A magnetic substance has a susceptibility \( - 0.05 \) at 300 K. The magnetic susceptibility at 600 K is :

A moving coil galvanometer has 100 equal divisions. Its current sensitivity is 20 divisions per mA and voltage sensitivity is 4 divisions per mV. To convert it into a voltmeter in which each division reads 1 V, the resistance needed to be connected in series with the coil will be :

The speed of light in a material medium is given by :

In a single slit diffraction experiment, first minima for \( \lambda_1 = 600 \, \text{nm} \) coincides with first maxima for wavelength \( \lambda_2 \). The value of \( \lambda_2 \) is

The light from a point source placed in air is incident on a convex spherical glass surface of radius of curvature 30 cm.
The refractive index of the glass is 1.5. The distance of light source from the glass surface is 120 cm. The distance of the image formed from the glass surface is

Match List-I with List-II

List-I (EM wave)	List-II (Production)
(A) Light	(I) Klystron valve or magnetron valve
(B) X-rays	(II) Rapid acceleration/deceleration of electrons in aerials
(C) Microwave	(III) Electrons in atoms move from higher to lower energy level
(D) Radiowave	(IV) Inner shell electrons/ fast-moving electrons decelerated by metal target

Choose the correct answer from the options given below:

Which statements are true for X-ray ?
(A) The wavelength range of X-rays is about \( 10^{-8} \, \text{m} \) to \( 10^{-13} \, \text{m} \).
(B) X-rays can't affect a photographic film.
(C) X-rays can damage living tissues.
(D) We can generate X-rays by bombarding a metal target by high energy electrons.
(E) The wave length of X-rays is more then Microwave.
Choose the correct answer from the options given below :

If \(y=5 e^{2 x}+4 e^{3 x}\), then \(\frac{d^2 y}{d x^2}\) equals:

The conductivity of an ionic solution depends on:
A. The nature of the electrolyte added
B. The Volume of the container
C. The size of the ions and their solvation
D. Pressure
E. Concentration of the electrolytes
Choose the correct answer from the options given below :

Which of the following statements are true about phosphorous cycle?
A. There is no respiratory release of phosphorus in the atmosphere
B. The reservoir of phosphorus is rock
C. There are large atmospheric inputs of phosphorus through rainfall
D. The gaseous exchange of phosphorus between organisms and environment is negligible
Choose the correct answer from the options given below:

The integral \(I=\int \frac{e^x}{1-e^{2 x}} d x\) is equal to :

According to Bohr's Model :
(A) The radius of the orbiting electron is directly proportional to \({'n'. } \)
(B) The speedof the orbiting electron is directly proportional to \(\frac{1}{n} \)
(C) The magnitude of the total energy of the orbiting electron is directly proportional to \(\frac{1}{n^2} \)
(D) The radius of the orbiting electron is directly proportional to \( =n^2 \)
Correct options :

There are two kinds of nucleases - exonucleases and endonucleases. Exonucleases remove nucleotides from the ends of the DNA whereas, endonucleases make cuts at specific positions within the DNA. The cutting of DNA by restriction endonucleases results in the fragments of DNA. These fragments can be separated by a technique known as gel electrophoresis. Since DNA fragments are negatively charged molecules they can be separated by forcing them to move towards the anode under an electric field through a medium/matrix. Small volume cultures cannot yield appreciable quantities of products. To produce in large quantities, the development of bioreactors, where large volumes (100 - 1000 litres) of culture can be processed, was required. Thus, bioreactors can be thought of as vessels in which raw materials are biologically converted into specific products, individual enzymes, etc., using microbial plant, animal or human cells. PCR stands for Polymerase Chain Reaction. In this reaction, multiple copies of the gene (or DNA) of interest are synthesised in vitro using two sets of primers (small chemically synthesised oligonucleotides that are complementary to the regions of DNA) and the enzyme DNA polymerase.
Identify the correct enzyme to release the DNA from the fungal cells.?