List of practice Questions

Obliquely placed ovary and swollen placentae occur in

The portion of enlarged axis above cotyledons is

Areolar tissue connects

Anti-Markownikoff addition of $HBr$ is not observed in

An object is placed at a distance of $10\, cm$ from co-axial combination of two lenses $A$ and $B$ contact. The combination forms a real image three times the size of the object. If lens $B$ concave with a focal length of $30\,cm$. The nature and focal length of lens $A$ is

An infinitely long hollow conducting cylinder with inner radius $R/2$ and outer radius $R$ carries a uniform current density along its length. The magnitude of the magnetic field, as a function of the radial distance $r$ from the axis is best represented by

Amplification of gene of interest by using DNA polymerase may go upto

Among the following, which is the least stable conformation of cyclohexane?

Argentaffin cells occur in

Alpha particles of kinetic energy $ 7.7 \,MeV $ are being scattered by the nucleus of gold which has $ 79 $ electrons. The distance of closest approach of the alpha particles is (Take $ \frac{1}{4\,\pi\, \varepsilon_{0} = 9 \times 10^{9} \, MKS} )$

Father of Indian Ecology is

In domestic sewage, suspended solids, colloidal and dissolved materials constitute

Xenograft is a graft

If haemoglobins (Hbs) of a normal and a sickle cell patient are subjected to electrophoresis, they will show

Mammal like reptiles evolved during

Basic principle for developing transgenic plants and animals is to introduce the gene of interest into nucleus of

Which one of the following is not included under in-situ conservation ?

A thin uniform rod, pivoted at O, is rotating in the horizontal plane with constant angular speed $\omega$, as shown in the figure. At time t = 0, a small insect starts from O and moves with constant speed v with respect to the rod towards the other end. It reaches the end of the rod at t = T and stops. The angular speed of the system remains $\omega$ throughout. The magnitude of the torque $|\tau|$ on the system about O, as a function of time is best represented by which plot?

A solid has a structure in which, atoms of $ W,O $ and $Na$ are located respectively at the comers, centre of edges and at the centre of the cubic lattice. The compound is

Tangents are drawn to the hyperbola $\frac{x^2}{9}-\frac{y^2}{4}=1$, parallel to the straight line $2x-y=1.$ The points of contacts of the tangents on the hyperbola are

If $X$ and $Y$ are two events such that $P (X | Y )=\frac{1}{2}, P(X | Y)=\frac{1}{3.} \, and \, P(X \cap Y)\frac{1}{6}$ Then, which of the following is/are correct?

Four fair dice $D_1, D_2, D_3$ and $D_4$ each having six faces numbered $1, 2, 3, 4, 5$ and $6$ are rolled simultaneously. The probability that D$_4$ shows a number appearing on one of $D_1, D_2$ and $D_3$, is

The point $P$ is the intersection of the straight line joining the points $Q(2, 3, 5)$ and $R (1, - 1, 4)$ with the plane $5x - 4y - z = 1$. If $S$ is the foot of the perpendicular drawn from the point $T (2,1, 4)$ to $QR$, then the length of the line segment $PS$ is

The equation of a plane passing through the line of intersection of the planes $x + 2y + 3z = 2$ and $x - y + z = 3$ and at a distance $\frac{2}{\sqrt 3}$ from the point $(3,1, -1)$ is

If $\overrightarrow{a} $ and $ \overrightarrow{b}$ are vectors such that $| \overrightarrow{a}+\overrightarrow{b} |=\sqrt{29}$ and $\overrightarrow{a}\times(2\widehat{i}+3\widehat{j}+4\widehat{k})=(2\widehat{i}+3\widehat{j}+4\widehat{k})\times\overrightarrow{b},$ then a possible value of $ (\overrightarrow{a}+\overrightarrow{b})(-7\widehat{i}+2\widehat{j}+3\widehat{k} is $