Kelvi

Biology questions for 2019

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Consider the following features: $\newline$ (a) Organ system level of organisation $\newline$ (b) Bilateral symmetry $\newline$ (c) True coelomates with segmentation of body $\newline$ Select the correct option of animal groups which possess all the above characteristics.

2. Select the correct sequence of organs in the alimentary canal of cockroach starting from mouth:

3. Which of the following pairs of gases is mainly responsible for the greenhouse effect?

4. Which of the following muscular disorders is inherited?

5. The ciliated epithelial cells are required to move particles or mucus in a specific direction. In humans, these cells are mainly present in:

6. Match the Column-I with Column-II

7. Which one of the following is not a method of in situ conservation of biodiversity?

8. In a species, the weight of newborn ranges from 2 to 5 kg. 97% of the newborn with an average weight between 3 to 3.3 kg survive whereas 99% of the infants born with weight from 2 to 2.5 kg or 4.5 to 5 kg die. Which type of selection process is taking place?

9. The correct sequence of phases of the cell cycle is:

10. How does steroid hormone influence the cellular activities?

11. Which of the following statements is not correct?

12. Which one of the following statements regarding post-fertilization development in flowering plants is incorrect?

13. Concanavalin A is

14. Which one of the following equipments is essentially required for growing microbes on a large scale for industrial production of enzymes?

15.

Consider the following statement: $\newline$ (A) Coenzyme or metal ion that is tightly bound to enzyme protein is called a prosthetic group. $\newline$ (B) A complete catalytically active enzyme with its bound prosthetic group is called an apoenzyme. $\newline$ Select the correct option.

16. Purines found both in DNA and RNA are

17. Select the correct sequence for transport of sperm cells in the male reproductive system.

18. Match the hominids with their correct brain size:

19. Variations caused by mutation, as proposed by Hugo de Vries, are:

20. Which of the following pairs of organelles does not contain DNA?

21. Due to increasing air-borne allergens and pollutants, many people in urban areas are suffering from a respiratory disorder causing wheezing due to:

22. Select the incorrect statement.

23. DNA precipitation out of a mixture of biomolecules can be achieved by treatment with:

24. Select the correct group of biocontrol agents.

25. Select the incorrect statement.

26. Match the following organisms with the products they produce:

27. What is the direction of movement of sugars in phloem?

28. In some plants, the female gamete develops into an embryo without fertilization. This phenomenon is known as:

29. Persistent nucellus in the seed is known as:

30. What map unit (Centimorgan) is adopted in the construction of genetic maps?

31. What would be the heart rate of a person if the cardiac output is 5 L, blood volume in the ventricles at the end of diastole is 100 mL, and at the end of ventricular systole is 50 mL?

32. Thiobacillus is a group of bacteria helpful in carrying out:

33. Which of the following factors is responsible for the formation of concentrated urine?

34. Which of the following statements regarding mitochondria is incorrect?

35. Xylem translocates:

36.

Cell in $G_0$ phase:

37. Which of the statements given below is not true about the formation of annual rings in trees?

38. Which of the following ecological pyramids is generally inverted?

39. Placentation in which ovules develop on the inner wall of the ovary or in the peripheral part is:

40. Which of the following protocols aimed to reduce the emission of chlorofluorocarbons into the atmosphere?

41. Which of the following contraceptive methods involve a role of hormone?

42. Tidal Volume and Expiratory Reserve Volume of an athlete is 500 mL and 1000 mL, respectively. What will be his Expiratory Capacity if the Residual Volume is 1200 mL?

43. What is the fate of the male gametes discharged in the synergid?

44. What is the site of perception of photoperiod necessary for induction of flowering in plants?

45. Select the correctly written scientific name of Mango which was first described by Carolus Linnaeus:

46. Following statements describe the characteristics of the enzyme Restriction Endonuclease. Identify the incorrect statement.

47. From an evolutionary point of view, retention of the female gametophyte with a developing young embryo on the parent sporophyte for some time is first observed in:

48. In Antirrhinum (Snapdragon), a red flower was crossed with a white flower and in F1 generation pink flowers were obtained. When pink flowers were selfed, the F2 generation showed white, red, and pink flowers. Choose the incorrect statement from the following:

49. Conversion of glucose to glucose-6-phosphate, the first irreversible reaction of glycolysis, is catalyzed by:

50. The drug called ‘Heroin’ is synthesized by:

51. Select the hormone-releasing Intra-Uterine Devices.

52. A gene locus has two alleles A, a. If the frequency of dominant allele A is 0.4, then what will be the frequency of homozygous dominant, heterozygous, and homozygous recessive individuals in the population?

53. Which of the following is true for Golden rice?

54. Pinus seed cannot germinate and establish without fungal association. This is because:

55. Which of the following features of the genetic code allows bacteria to produce human insulin by recombinant DNA technology?

56. Which of the following sexually transmitted diseases is not completely curable?

57. Which of the following statements is incorrect?

58. Match the following organisms with their respective characteristics:

59. Expressed Sequence Tags (ESTs) refers to:

60. Which of the following statements is incorrect?

61. Match the following terms with their definitions:

62. Which of the following glucose transporters is insulin-dependent?

63. Which of the following immune responses is responsible for the rejection of a kidney graft?

64.

Use of an artificial kidney during hemodialysis may result in: $\newline$ Nitrogenous waste build-up in the body $\newline$ Non-elimination of excess potassium ions $\newline$ Reduced absorption of calcium ions from the gastrointestinal tract $\newline$ Reduced RBC production