The sickle cell anaemia is a

Read the following passage carefully and answer the given questions.
Bioactive molecule, cyclosporin A, that is used as an immunosuppressive agent in organ-transplant patients, is produced by the fungus Trichoderma polysporum. Statins produced by the yeast Monascus purpureus have been commercialised as blood-cholesterol lowering agents. It acts by competitively inhibiting the enzyme responsible for synthesis of cholesterol. Baculoviruses are pathogens that attack insects and other arthropods. The majority of baculoviruses used as biological control agents are in the genus Nucleopolyhedrovirus. These viruses are excellent candidates for species-specific, narrow spectrum insecticidal applications. They have been shown to have no negative impacts on plants, mammals, birds, fish or even on non-target insects. BOD refers to the amount of the oxygen that would be consumed if all the organic matter in one liter of water were oxidised by bacteria. The sewage water is treated till the BOD is reduced. Cheese, is one of the oldest food items in which microbes were used. Different varieties of cheese are known by their characteristic texture, flavour and taste. For example, the large holes in 'Swiss cheese' are due to production of a large amount of CO₂ by a bacterium named Propionibacterium sharmanii.
Statins are produced by:

The enzyme which is used to remove nucleotides from the ends of DNA fragment is-

Which one of the followings is not a step in amplification of gene of interest using PCR?

Match List-l with List-II

List-l (Terms)	List-ll (Features)
(A) IgE	(I) Formed by yeast
(B) IgA	(II) Cellular barrier
(C) Hepatitis B vaccine	(III) Antibodies due to allergens
(D) Polimorpho- nuclear leucocytes	(IV) Present in colostrum

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Arrange the stages of HIV infection in humans sequentially.
(A) Introduction of viral DNA in the cell
(B) Production of multiple viruses
(C) Infection of human cell by virus
(D) Incorporation of viral DNA into host genome
Choose the correct answer from the options given below:

The Abingdon tortoise became extinct in Galapagos islands due to introduction of which of the following animal?

In series LCR circuit, the rms potential drop across R, L and C are V, 2 V and 2 V volts respectively. The source voltage is:

If 'n' identical resistors, each of value 'R' are first connected in series to a battery of emf 'E' and internal resistance 'R', the current drawn is 'I'. Now if they are connected in parallel, then the current drawn is '5 I'. The value of n is

Answer the question on basis of passage given below :
Alcohols and phenol are formed when a hydrogen atom in a hydrocarbon, aliphatic and aromatic respectively, is replaced by -OH group. The substitution of a hydrogen atom in a hydrocarbon by an alkoxy or aryloxy group forms ethers.
Alcohols and phenol consist of two part, an alkyl/aryl group and a hydroxyl group. The properties of alcohols and phenols are primarily due to the hydroxyl group. The nature of alkyl and aryl groups simply modify these properties. Alcohol react both as nucleophiles and electrophiles whereas in phenols, the reactions that take place on the aromatic ring are electrophilic subtitution reactions.
Few compounds are given below (A to D). Arrange them in the increasing
order of their boiling points.
(A) Pentan-1-ol
(B) n-Butane
(C) Pentan-1-al
(D) Ethoxyethane
Choose the correct answer from the options given below :

Match List I with List II

List 1	List 2
A. Lanthanum	I. \(+3,+4\)
B. Praseodymium	I. +3
C. Neodymium	III. \(+2,+3,+4\)
D. Samarium	IV. \(+2,+3\)

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Glycoside linkage is the ether bond present in between two:

The function \(f: Z \rightarrow Z\) defined by \(f(x)=x^2+x\), where \(Z\) is the set of integers, is: