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Taq polymerase is used in the polymerase chain reaction because:
(1) It replicates DNA faster than other enzymes
(2) It is the only enzyme that can replicate DNA invitro
(3) It does not require RNA primer to function
(4) It is thermostable   

The hot spots of biodiversity conservation are characterized by:
1. High endemicity and high threat of extinction
2. Low endemicity and high threat of extinction
3. High endemicity and low threat of extinction
4. Low endemicity and low threat of extinction

The electronic configuration of a transition element X in +3 Oxidation state is [Ar]3d⁵.
The atomic number of X is :
1. 25
2. 26
3. 27
4. 24

Which acid deravative is most reactive towards nucleophilic substitution reaction?
1. CH₃COCl
2. (CH₃CO)₂O
3. CH₃COOC₂H₅
4. CH₃CONH₂

The binding energy per nucleon in deuterium and helium nuclei are $1.1 \mathrm{MeV}$ and $7.0 \mathrm{MeV},$ respectively. When two deuterium nuclei fuse to form a helium nucleus, the energy released in the fusion is
1.  47.12 MeV
2.  34.4 MeV
3.  11.8 MeV
4.  23.6 MeV

Two coils have a mutual inductance of 5 mH. Current changes in the first coil according to the equation I = $I_0$cos wt, where $I_0$ = 10 A and $\mathrm{\omega } = 100\mathrm{\pi }$ rad/s. Maximum value of e.m.f. induced in the second coil is
1.  5$\pi$ volt
2.   2$\pi$ volt
3.  4$\pi$ volt
4.  $\pi$ volt