Recent questions tagged 2004

Diversification in plant life appeared :-

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Cell elongation in internodal regions of the green plants takes place due to :-

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The most abundant element present in the plant is :-

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The technique of obtaining large number of plantlets by tissue culture method is called –

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Photosynthetically active radiation (PAR) represents the following range of wave length

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Which one of the following is the correct matching of a vitamin, its nature and its deficiency disease :

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The following ratio is generally constant for a given species :-

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The most likely reason for the development of resistance against pesticides in insects damaging a crop is :-

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India's wheat yield revolution in the 1960s was possible primarily due to :-

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A male human is heterozygous for autosomal genes A and B and is also hemizygous for hemophilic gene h. What proportion of his sperms will be abh :-

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In the somatic cell cycle :-

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Dough kept overnight in warm weather becomes soft and spongy becauses of :-

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In a mutational event, when adenine is replaced by guanine, it is a case of -

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Which of the following statements is not true for retroviruses :-

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Crossing over that results in genetic recombination in higher organisms occurs between :-

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In the resting state of the neural membrane, diffusion due to concentration gradients, if allowed, would drive :-

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Restriction endonucleases :-

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The maximum growth rate occurs in :-

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The animals with bilateral symmetry in young stage and radial pentamerous symmetry in the adult stage, belong to the phylum -

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Flagella of prokaryotic and eukaryotic cells differ in :-

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DNA fingerprinting refers to :-

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In which one of the following enzymes, is copper necessarily associated as an activator -

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Lead concentration in blood is considered alarming if it is -

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One set of a plant was grown at 12 hours day and 12 hours night period cycles and it flowered while in the other set night phase was interrupted by flash of light and it did not produce flower. Under which one of the following categories will you place this plant ?

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Which one of the following preceeds re- formation of the nuclear envelope during M phase of the cell cycle :- lood

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The most thoroughly studied of the known bacteria-plant interactions is the :-

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What is a keystone species ?

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The cardiac pacemaker in a patient fails to function normally. The doctors find that an artificial pacemaker is to be grafted in him. It is likely that it will be grafted at the site of -

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Using anhydrous $AlCl_3$ as catalyst, which one of the following reactions produces ethylbenzene (PhEt) :-

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The rapid change of pH near the stoichiometric point of an acid-base titration is the basis of indicator detection. pH of the solution is related to ratio of the concentrations of the conjugate acid (HIn) and base (In–) forms of the indicator by the expression -

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Which of the following coordination compounds would exhibit optical isomerism

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Among the following series of transition metal ions, the one where all metal ions have $3d^{2}$electronic configuration is :-

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Among $[Ni(CO)_4]$$[Ni(CN)_4]^{2-}$,$[NiCl_4]^{2-}$,species, the hybridization states at the Ni atom are, respectively :- (At. No. of Ni = 28)

asked Jul 24, 2018 by pady_1

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The enzyme which hydrolysis triglycerides to fatty acids and glycerol is called :-

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The radioactive isotope $^{60}_{27}Co$which is used in the treatment of cancer can be made by (n, p) reaction. For this reaction the target nucleus is :-

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A compound formed by elements X and Y crystallizes in a cubic structure in which the X atoms are at the corners of a cube and the Y atoms are at the face-centers. The formula of the compound is :-

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The maximum number of molecules is present in:-

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Which is the best description of the behavior of bromine in the reaction given below:-$H_2O+Br_2\to HOBr+HBr$

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In a regular octahedral molecule, $MX_6$ the number of X–M–X bonds at 180º is :-

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Aniline when diazotized in cold and then treated with dimethyl aniline gives a coloured product. Its structure would be :-

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$H_2O$ is dipolar, whereas $BeF_2$ is not. It is because:-

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Which of the following is least reactive in a nucleophilic substitution reaction :-

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Number of chiral carbons in $ \beta–D–(+)– $ glucose is: -

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Camphor is often used in molecular mass determination because :-

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The frequency of radiation emitted when the electron falls from n = 4 to n = 1 in a hydrogen atom will be (Given ionization energy of $H = 2.18\times 10^{-18} J atom^{-1}$ and $h=6.625\times 10^{-34} Js$):

asked Jul 24, 2018 by pady_1

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In an octahedral structure, the pair of d orbitals involved involved in $d^2sp^3$ hybridization is :-

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Which one of the following can be oxidised to the corresponding carbonyl compound :-

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A sequence of how many nucleotides in messenger RNA makes a codon for an amino acid :-

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The correct statement in respect of protein haemoglobin is that it :-

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Which one of the following is a chain growth polymer :-

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