List of practice Questions

$DNA$ cannot pass through a cell membrane as

$DNA$ is a polymer of nucleotides which are linked to each other by $3'-5'$ phosphodiester bond. To prevent polymerisation of nucleotides, which of the following modifications would you choose?

Distance between the center of two stars is 10a. the masses of these stars are m and 16M and their radii a and 2a respectively. A body of mass m is fired straight from the surface of the smller star towards the surface of the smaller star. What should be its minimum initial speed to reach the surface of the smaller star ?

Distance of distinct vision is 25 cm. The focal length of the convex lens is 5 cm. It can act as a magnifier of magnifying power:

Diuresis is a condition characterized by

$ \displaystyle\lim_{x \to \frac{\pi}{2}} \frac{1 - \sin \, x}{\cos \, x}$ is equal to

$\displaystyle\lim_{x\to \frac{\pi}{2}} \frac{\cos \, x}{ x - \frac{\pi}{2}}$ equals:

$\displaystyle\lim_{x \to \infty} \frac{ (2x -3)(3x -4)}{(4x - 5)(5x - 6)}$ is equal to:

$\displaystyle\lim_{x \to 0}\left[\frac{sin\left[x-3\right]}{\left[x-3\right]}\right]$, where [ . ] denotes greatest integer function is

$\displaystyle \lim_{x \to 1}$$\left[\left(\frac{4x}{x^{2}-x^{-1}}-\frac{1-3x+x^{2}}{1-x^{3}}\right)^{-1}+3\left(\frac{x^{4}-1}{x^{3}-x^{-1}}\right)\right]$ is

$\displaystyle \lim_{n \to \infty}$$\left(\frac{1}{n^{2}}+\frac{3}{n^{2}}+\frac{5}{n^{2}}+.....+\frac{2n+1}{n^{2}}\right)$ is equal to

$\displaystyle \lim_{x \to 0}$ $\frac{1-cos\,mx}{1-cos\,nx}=$

$\displaystyle \lim_{x \to 0}$ $\left(cos\,x+sin\,x\right)^{\frac{1}{x}}$ equals

Dispersive power of the material of a prism is 0.0221. If the deviation produced by it for yellow colour is 38, then the angular dispersion between red and violet colours is

Displacement time graph cannot be

$\displaystyle \lim_{h \to 0}$ $\frac{\left(a+h^{2}\right)sin\left(a+h\right)-a^{2}\,sin\,a}{h}=$

Discontinuous synthesis of $DNA$ occurs in one strand, because

Diseases are broadly grouped into infectious and noninfectious diseases. In the list given below, identify the infectious diseases. (i) Cancer (ii) Influenza (iii) Allergy (iv) Small pox

Dispersive power depends on:

Diploblastic and triploblastic are terms that describe

Diplotene stage of prophase-$I$ is characterised by

Dimensions of relative density is

Dimensions of solar constant are