List of practice Questions

Cyclin protein is required for cell cycle. Which other molecule is essential for completion of cell cycle ?

Stomata open in the daytime due to

"Bt" toxin is

Which of the following statements is true ?

Which is the most distinct character of fishes ?

Blastula of frog is:

The outermost layer of exine of a pollen grain is made up of

Benedict's solution is not reduced by

Based on cellular mechanisms there are two major types of regeneration found in the animals. Which one of the following is the correct example of the type mentioned?

Assuming earth to be sphere of uniform density what is the value of acceleration due to gravity at a point $100\, km$ below the earth surface (Given $R=6380\,\times 10^{3}\,m$)

The clouds in sky generally appear to be whitish. Diffraction due to clouds is efficient in equal measure at all wavelengths.

Specific gravity of a fluid is a dimensionless quantity. It is the ratio of density of fluid to the density of water.

$SiF_6^{2-}$ is known but $SiCl_6^{2-}$ is not. Size of fluorine is small and its lone pair of electrons interacts with d-orbitals of $Si$ strongly.

Reaction of $SO_2$ and $H_2S$ in the presence of $Fe_2O_3$ catalyst gives elemental sulphur. $SO_2$ is a reducing agent.

Rates of nitration of benzene and hexadeuterobenzene are different. $C - H$ bond is stronger than $C - D$ bond.

Ozone is a powerful oxidising agent in comparison to $O_2$ . Ozone is diamagnetic but $O_2$ is paramagnetic.

In humans, the gamete contributed by the male determines whether the child produced will be male or female. Sex in humans is a polygenic trait depending upon a cumulative effect of some genes on $X$-chromosome and some on $Y$-chromosome.

First ionisation energy for nitrogen is lower than oxygen. Across a period effective nuclear charge decreases.

Cyclopentadienyl anion is much more stable than allyl anion. Cyclopentadienyl anion is aromatic in character.

Area of the greatest rectangle that can be inscribed in the ellipse $\frac{x^{2}}{a^{2}}+\frac{y^{2}}{b^{2}}=1$ is :

The family containing mustard and its main characters are

Three of the following statements regarding cell organelles are correct while one is wrong. Which one is wrong?

In which one of the following would you expect to find glyoxysomes ?

Which one of the following four secretions is correctly matched with its source, target and nature of action?

Given below is a pedigree chart showing the inheritance of a certain sex-linked trait in humans. The trait traced in the above pedigree chart is