Recent questions tagged 2009

Montreal protocol aims at :

asked Jul 26, 2018 by pady_1

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Which one of the following has maximum genetic diversity in India ?

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Which one of the following types organisms occupy more than one trophic level in a pond ecosystem ?

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When breast feeding is replaced by less nutritive food low in proteins and calories, the infants below the age of one year are likely to suffer from :

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A change in the amount of yolk and its distribution in the egg will effect :

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The correct sequence of spermatogenetic stages leading to the formation of sperms in a mature human testis is :

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Which one of the following is considered important in the development of seed habit ?

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Elbow joint is an example of :

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Which one of the following correctly described the location of some body parts in the earthworm Pheretima ?

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Which one of the following statement is true regarding digestion and absorption of food in humans :

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Which one of the following is the correct matching of three items and their grouping category ? OPTIONS :

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Which part of human brain is concerned with the regulation of body temperature ?

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What will happen if the stretch receptors of the urinary bladder wall are totally removed ?

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Compared to blood our lymph has :

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Which one of the following is correct pairing of a body part and like kind of muscle tissue that moves it ?

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Which one of the following pairs of food compounds in humans reaches the stomach totally undigested -

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Uric acid is the chief nitrogenous component of the excretory products of -

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In a standard ECG which one of the following alphabets is the correct represention of the respective activity of the human heart ?

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The annular and spirally thickened conducting elements generally develop in the protoxylem when the root or stem is -

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A fruit developed from hypanthodium inflorescence is called :

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Oxygenic photosynthesis occurs in :

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Manganese is required in :

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Guard cells help in :

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An example of a seed with endosperm, perisperm and caruncle is -

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Cotyledons and testa respectively are edible parts in -

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In the case of peppered moth (Biston betularia) the black-coloured from became dominant over the light-coloured form in England during industrial revolution. This is an example of -

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Point mutation involves :

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Whose experiments cracked the DNA and discovered unequivocally that a genetic code is a "triplet" ?

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Semiconservative replication of DNA was first demonstrated in :

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Removal of introns and joining the exons in a defined order in a transcription unit is called :

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What is not true for genetic code?

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Synapsis occurs between :

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Stroma in the chloroplast of higher plant contains :

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Plasmodesmata are :

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If a live earthworm is pricked with a needle on its outer surface without damaging its gut, the fluid that comes out is :

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Which one of the following pairs of animals comprises 'Jawless fishes' ?

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Peripatus is a connecting link between :

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The segment of DNA which acts as the instrument manual for the synthesis of the protein is :

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The state of hybridization of $C_2, C_3, C_5$ and $C_6$ the hydrocarbon â€“ is in the following sequence :

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Consider the following reaction : $Phenol \xrightarrow{Zn\; dust} X \xrightarrow[Anhydrous \;AlCl_3]{CH_3Cl} Y \xrightarrow{Alkaline \; KMnO_4} Z,$ the product of Z is :

asked Jul 26, 2018 by pady_1

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Trichloroacetaldehyde,$ CCl_3 CHO$ reacts with chlorobenzene in presence of sulphuric acid and produces -

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Which one of following is employed as a tranquilizer ?

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Which of the following reactions is an example of nucleophilic substitution reaction ?

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Nitrobenzene can be prepared from benzene by using a mixture of conc.$ HNO_3$ and conc. $H_2SO_4$ . In the mixture, nitric acid acts as a/an -

asked Jul 26, 2018 by pady_1

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Benzene reacts with $CH_3 Cl $in the presence of anhydrous $AlCl_3$ to form -

asked Jul 26, 2018 by pady_1

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Consider the following reaction $Ethanol \xrightarrow{PBr_3} X \xrightarrow{ alc. KOH} Y \xrightarrow[{(i)\;H_2O ,\; Heat}]{(i)\; H_2SO_4 room\; temperature} Z$ The product Z is :

asked Jul 26, 2018 by pady_1

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Which of the following does not show optical isomerism - (en = Ethylenediamine)

asked Jul 26, 2018 by pady_1

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Out of $TiF_6^{2-}$and $CoF_6^{3-}$ , $Cu_2Cl_2$ and $NiCl_4^{2-}$ (Z of Ti = 22, Co = 27, Cu = 29, Ni = 28) the colourless species are : -

asked Jul 26, 2018 by pady_1

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Which of the following complex ions is expected to absorb visible light ? {At no. Zn = 30, Sc = 21, Ti = 22, Cr = 24)

asked Jul 26, 2018 by pady_1

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What is the dominant intermolecular force or bond that must be overcome in converting liquid $CH_3$ OH to a gas -

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