Kelvi

Biology questions for 2014

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1. text{In ‘S’ phase of the cell cycle}
2. 

The motile bacteria are able to move by

3. 

A scrubber in the exhaust of a chemical industrial plant removes

4. 

If 20 J of energy is trapped at producer level, then how much energy will be available to peacock as food in the following chain? \newline Plant → Mice → Snake → Peacock

5. Which one of the following statements is correct?
6. Tracheids differ from the tracheary elements in
7. An example of an edible underground stem is
8. Which structures perform the function of mitochondria in bacteria?
9. The solid linear cytoskeletal elements having a diameter of 6 nm and made up of a single type of monomer are known as
10. The osmotic expansion of a cell kept in water is chiefly regulated by
11. During which phase(s) of the cell cycle does the amount of DNA in a cell remain at 4C level if the initial amount is denoted as 2C?
12. Match the following and select the correct answer:
13. Dr. F. Went noted that if coleoptile tips were removed and placed on agar for one hour, the agar would produce a bending when placed on one side of freshly-cut coleoptile stumps. Of what significance is this experiment?
14. Deficiency symptoms of nitrogen and potassium are visible first in
15. In which one of the following processes CO₂ is not released?
16. Anoxygenic photosynthesis is characteristic of
17. A few normal seedlings of tomato were kept in a dark room. After a few days, they were found to have become white-colored like albinos. Which of the following terms will you use to describe them?
18. Which one of the following growth regulators is known as the stress hormone?
19. Geitonogamy involves
20. Male gametophyte with the least number of cells is present in
21. An aggregate fruit is one which developed from
22. Pollen tablets are available in the market for
23. Function of filiform apparatus is to
24. Non-albuminous seed is produced in
25. Which of the following shows coiled RNA strand and capsomeres?
26. Which one of the following is wrongly matched?
27. Transformation was discovered by
28. Fruit colour in squash is an example of
29. Viruses have
30. The first human hormone produced by recombinant DNA technology is
31. An analysis of chromosomal DNA using the Southern hybridization technique does not use
32. In vitro clonal propagation in plants is characterized by
33. An alga which can be employed as food for human beings is
34. Which vector can clone only a small fragment of DNA?
35. An example of ex situ conservation is
36. A location with luxuriant growth of lichens on the trees indicates that the
37. Match the following and select the correct option:
38. A species facing extremely high risk of extinction in the immediate future is called
39. The zone of atmosphere that has the ozone layer is
40. The organization which published the Red List of species is
41. Select the taxon mentioned that represents both marine and freshwater species.
42. Which one of the following living organisms completely lacks a cell wall?
43. Planaria possesses a high capacity for
44. A marine cartilaginous fish that can produce electric current is
45. Choose the correctly matched pair.
46. Choose the correctly matched pair.
47. Select the option which is not correct with respect to enzyme action.
48. Which one of the following is a non-reducing carbohydrate?
49. The enzyme recombinase is required at which stage of meiosis?
50. The initial step in the digestion of milk in humans is carried out by?
51. Fructose is absorbed into the blood through mucosa cells of intestine by the process called
52. Approximately seventy percent of carbon-dioxide absorbed by the blood will be transported to the lungs
53. Person with blood group AB is considered as universal recipient because he has
54. How do parasympathetic neural signals affect the working of the heart?
55. Which of the following causes an increase in sodium reabsorption in the distal convoluted tubule?
56. Select the correct matching of the types of joint with the example in the human skeletal system.
57. Stimulation of a muscle fiber by a motor neuron occurs at
58. Injury localized to the hypothalamus would most likely disrupt
59. Which one of the following statements is not correct?
60. Identify the hormone with its correct matching of source and function.
61. Fight-or-flight reaction causes activation of
62. The shared terminal duct of the reproductive and urinary system in the human male is
63. The main function of mammalian corpus luteum is to produce
64. Select the correct option describing gonadotropin activity in a normal pregnant female.
65. Tubectomy is a method of sterilization in which
66. Which of the following is a hormone-releasing intrauterine device (IUD)?
67. Assisted reproductive technology, IVF involves transfer of
68. A man whose father was color blind marries a woman who had a color-blind mother and normal father. What percentage of their male children will be color-blind?
69. In a population of 1000 individuals, 360 belong to genotype AA, 480 to Aa, and the remaining 160 to aa. Based on this data, the frequency of allele A in the population is
70. A human female with Turner’s syndrome
71. Select the correct option: Direction of RNA synthesis / Direction of reading of the template DNA strand
72. Commonly used vectors for human genome sequencing are
73. Forelimbs of cat, lizard (used in walking), whale (used in swimming), and bat (used in flying) are an example of
74. Which one of the following are analogous structures?
75. Which is the particular type of drug that is obtained from the plants whose one flowering branch is shown below?
76. At which stage of HIV infection does one usually show symptoms of AIDS?
77. To obtain virus-free healthy plants from a diseased one by tissue culture technique, which part/parts of the diseased plant will be taken?
78. What gases are produced in anaerobic sludge digesters?
79. Just as a person moving from Delhi to Shimla to escape the heat for the duration of hot summer, thousands of migratory birds from Siberia and other extremely cold northern regions move to
80. Given below is a simplified model of phosphorus cycling in a terrestrial ecosystem. Identify the blanks.
81. A scrubber in the exhaust of a chemical industrial plant removes
82. Which one of the following shows isogamy with non-flagellated gametes?
83. Five kingdom system of classification suggested by R.H. Whittaker is not based on
84. Which one of the following fungi contains hallucinogens?
85. Archaebacteria differ from eubacteria in their
86. Which one of the following is wrong about Chara?
87. Which of the following is responsible for peat formation?
88. Placenta and pericarp are both edible portions in
89. When the margins of sepals or petals overlap one another without any particular direction, the condition is termed as
90. You are given a fairly old piece of dicot stem and a dicot root. Which of the following anatomical structures will you use to distinguish between the two?