Basic Questions on "Photosynthesis"

1.      Define photosynthesis.

2.    What is chlorophyll?

3.    What is chloroplast?

4.    What are thylakoids?

5.    What are grana?

6.    Where is chlorophyll present in chloroplast?

7.    Where are chloroplasts present in leaves?

8.    Name the elements present in chlorophyll.

9.    What is cuticle?

10. What are palisade cells?

11. How many chloroplasts are present in per square mm of leaf surface?

12. Name two best known chlorophylls.

13. Which part of visible spectrum is absorbed by chlorophyll?

14. Why does chlorophyll appear green?

15. Is chlorophyll sensitive to light?

16. Is light important for the formation of chlorophyll.

17. Why does grass growing in the shade under a stone turns yellowish.

18. How do stomata minimize the transpiration from leaves?

19. Why does carbon di oxide not diffuse at night through leaves?

20. Explain the structure of guard cells with help of diagram.(both open and closed)

21. Explain sugar concentration theory of opening and closing of stomata.

22. Explain potassium ion concentration theory of opening and closing of stomata.

23. Write full form of ATP.

24. What is ATP?

25. What is adenosine?

26. Which layer of mesophyll cells trap light energy?

27. What are palisade cells?

28. Are chloroplasts present in palisade cells?

29. How does diffusion of carbon di oxide take place in leaf?

30. How does water is absorbed by root hair cells?

31. What is the formula for glucose?

32. How many carbon di oxide molecules are required to make one molecule of glucose?

33. How many water molecules are required to make one molecule of glucose?

34. How many water molecules are liberated during formation of single molecule of glucose in photosynthesis?

35. What do you think that the liberated water molecules are from original absorbed water molecules? Explain with help of chemical equation.

36. Write two main phases of photosynthesis.

37. In which part of chloroplast light reaction takes place.

38. How does activation of chlorophyll take place during light reaction (photochemical phase)?

39. How does splitting of water molecule take place during light reaction (photochemical phase)?

40. What is photolysis?

41. How does formation of NADPH take place during light reaction (photochemical phase)?

42. Which reactant of photosynthesis process liberates oxygen?

43. How does formation of ATP take place during light reaction (photochemical phase)?

44. What is required to convert ADP(adenosine diphosphate) into energy rich compound ATP?

45. What is phosphorylation?

46. What is photophosphorylation?

47. What is the another name of light dependent reaction?

48. What is rubisco?

49. What is polymerisation?

50. Write adaptations in leaf for photosynthesis.

51. Why does less photosynthesis takes place narrow leaves?

52. Why do some plants like oleander and pines have narrow leaves?

53. Why do the cuticle and epidermis are transparent in leaves.

54. Why do leaves arrange at right angle in most of the plants?

55. What will happen if large number of chloroplasts are present in upper layers of leaves?

56. In which type of leaves more photosynthesis takes place thin leaves or thick leaves?

57. In how many ways simple sugar glucose is used by plants.

58. Do plants re-utilize water produced in photosynthesis?

59. Do plants release all oxygen produced in photosynthesis?

60. Why do plants convert simple sugar glucose into insoluble starch?

61. What plants do with insoluble starch?

62. What is translocation?

63. Where does starch in potato comes from?

64. Write factors affecting photosynthesis.

65. Photosynthesis increases with the light intensity up to certain limit only and then it get stabilized at the 0.02% concentration of carbon dioxide but at this point if carbon dioxide is increased up to 0.05%then photosynthesis also increases further and gain get stabilized. Explain this process with help of diagram.

66. What is the optimum temperature for photosynthesis?

67. What happens to the process of photosynthesis at 40 degree C?

68. Is rise of 10 degree C up to optimum temperature (35 degree C) doubles the rate of photosynthesis?

69. How much absorbed water is utilized in process of photosynthesis?

70. How does nutritional deficiency affect the process of photosynthesis?

71. Does dehydration of protoplasm affect the process of photosynthesis?

72. Does the accumulation of carbohydrates reduce the rate of photosynthesis?

73. Write importance of photosynthesis in nature.

74. Explain carbon cycle in nature with help of digram.

75. Explain food chain of forest.