List of practice Questions

The weight $W$ of a certain stock of fish is given by $W= nw,$ where n is the size of stock and w is the average weight of a fish. If $n$ and $w$ change with time $t$ as $n=2t^{2}+3$ and $w=t^{2}-t+2,$ then the rate of change of $W$ with respect to $t$ at $t = 1$ is

The velocity of certain ions that pass undeflected through crossed electric field $E = 7.7 k\, V/m$ and magnetic field $B = 0.14\, T$ is

The two organisms which breathe only through their moist skin are

The total number of ways in which $5$ balls of different colours can be distributed among $3$ persons so that each person gets at least one ball is

The total number of biodiversity hotspots in the world are

The term �biosystematics� was coined by

The stages between larval moults in an insects are called

The $SI$ unit of intensity of wave is

The radius of gyration of body depends upon

The range of the function $f \left(x\right)=\frac{x}{1+\left|x\right|}, x\,\in\,R,$ is

The pyramid of biomass in sea is

The graph of an object�s motion (along the x-axis) is shown in the figure. The instantaneous velocity of the object at points $A$ and $B$ are $v_A$ and $v_B$ respectively. Then

The general solution of the differential equation $\frac{dy}{dx}+\frac{2}{x}y=x^{2}$ is

The functional unit of DNA molecule that codes for particular gene product is

The equation of the circle passing through the point (1,2) and through the points of intersection of $x^2+y^2-4x-6y-21 = 0$ and $3x+4y+5 = 0$ is given by

The equation of a plane containing the line $\frac{x+1}{-3} = \frac{y-3}{2} = \frac{z+2}{1}$ and the point (0,7, - 7) is

The energy currency of the cell is

The electrolyte used in Leclanche cell is

The correct order of ligands in the spectrochemical series is

Sickle cell anaemia is caused by substitution of

Sexual reproduction in eubacteria takes place by

Select the correct statement regarding protein synthesis

Saccharin, an artificial sweetner, is manufactured from

Root mean square speed of the molecules of ideal gas is $v$. If pressure is increased two times at constant temperature, then the rms speed will become

Radioactive isotope of hydrogen is