List of practice Questions

Golden rice is a transgenic crop of the future with the following improved trait:

Prolonged liberal irrigation of agricultural fields is likely to create the problem of

Three crops that contribute maximum to global food grain production are :

The name of Norman Borlaug is associated with :

Which one of the following represents an ovule, where the embryo sac becomes horseshoe shaped and the funiculus and micropyle are close to each other?

In which one pair both the plants can be vegetatively propagated by leaf pieces ?

The ability of the Venus flytrap to capture insects is due to:

A reaction occurs spontaneously if:

Equilibrium constants K₁ and K₂ for the following equilibria: NO_(g)+\(\bigg(\frac{1}{2}\bigg)\)O₂ \(^{K_1}_\rightleftharpoons\) NO₂(g) and 2NO_2(g) \(^{K_2}_\rightleftharpoons\) 2NO_(g)+O_2(g) are related as:

The absolute enthalpy of neutralisation of the reaction: MgO_(s)+2HCl_(aq) \(\rightarrow\) MgCl_2(aq)+H₂O (l) will be:

A ball is thrown vertically upward. It has a speed of 10m/s when it has reached one half of its maximum height. How high does the ball rise?(Taking g=10 m/s²)

There exists a close association between the alga and the fungus within a lichen. The fungus

During transcription holoenzyme RNA polymerase binds to a DNA sequence and the DNA assumes a saddle like structure at that point. What is that sequence called?

Two cross - sections of stem and root appear simple, when viewed by naked eye. But under microscope, they can be differentiated by

A tuning fork arrangement (pair) produces 4 beats/sec with one fork of frequency 288 .cps. A little wax is placed on the unknown fork and it then produces 2 beats/sec. The frequency of the unknown folk is:

In the nuclear reaction, ${ }_{72} X^{180} {->[-\alpha]} Y {->[-\beta]} Z {->[-\alpha]} A {->[-\gamma]} P$ the atomic mass and atomic number of $P$ are, respectively

Which functional group participates in disulphide bond formation in proteins?

Which one of the following is expected to exhibit optical isomerism? (en = ethylenediamine)

The displacement x of a particle varies with time t as $x = ae^{-\alpha t}+be^{\beta t}$ where a, b, $\alpha$ and $\beta$ are positive constants. The velocity of the particle will

If the magnetic dipole moment of an atom of diamagnetic material, paramagnetic material and ferromagnetic material are denoted ny $\mu_d, \mu_p$ and $\mu_f$ respectively, then

Escape velocity for 'a projectile at Earth's surface is v,. A body is projected from earth's surface with velocity $2v_e$. The velocity of the body when it is at infinite distance from the centre of the Earth is

Glycerol is an alcohol which can be classified as

The boiling point of water decreases at high altitudes because

For protecting a sensitive equipment from external magnetic field, it should be

If the length of rod $A$ is $ 3.25\pm 0.01\,cm $ and that of $B$ is $ 4.19\pm 0.01\,cm, $ then the rod $B$ is longer than rod $A$ by