Quiznetik

Biology (GK) | Set 17

1. Which of the following statements about phloem transport is correct?

Correct : D. sugar is transported in phloem as nonreducing sugar

2. What causes the mottling of the dental enamel?

Correct : C. High levels of fluorides in the water

3. Intensive cultivation refers to

Correct : C. raising production by intensive use of existing land

4. Which one of the following statements about PYROLYSIS, which is a process for solid waste treatment is incorrect?

Correct : B. The process occurs at a temperature above 430°C at atmospheric pressure.

5. In bio fortification technique plant breeders use breeding to overcome

Correct : C. Deficiencies of micronutrients and vitamins

6. Rotation of crops is essential

Correct : D. For increasing fertility of the soil.

7. What do you understand by the term Dark Fermentation'?

Correct : D. It is a method to produce Hydrogen as a fuel from waste water.

8. Which of the following listed is not a feature of organic farming?

Correct : C. Use of synthetic fertilizers

9. Which of the following series is true about energy flow in an ecosystem?

Correct : C. Producers --> Consumers --> Decomposers.

10. Rate of cooling depends on the

Correct : D. All of these

11. What is the Kyoto Protocol?

Correct : D. It is an agreement among countries to take steps for reducing global warming

12. For a healthy heart, one needs to take a balanced diet, adequate sleep and -

Correct : C. do right amount of physical exercise

13. Which of the following statements is true?

Correct : B. Whole grain cereals and pulses are more nutritious

14. The main use of salt in the diet is to -

Correct : B. produce in small amounts the hydrochloric acid required for the digestion of food

15. Which of the following correctly explains the phenomenon of "Test Tube Bally"?

Correct : C. When the fertilisation is external and development is internal.

16. Which of the following events occurred first?

Correct : A. DNA structure of genes was discovered by James D Watson and Francis Crick

17. Identify the correct statement with respect to Biogas.

Correct : D. Gas produced by fermentertian of biomass

18. Heart attack occurs due to –

Correct : C. Lack of supply of blood to the heart itself

19. 'Green House Effect' means -

Correct : B. trapping of solar energy due to carbon dioxide gases

20. Fat present below the skin surface in our body acts as a barrier against –

Correct : A. loss of heat from the body

21. Xylem fibres are made up of –

Correct : B. Scierenchyma cells with thick walls

22. Which of the following item is not included in Environmental Auditing?

Correct : B. Scrutiny by the government agencies

23. Membrane lipids of chillsensitive plants contain -

Correct : D. high proportion of unsaturated fatty acids.

24. Natural organic fertilizers are found to be better then chemical fertilizers because –

Correct : C. organic fertilizers sustain soil productivity

25. Select the High Yielding Varieties of seed-crops developed under Green Revolution in India.

Correct : A. Rice, Wheat, Pulses, Oil seeds and Sugarcane

26. Among the following sets of salient features, which set does not exclusively characterize mammals?

Correct : C. Presence of mammary' glands, sweat glands, and diaphragm

27. A person with 'AB' blood group is sometimes called a universal recipient because of the –

Correct : B. lack of antibodies in his blood

28. The duration 19-21 days refers to:

Correct : C. the period of menstrual cycle soon after menstruation, during which fertilisation is most likely to occur

29. 'Kyoto Protocol', an agreerne; signed by various =Indies, is associated with -

Correct : A. Clean Environment and Climate Change

30. Carbon monoxide poisoning can be cured by -

Correct : A. exposing the affected person to fresh oxygen.

31. The main function of insulin in the human body is –

Correct : C. to control the level of sugar in the body

32. The DPT vaccine is given toyoung babies to protect them from –

Correct : D. diphtheria, whooping cough and tetanus

33. Which one of the following is not a benefit of saliva –

Correct : B. It increases RBCs in the body

34. The process of photosynthesis involves conversion of

Correct : C. solar energy into chemical energy

35. When a child is born, what happens to its blood circulation?

Correct : D. Its blood carries wastes for the first time

36. Quarantine regulation is concerned with

Correct : B. prevention of entry of diseased organism

37. Which one of the following set belongs to the class Mammalia?

Correct : D. Whale, Bat, Kangaroo, Hippopotamus

38. Which one of the following is NOT a function of kidney -

Correct : C. Production of antibodies

39. Which is the effect of antigen in an ill person?

Correct : B. It increases the production of antibiotics

40. Which of the following is true?

Correct : A. DNA is the genetic material in most of the organism

41. Which of the following is incorrect?

Correct : D. AIDS causes ono-genital warts

42. Mitosis is a type of cell division in which -

Correct : C. The Chromosome number is doubled

43. The danger signals are red while the eye is more sensitive to yellow because –

Correct : C. the wavelength of red light is more than yellow light

44. Hashish is obtained from aplant. From which part of the plant is it obtained?

Correct : C. Exudate from leaves and female inflorescences.

45. A test tube baby means :

Correct : D. fertilisation in vitro and then transplantation in the uterus.

46. Why radiologists do not take direct X- ray photographs of intestine?

Correct : C. X-rays are not able to capture clear picture

47. What is an antibiotic?

Correct : D. Asynthetic compound inhibiting the growth of bacteria

48. Triple vaccine is administered to a new born child to immunize it against -

Correct : B. whooping cough, tetanus and diphtheria

49. Antidiuretic hormone (ADH) -

Correct : C. causes the muscular walls of the arterioles to contract that simulates the reabsorption of water from the kidney tubules

50. Exobiology deals with the study of -

Correct : D. life in other planets and space

51. Heart attack occurs due to :

Correct : C. Lack of blood supply to the heart itself

52. What is an endoscope?

Correct : A. It is an optical instrument used to see inside the alimentary canal

53. Some viruses have RNA but no DNA. This would indicate that –

Correct : B. these viruses have no heritable information

54. An antibiotic is -

Correct : B. a chemical synthesised by amicro-organism against another micro-organisms

55. Camel is a desert animal, that can live without water for many days, because -

Correct : D. All of the above

56. A clone is a colony of :

Correct : C. cells having similar genetic constitution

57. The age of a tree can be determined more or less accurately by -

Correct : D. counting the number of rings in the trunk

58. Which one of the following is true regarding plant cells and animal cells‘?

Correct : A. Plant cells contain chloroplast while animal cells do not

59. Which of the following is a perfect match?

Correct : D. Hypotension - heart attack

60. In the case of test tube babies

Correct : C. embryo is placed in uterus after 2 months.

61. Which of the following is correct about cold blooded animals?

Correct : B. Their body temperature changes in accordance with the atmosphere