Recent questions tagged past papers

Which of the following is commonly used as a vector for introducing a DNA fragment in human lymphocytes ?

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A 'new' variety of rice was patented by a foreign company, though such varieties have been present in India for a long time. This is related to

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Plants having little or no secondary growth are

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Casparian strips occur in

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Select the wrong statement :

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Which of the following statements is correct ?

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Sweet potato is a modified

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Pneumatophores occurs in

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Secondary xylem and phloem in dicot stem are produced by

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Match the item given in Column I with those in Column II and select the correct option given below :

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Which one is wronly matched ?

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After karyogamy followed by meiosis, spores are produced exogenously in

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Winged pollen grains are present in

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Which of the following pairs is wrongly matched ?

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Which of the following flowers only once in its life-time ?

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The experimental proof for semiconservative replication of DNA was first shown in a

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Select the correct match

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Which of the following has proved helpful in preserving pollen as fossils ?

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Select the correct statement

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Offsets are produced by

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Which of the following is not a product of light reaction of photosynthesis?

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The Golgi complex participates in

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Two two functional groups characteristic of sugars are

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Stomata in grass leaf are

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Stomatal movement is not affected by

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Which among the following is not a prokaryote ?

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Which of the following is true for nucleolus ?

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The stage during which separation of the paired homologous chromosomes begins is

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Pollen grains can be stored for several years in liquid nitrogen having a temperature of

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Double fertilization is

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Which of the following elements is responsible for maintaining turgor in cells ?

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In which of the following forms is iron absorbed by plants ?

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Which one of the following plants shows a very close relationship with a species of moth, where none of the two can complete its life cycle without the other ?

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Oxygen is not produced during photosyntheis by

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What is the role of $NAD^+$ in cellular respiration ?

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Which of the following is a secondary pollutant ?

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Niche is

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In stratosphere, which of the following elements acts as a catalyst in degradation of ozone and release of molecular oxygen ?

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World Ozone Day is celebrated on

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Natality refers to

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What type of ecological pyramid would be obtained with the following data ? Secondary consumer : 120 g Primary consumer : 60 g Primary producer : 10 g

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Identify the major products P, Q and R in the following sequence of reactions :

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Which of the following compounds can form a zwitterion ?

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Given var der Waals constant for $NH_3, H_2, O_2$ and $CO_2$are respectively 4.17, 0.244, 1.36 and 3.59, which one of the following gases is most easily liquefied ?

asked Aug 21, 2018 by pady_1

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The solubility of $BaSO_4$ in water is $2.42 \times 10^{-3} gL^{-1}$ at 298 K. The value of its solubility product $(K_{sp})$ will be (Given molar mass of $BaSO_4 = 233 \; g\;mol^{-1}$ )

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On which of the following properties does the coagulating power of an ion depend ?

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Following solutions were prepared by mixing different volumes of $NaOH$ and $HCl$ of different concentration : pH of which one of them will be equal to 1 ?

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The type of isomerism shown by the complex $[CoCl_2(en)_2]$ is

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Which one of the following ions exhibits d-d transition and paramagnetism as well ?

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The geometry and magnetic behaviour of the complex $[Ni(CO)_4]$ are

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