List of practice Questions

The DNA fragments separated on an agarose gel can be visualised after staining with

Functional megaspore in an angiosperm develops into

The semi-major axis of the orbit of Saturn is approximately nine times that of Earth. The time period of revolution of Saturn is approximately equal to

If vector $\vec{r}$ with d.c.s. $l, m, n$ is equally inclined to the co-ordinate axes, then the total number of such vectors is

The value of $\cos^{-1} \left(\cot\left(\frac{\pi}{2}\right)\right) + \cos^{-1} \left(\sin\left(\frac{2\pi}{3}\right)\right) $ is

The equation of the plane through $(-1, 1 , 2 ) $ whose normal makes equal acute angles with co-ordinate axes is

A baby boy aged two years is admitted to play school and passes through a dental check - up. The dentist observed that the boy had twenty teeth. Which teeth were absent?

A decrease in blood pressure / volume will not cause the release of :

Which cells of "Crypts of Lieberkuhn" secrete antibacterial lysozyme ?

Functional megaspore in an angiosperm develops into ?

Myelin sheath is produced by

Attractants and rewards are required for

Receptor sites for neurotransmitters are present on :

Coconut fruit is a :

Adult human RBCs are enucleated. Which of the following statement(s) is/are most appropriate explanation for this feature ? (a) They do not need to reproduce (b) They are somatic cells (c) They do not metabolize (d) All their internal space is available for oxygen

Of the following, which is the product formed when cyclohexanone undergoes aldol condensation followed by heating?

The species, having bond angles of 120° is

If molality of the dilute solution is doubled, the value of molal depression constant (K_f) will be

Which one is the most acidic compound?

It is because of inability of ns² electrons of the valence shell to participate in bonding that

Predict the correct intermediate and product in the following reaction.

Which one of the following statements is not correct?

Which one is the wrong statement?

A gas is allowed to expand in a well insulated container against a constant external pressure of 2.5 atm from an initial volume of 2.50 L to a final volume of 4.50 L. The change in internal energy △U of the gas in joules will be

Consider the reactions :

Identify A,X,Y and Z.