produce?

13.) What is nucleoplasm?

14.) What is chromatin?

15.) What is nucleolus?

16.) What are the functions of nucleus?

17.) What is endoplasmic reticulum?

18.) What are the functions of endoplasmic reticulum?

19.) What are smooth and rough ER?

20.) Why is ER called the endoskeleton of the cell?

21.) What is mitochondria?

22.) VR in the Sports Virtual reality technology can be used by coaches and players to train effectively. Players can improve their performance each thne by repeatedly watching and experiencing specific game scenarios. Similarly, this technology is also being

23.) What are the functions of mitochondria?

24.) What are ribosomes?

25.) What are the functions of ribosomes?

26.) Why are ribosomes called protein factories?

27.) What are the functions of golgi complex?

28.) What is golgi complex?

29.) Who discovered golgi complex?

30.) What are golgi bodies made of?

31.) What are the functions of golgi bodies?

32.) What are lysosomes?

33.) Where are lysosomes found?

34.) What are the functions of lysosomes?

35.) Why are lysosomes called suicidal bag of the cell?

36.) What are vacuoles?

37.) What are the functions of vacuoles?

38.) What are plastids? Describe.

39.) What are the functions of plastids?

40.) What are the functions of chloroplast?

41.) What are the functions of chromoplast?

42.) What is the function of leucoplast?

43.) What are centrosomes?

44.) What are the functions of centrosomes?

45.) Differentiate: a) Cytoplasm and Nucleoplasm b) Chloroplast and Chromoplast c) Cell wall and Cell membrane d) Cell organelles and Cell inclusions

46.) Give reason: a) Ribosomes are also called 'protein factories. b) Cell wall provides a fixed shape to pl ant ce lls. c) Metabolism occurs in the cytoplasm d) Cell is considered as the basic unit of life. e) There should be proper coordination among ce ll s

47.) Answer the following questions: a) What is a cell? b) Draw a labelled diagram of plant and animal cells . c) Where are the mitochondria located in a cell? Write their functions. d)Which organelle of the cell undergoes self-digestion and why'? e)Make a lis

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