Arrange the following steps regarding HIV infection in correct sequence
A. Viral RNA produced by the infected cell
B. Virus infects macrophages.
C. Viral DNA is produced by reverse transcriptase.
D. Viral RNA is introduced into the cell.
E. Viral DNA incorporates into the host genome.
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Which of the following cells secrete androgens?

Read the given passage and answer the following questions:
Secondary treatment or biological treatment: The primary effluent is passed into large tanks where air is pumped into it. This allows vigorous growth of aerobic microbes. While growing, these microbes consume the major part of the organic matter in the effluent. This significantly change the BOD (biochemical oxygen demand) of the effluent. The effluent in then passed into a tank a small part of the sludge is pumped back into the aeration tank to serve as the inoculum. The remaining major part of the sludge is pumped into large tanks called sludge digesters. Here, other kinds of bacteria grow anaerobically in the sludge. The biogas produced can be used source of energy as it is inflammable. The effluent from the secondary treatment plant is generally released into natural water bodies like rivers and streams.
Steps in primary treatment does not include:

Under Ganga Action and Yamuna Action plans, it is proposed to

Cryopreservation technique used for the conservation of threatened animals and plants is:

Arrange the given organs in correct sequence which are involved in life cycle of Plasmodium.
(A) Gut of mosquito
(B) Salivary gland of mosquito
(C) Liver of man
(D) Blood of man
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Match List-l with List-ll

List-l (Microorganisms)	List-II (Commercial Uses)
(A) Lactobacillus	(I) Use for the production of butyric acid
(B) Saccharomyces cerevisiae	(II) Use for production of swiss cheese
(C) Propionibacterium sharmanii	(III) Use for making bread
(D) Clostridium butylicum	(IV) Improves nutritional quality of milk by increasing vitamin B12

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Which of the following show Pleiotropism?

\(CH_3CH_2OH \xrightarrow[413\ K]{H_2SO_4}\) A. Identify "A" and mention the name of mechanism through which it is formed?

Answer the question on the basis of passage given below:
Aldehydes are generally more reactive than ketones in nucleophilic addition reactions due to steric and electronic reasons. Sterically, the presence of two relatively large substituents in ketones hinders the approach of nucleophile to carbonyl carbon more than aldehydes having only one such substituent Electronically aldehydes are more reactive than ketones because two alkyl groups reduce the elctrophilicity of the carbonyl more effectively than in former.
For preparation of phenylethanoic acid from benzyl alcohol, reagents required are
A. HBr
B. \(CO _2\)
C. \(K C N\)
D. \(\Delta / H_3 O^{+}\)
E. \(AgNO _3\)
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Two point charges, \( q_1 = 4\mu C \) and \( q_2 = -3\mu C \) (with no external field) are placed at (\(-6 \, cm, 0, 0\)) and (\(6 \, cm, 0, 0\)), respectively. The amount of work required to separate the two charges infinitely away from each other will be

At what rate will the present value of a perpetuity of Rs.1000 payable at the end of each quarter be Rs.50000?

When chlorine gas is passed through a hot solution of NaOH, a disproportionation reaction occurs. The zero oxidation state of chlorine changes to:
(A) 0 to +5
(B) 0 to -1
(C) 0 to +3
(D) 0 to +1
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