Paper : 2007 ICSE Botony Question Paper

Section - A (30 × 1 = 30 marks)
Note : Answer all the questions. Choose and write the correct option. Each question carries one mark.

1. Bentham and Hooker's classification of plants is an example for
artificial system
natural systemc
phylogenetic system
sexual system

2. ‘Origin of species’ had given stimulus for the creation of classification of plants called
sexual system
natural systemc
phylogenetic system
artificial system

3. Plants having flowers with petals fused with one another are placed under
polypetalae
gamopetalaec
apetalae
calyciflorae

4. Solanaceae is placed under
malvalaes
rosalesc
polemoniales
unisexuales

5. Monothecous anthers are seen in the members of
Malvaceae
Asteraceaec
Fabaceae
Liliaceae

6. Vexillary aestivation is seen in the corolla of
Malavaceae
Asteraceaec
Solanaceae
Fabaceae

7. The type of aestivation seen in the perianth of female flowers of Cocos nucifera is
twisted
descendingly imbricate
valvate
ascendingly imbricate

8. Lacunate collenchyma is seen in
Ipomea
Helianthus
Datura
Nicotiana

9. Root hair develops from
trichoblast
trichome
subsidiary cell
rhizodermis

10. Hypodermis of maize stem is made up of
parenchyma
collenchyma
sclerenchyma
chlorenchyma

11. The vascular bundles are collateral, open and endarch in
monocot stem
monocot root
dicot root
dicot stem

12. Bundle sheath in dicot leaf is made up of
chlorenchyma
parenchyma
sclerenchyma
collenchyma

13. One of the stop codons is
UAA
AAA
CCC
CCA

14. The unit of genetic map is
codon
lux
micrometre
Morgan

15. The 17th human chromosome is
metacentric
submetacentric
telocentric
acrocentric

16. Trisomy is represented by
2n - 1
2n - 2
2n + 2
2n + 1

17. Unorganized mass of undifferentiated tissue is called
explant
callus
somatic embryo
inoculum

18. The enzyme which cleaves DNA at very specific places is called
ligase
polymerase
primase
restriction enzyme

19. The fusogenic agent used in protoplasmic fusion is
manitol
sorbitol
polyethylene glycol
hypochlorite acid

20. The name enzyme was coined by
Buchner
Pasteur
Fischer
Kuhne

21. Protein component of an enzyme is called
co-factor
holoenzyme
apoenzyme
prosthetic group

22. Which one of the following is essential for the formation of chlorophyll?
Manganese
Magnesium
Iron
Copper

23. Which one of the following is a 4 carbon compound?
Glucose
DHAP
Xylulose
Erythrose

24. Hatch-Slack pathway is also known as
glycolysis
C2 Pathway
C3 Pathway
C4 Pathway

25. An example for insectivorous plant is
Viscum
Cuscuta
Monotropa
Drosera

26. Glycolysis takes place in
mitochondrion
cytoplasm
ribosome
peroxisome

27. The rate of growth in length can be measured by
Lever auxanometer
test tube and funnel experiment
Kuhne's experiment
Ganong's experiment

28. Which of the following is widely employed as a successful biofertilizer in Indian rice field?
Sesbania rostrata
Acacia nilotica
Indigofera linifolia
Azolla pinnata

29. Tikka disease of groundnut is caused by
Pyricularia oryzae
Cercospora personata
Xanthomonas citrii
Tungro virus

30. The plant product used to treat heart diseases is
morphine
quinine
digoxin
ephedrine

Section - B (15 × 3 = 45 marks)
Note : Answer any 15 questions. Each question carries 3 marks.

31. What is type specimen?

32. Write the botanical names of any two medicinal plants of Asteraceae and state their uses.

33. Write a note on androecium of Schizanthus pinnatus.

34. Draw the floral diagram of disc floret of Tridax and write its floral formula.

35. Write any three anatomical differences between gymnosperm and angiosperm.

36. What is genome?

37. Write any three significance of crossing over.

38. Write three sentences about genetic code.

39. Define recombinant DNA.

40. How is cell wall removed from intact cells by enzymes?

41. Define energy of activation

42. Differentiate PS I from PS II

43. What is photolysis of water?

44. Under what conditions does cyclic electron transport take place?

45. Write the overall reaction of glycolysis.

46. What is electron transport chain with reference to respiration? State its significance.

47. Define respiratory quotient. What is the respiratory quotient value of glucose?

48. What is bolting?

49. Explain genetically modified organisms in biological warfare.

50. Write any three economic importance of groundnut.

Section - C (7 × 5 = 35 marks)
Answer any 7 questions. Answer to Q.No 55 question is compulsory and this question should not be left as option. Draw diagrams wherever necessary. Each question carries 5 marks.

51. Bring out any five salient features of ICBN.

52. Write the economic importance of the family Rubiaceae.

53. Describe xylem tissue.

54. Draw the internal structure of monocot leaf and label the parts.

55. Describe the vascular tissue system.

56. Draw the structure of Watson and Crick model of DNA and label the parts.

57. Write any five significance of ploidy.

58. State the applications of tissue culture.

59. Write the most important events of recombinant DNA technology.

60. Explain sigmoid growth curve.

61. Explain Fischer's Lock and Key theory of enzyme action.

62. Discuss the benefits of biofertilizers.

Section - D (4 × 10 = 40 marks)
Answer any 4 questions. Draw diagrams wherever necessary | Each question carries 10 marks.

63. Describe Cocos nucifera in botanical terms.

64. 
a. Write a note on economic importance of Fabaceae. (5 Marks) 
b. Differentiate the androecium and gynoecium of Malvaceae to that of Rubiaceae (5 Marks)

65. Describe the anatomy of monocotyledonous stem.

66. Explain the central dogma of molecular biology.

67. Describe the various steps involved in protoplasmic fusion.

68. Explain various steps involved in Calvin cycle.

69. Describe the experiment to demonstrate the liberation of carbon dioxide during respiration. (5 marks)
Write the significance of pentose phosphate pathway. (5 marks)

70. What is sustainable agriculture? Describe its role in modern agricultural practices.