41. When there is a decrease in the concentration of oxygen in the blood, the rate of breathing:
decreases
increases
does not change
first decreases, then increases
42. Match List–I with List–II and select the correct answer using the codes given below the lists: List–I List–II (Molecules) (Elements present) A. Vitamin B12 1. Magnesium B. Haemoglobin 2. Cobalt C. Chlorophyll 3. Copper D. Brass 4. Iron Codes: A B C D
2 4 1 3
2 1 3 4
4 1 2 3
3 4 2 1
43. Which of the following is not correctly matched?
autotroph – producer
heterotroph – consumer
saprotroph – decomposer
herbivore – secondary consumer
44. The solar energy plays the most important role in the:
Carbon cycle
Oxygen cycle
Nitrogen cycle
Water cycle
45. Consider the following statements about haemoglobin: 1. It contains iron. 2. It is a carrier of oxygen in the blood. 3. It imparts red colour to the blood. 4. It provides immunity against certain diseases. Of these statements:
1, 2 and 4 are correct
1, 2 and 3 are correct
2, 3 and 4 are correct
1, 3 and 4 are correct
46. Which of the following is associated with potassium deficiency?
Kidney damage and paralysis of muscles
Low blood pressure
Hip-joint replacement
Blood transfusion
47. In surgery, what is arthroplasty?
Open heart surgery
Kidney transplant
Hip-joint replacement
Blood transfusion
48. Blank capsules used in dispensing are made of:
egg-white
gum
starch
gelatin
49. Which hormone is known as 'fight or flight' hormone?
Insulin
Adrenaline
Estrogen
Oxytocin
50. The vitamin which contains cobalt is:
B1
B2
B6
B12
51. Laser beam is used for
treatment of cancer
treatment of heart
treatment of eye
treatment of kidney
52. Genome mapping relates to
blood grouping
mapping of genes
mapping of nerve centres
mapping of brain
53. Which one of the following fibres is not a product of plant stem?
Flax
Hemp
Jute
Cotton
54. Which one of the following are useful in the detection of landmines?
Bee
Wasp
Butterfly
Moth
55. Saffron is a dried mixture of
leaf and stem
petals and roots
seed-forming parts of a flower
seeds and buds
56. Consider the following statements about haemoglobin and select the correct answer from the codes given below: (1) It contains iron. (2) It imparts red colour to the blood. (3) It provides immunity against certain diseases. (4) It is a carrier of oxygen in blood. Codes:
1, 2 and 3
2, 3 and 4
1, 2 and 4
1, 2, 3 and 4
57. Which one of the following is not correctly matched?
ginger – rhizome
saffron – seeds
opium – poppy of opium
flax – stem
58. Dinosaurs were:
Cenozoic reptiles
Mesozoic birds
Palaeozoic amphibia
Mesozoic reptiles
59. Which one of the following is not a natural polymer?
Wool
Silk
Leather
Nylon
60. Curry-leaf tree, native of India, has the potential of a multi-billion dollar production for the pharmaceutical companies, as revealed by the British researchers. Cure by curry-leaf is claimed for:
Blood pressure
Diabetes
Malaria
Tuberculosis
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