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Q1. Milk teeth in a child of 3-4 years do not include
Correct answer : 1
Q2. One of the digestive juices that lacks enzymes but aids digestion is
Correct answer : 3
Q3. If you are standing on your head, the apple being chewed in the mouth
Correct answer : 2
Q4. Prior to absorption, grape sugar is hydrolysed by the enzyme
Correct answer : 4
Q5. Like other body cells, the epithelial cells lining the stomach are protein in nature. Yet the epithelial lining is not digested by the powerful proteolytic enzyme secreted by the stomach because
Correct answer : 4
Q6. Some consumers think it dangerous to eat pork as
Correct answer : 3
Q7. Honey is formed by
Correct answer : 3
Q8. A few drops of saccharine (sweetex) solution spilled on the floor attracts
Correct answer : 4
Q9. Some states in India have imposed a ban on the consumption of kesari dal (Lathyrus sativus) because it causes gradual loss of
Correct answer : 4
Q10. The Central Rice Research Institute of India is located at
Correct answer : 3
Q11. Which one of the following is a micro-element?
Correct answer : 4
Q12. Which one of the following wavelengths of light is most effective in photosynthesis?
Correct answer : 3
Q13. A solution of chlorophyll pigments looks red in reflected light because of
Correct answer : 3
Q14. Which one of the following statements about photosynthesis is not true?
Correct answer : 3
Q15. The carbon of organic compounds in plants comes from
Correct answer : 3
Q16. Which one of the following is a product of the dark reactions of photosynthesis?
Correct answer : 2
Q17. Which of the following scientists was awarded Nobel Prize for his work on photosynthesis?
Correct answer : 1
Q18. Green plants evolve oxygen during the day rather than carbon dioxide. This means that
Correct answer : 3
Q19. "I flatter myself having discovered the method that nature employs to purify air. It is vegetation." Who is credited with this statement and discovery?
Correct answer : 4
Q20. When fishes are kept in an aquarium containing water but no aquatic plants, they frequently come to the surface and float in a semi-vertical position for want of
Correct answer : 2
Q21. Some animals have a unique method of bringing oxygen directly to the cells. These are
Correct answer : 1
Q22. The digestive and breathing passages cross in the
Correct answer : 2
Q23. The approximate per cent oxygen content of air is
Correct answer : 2
Q24. Puncture of the thoracic wall but not of the lung itself will cause
Correct answer : 3
Q25. On a hot sultry afternoon, a fat person sweats far more profusely than a lean one of the same height. This is due to
Correct answer : 4
Q26. Muscle fatigue occurs due to the accumulation of
Correct answer : 4
Q27. If a paste of rice or wheat flour is left overnight in the kitchen, its volume increases significantly because of
Correct answer : 1
Q28. It is not advisable to sleep under a tree at night because of the
Correct answer : 4
Q29. In case of cardiac arrest, what should be the most primary step?
Correct answer : 1
Q30. The blood corpuscles that help to build up resistance against disease are
Correct answer : 3
Q31. The life span of human red corpuscles is
Correct answer : 2
Q32. The rate at which the heart beats per minute in an adult averages
Correct answer : 2
Q33. Once blood clots at a wound, harmful bacteria are prevented from entering by
Correct answer : 2
Q34. Venous blood is carried to the lungs for oxygenation by the
Correct answer : 2
Q35. People who live at high altitudes have rosy cheeks because
Correct answer : 3
Q36. The route of circulation in the human heart is
Correct answer : 2
Q37. The fundamental role of root hairs in plants is
Correct answer : 4
Q38. Water and mineral salts are translocated in plants in the
Correct answer : 1
Q39. The transport of organic substances in plants is through
Correct answer : 3
Q40. Water and mineral salts are translocated through vessels in angiosperms. The maximum length of such a vessel is
Correct answer : 4
Q41. The volume of urine produced in an adult human every 24 hours is
Correct answer : 2
Q42. The artificial kidney operates on the principle of
Correct answer : 2
Q43. The least toxic of nitrogenous wastes is
Correct answer : 2
Q44. The excreta of lizards and birds contains a white component which is chemically
Correct answer : 3
Q45. The control centres that regulate hunger, water balance and body temperature are located in the
Correct answer : 1
Q46. The rate and force of the heartbeat, the secretion of glands of the alimentary tract and the contraction of involuntary muscles are controlled by the
Correct answer : 1
Q47. The cerebellum
Correct answer : 1
Q48. Encephalitis occurs when
Correct answer : 2
Q49. A person will have brown eyes, blue eyes or black eyes depending upon the particular pigment present in the
Correct answer : 2
Q50. While swallowing a tablet of chloroquin, one experiences its bitter taste when it accidentally comes in contact with the