List of practice Questions

Animals possess nerve networks or nervous systems to respond to their environment. But the single called Amoeba does not possesses any nerve cell, so, how it come to know whether a particle it encounters is a grain of sand and not its dinner ?
Enzyme often have additional parts in their structures that are made up of molecules other than proteins. When this additional chemical part is an organic molecule, it is called
Genetically engineered bovine $(bST)$, sometimes called $rbST$ (recombinant bovine somatotropin) or $rbGH$ (recombinant bovine growth hormone) are used in the
This method of finding a gene is used when researchers know very little about the gene they are trying to find. This process results in a complete gene library: a collection of copies of DNA fragments that represent the entire genome of an organism.
A gamete may carry either of the traits but not both. This is Mendel?? second law or law of independent assortment.
A charge, whether stationary or in motion produces a magnetic field around it. Moving charges produce only electric field in the surrounding space.
A compound with delocalised electrons is more stable than that compound would be if all its electrons were localised. The extra stability, a compound gains as a result of having delocalised electrons, is called delocalisation energy.
$1.575\, g\, H _{2} C _{2} O _{4} \cdot 2 H _{2} O$ in $250 \,mL$ solution makes it $0.1 \,N$. $H _{2} C _{2} O _{4} \cdot 2 H _{2} O$ is a dihydrate organic acid.
Darwin's finches provide excellent evidence in favour of organic evolution. These are related to which of the following evidences?
In a step up transformer the turn ratio is 1 : 10. A resistance of $ 200\,\Omega $ connected across the secondary is drawing a current of 0.5 A. What is the primary voltage and current?
If the equivalent capacitance between A and B is $ \text{1}\text{F,} $ then the value of C will be
If the input is given between A and C, then the output at the ends of R will be
The charge on a particle Y is double the charge on particle X. These two particles X and Y after being accelerated through the same potential difference enter a region of uniform magnetic field and describe circular paths of radii R1 and R2 respectively. The ratio of the mass of X to that of Y is
An electric dipole is placed along the x-axis at the origin 0. A point P is at a distance of 20 cm from this origin such that OP makes an angle $ \text{/3} $ with the x-axis. If the electric field at P makes an angle $ \theta $ with the x-axis, the value of $ \theta $ would be
Two plane mirrors are inclined to each other at angle $ 60{}^\circ $ . Ray incident on first mirror parallel to the second mirror becomes parallel to first mirror after reflection. Angle of deviation is
A wire of length $l$ and mass m is bent in the form of a semicircle. The gravitational field intensity at the centre of semicircle is
A thin uniform rod of length $l$ and mass $m$ is swinging freely about a horizontal axis passing through its end. Its maximum angular speed is $\omega$. Its centre of mass rises to a maximum height of
A short linear object, of length $l$, lies along the axis of a concave mirror, of focal length $f$, at a distance $d$ from the pole of the mirror. The size of the image is then (nearly)
Which one of the following impurities present in colloidal solution cannot be remove by electrodialysis?
Which one of the following is correct pairing of a body part with the kind of muscle tissue present in it?
When propionic acid is treated with aqueous sodium bicarbonate, $ CO_{2}$ is liberated. The $C$ of $ CO_{2}$ comes from
When sucrose is heated with conc. $ HNO_{3},$ the product formed is
When a stationary wave is formed then its frequency is
Lithium metal crystallizes in a body centred cubic crystal. If the length of the side of the unit cell of lithium is $351\, pm,$ the atomic radius of the lithium will be
In a pure inductive circuit, current