Plants capture only ______ of the photosynthetically active radiation (PAR) and this small amount of energy sustains the entire living world.

Match List-I with List-II

List-I (Barriers)	List-II (Examples)
(A) Physical barrier	(I) Acid in the stomach
(B) Cellular barrier	(II) Interferons
(C) Cytokine barrier	(III) Leucocytes in our body
(D) Physiological barrier	(IV) Skin on our body

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Arrange the following steps of retrovirus replication sequentially.
A. Production of viral DNA by reverse transcriptase
B. Introduction of viral RNA in host cell
C. Production of new viral RNA by host cell
D. Incorporation of viral DNA into host genome
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Read the following paragraph and answer the given questions.
Repeated amplification is achieved by the use of a thermostable DNA polymerase (isolated from a bacterium, Thermus aquaticus), which remain active during the high temperature induced denaturation of double stranded DNA. The separated DNA fragments can be visualised only after staining the DNA with a compound known as ethidium bromide followed by exposure to UV radiation. The separated bands of DNA are cut out from the agarose gel and extracted from the gel piece. The convention for naming these enzymes is the first letter of the name comes from the genus and the second two letters come from the species of the prokaryotic cell from which they were isolated, e.g., EcoRI comes from Escherichia coli RY 13. In EcoRI, the letter 'R' is derived from the name of strain. Roman numbers following the names indicate the order in which the enzymes were isolated from that strain of bacteria. Stanley Cohen and Herbert Boyer accomplished this in 1972 by isolating the antibiotic resistance gene by cutting out a piece of DNA from a plasmid which was responsible for conferring antibiotic resistance. Since the DNA is enclosed within the membranes, we have to break the cell open to release DNA, RNA, protein, polysaccharides etc. The RNA can be removed by treatment with ribonuclease whereas proteins can be removed by treatment with protease. Other molecules can be removed by appropriate treatments and purified DNA ultimately precipitates out after the addition of chilled ethanol.

In agarose gel electrophoresis, the separated DNA fragments can be visualized with the help of compound known as:

Identify the incorrect statement about genetically modified plants.

Drosophila melanogaster was chosen by Thomas Hunt Morgan for the experimental verification of the chromosomal theory of inheritance because of its:
(A) Many types of hereditary variations visible under a low-powered microscope
(B) Large number of progeny in single mating
(C) Clear differentiation of sexes
(D) Life cycle of about 4 weeks
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The experimental verification of the chromosomal theory of inheritance was given by

The interaction between two species where one species is benefitted and the other is neither benefitted nor harmed is known as:

The entities which donot dissociate into simple ions are :
A. \([Fe(CN)_6]^{4-}\)
B. \(KCl \cdot MgCl_2 \cdot 6H_2O\)
C. \(K_4[Fe(CN)_6]\)
D. \(KAl(SO_4)_2 \cdot 12H_2O\)
E. \(FeSO_4 \cdot (NH_4)_2SO_4 \cdot 6H_2O\)
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In a country, at any time, the population has the same number of youngs and mature ones. What type of growth does it reflect?

Match List-I with List-II 

List-I	List-II
(A) Williamson's synthesis.	\((I)\) \(C _6 H _5 Cl + NaOH \xrightarrow[\text { High pressure }]{350^{\circ} C }\)
(B) Reimer Tiemann reaction.	\((II)\) \(C _6 H _5 OH + C _6 H _5 COCl \xrightarrow{\text { aq. } NaOH }\)
(C) Dow's process	\((II)I\) \(CH_3 CH_2 ONa+CH_3 Cl \xrightarrow{\text { heat }}\)
(D) Schotten Baumann reaction	\((IV)\) \(C _6 H _5 OH + CHCl _3+ NaOH \xrightarrow{\text { heat }}\)

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Which of the following does not belong to the first transition series ?

The value of the definite integral \(I=\int_{-1}^1 \frac{1}{1+\sqrt{e^x}} d x\) is :