Roman numbers in the names of restriction enzymes indicate -

A novel strategy to prevent infestation of roots of tobacco plant with the nematode Meloidegyne incognitia is :

The technique of using live organisms or derived enzymes to produce products and processes useful to humans is known as:

Match List I with List II

List - I (Disease)	List - II (Causal organism)
(A) Pneumonia	(I) Protozoan
(B) Common cold	(II) Roundworm
(C) Malaria	(III) Bacteria
(D) Ascariasis	(IV) Virus

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The number of chromosomes in the gamete of a house fly is:

Match List-I with List-II

List-I (Structures)	List-II (Quantity/Dimensions)
(A) Length of ovary	(I) 250
(B) Number of mammary lobes	(II) 4 to 5 cm
(C) Number of compartment in testis	(III) 2 to 4 cm
(D) Length of testis	(IV) 15 to 20

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Read the passage carefully to answer the questions given below
Some strains of `Bacillus thuringiensis` produce proteins that kill certain insects such as lepidopterans (tobacco budworm, armyworm), coleopterans (beetles) and dipterans (flies, mosquitoes). In `Bacillus thuringiensis` the toxin is coded by a gene `crylAc` named cry. There are a number of them, for example, the proteins encoded by the genes `crylAc` and `cryllAb` control the cotton bollworms, that of `crylAb` controls corn borer. Using conventional methods of diagnosis (serum and urine analysis, etc.) early detection is not possible. Recombinant DNA technology, Polymerase Chain Reaction (PCR) and Enzyme Linked Immuno-sorbent Assay (ELISA) are some of the techniques that serve the purpose of early diagnosis. The first clinical gene therapy was given in 1990 to a 4-year old girl with adenosine deaminase (ADA) deficiency. This enzyme is crucial for the immune system to function. The disorder is caused due to the deletion of the gene for adenosine deaminase. `RNAi` takes place in all eukaryotic organisms as a method of cellular defense. This method involves silencing of a specific `mRNA` due to a complementary `dsRNA` molecule that binds to and prevents translation of the `mRNA`.
Which of the following Bt toxin gene controls the corn borer?

Read the passage carefully and answer the questions
Sodium dichromate \(Na _2 Cr _2 O _7\) and Potassium dichromate \(K _2 Cr _2 O _7\) are strong oxidizing agents; in acidic solution, its oxidising action can be represented as follows :
\(Cr _2 O _7^{2-}+14 H ^{+}+6 e^{-} \rightarrow 2 Cr ^{3+}+7 H _2 O \left( E ^{\circ}=1.33 V\right)\)
The chromates and dichromates are interconvertible in aqueous solution depending upon pH of the solution.
The chromate ion is tetrahedral whereas the dichromate ion consists of two tetrahedra sharing one corner with \(Cr - O - Cr\) bond angle of \(126^{\circ}\)
Potassium permanganate is prepared by fusion of \(MnO _2\) with an alkali metal hydroxide and an oxidising agent like \(KNO _3\).
This produces the dark green \(K _2 MnO _4\) which disproportionates in a neutral or acidic solution to give permanganate. It is a strong oxidizing agent. Hydrogen ion concentration of the solution plays an important part in the reduction of permanganate to manganate, manganese dioxide and manganese(II) salt.
Potassium permanganate forms dark purple (almost black) crystals which are isostructural with those of \(KClO _4\).
The salt is not very soluble in water \((6.4 g / 100 g\) of water at 293 K ), but when heated it decomposes at 513 K.
When \(KMnO _4\) is added to oxalic acid solution, the decolourisation is slow in the beginning but becomes faster after some time because

Which of the following is not true with reference to evaporation of liquid?

A man rows 15 km upstream in 5 hours and 25 km downstream in 5 hours each time, then the speed of the stream is

Which of the following are explained in Rutherford's model of an atom?
(A) An atom consists of a core called nucleus.
(B) The nucleus occupies a very small space as compared to the size of atom.
(C) The stability of an atom.
(D) The electrons revolve around the nucleus in various orbits.
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A bag contains 12 white and 18 red balls. Two balls are drawn in succession without replacement. The probability that the first is red and the second is white is:

A and \(B\) throw a pair of dice alternately. A wins the game if he gets a total of 6 and \(B\) wins if he gets a total of 7 . If \(A\) starts the game, the probability of winning the game by \(A\) in the third throw of the pair of dice is: