List of practice Questions

Fermentation by yeast is due to

Cohesion Tension theory is related with

Biotic components of an ecosystem include

The fertilization in which male gametes are carried through pollen tube is known as

Who discovered jumping gene in maize?

Binomial system of nomenclature was given by

Mendel? 1st law is

Melvin Calvin worked on

Bengal famine was caused by

Which of the following do not evolve $O_2$?

Which of the following compound is used as antiknock compound ?

Which of the following is not an antihistamine?

Bacterial conjugation was first shown by

At a time, maximum amount of urea will be present in

At what speed, the velocity head of water is equal to pressure head of $40\, cm$ of Hg?

Terms cistron, mucon and recon were coined by

Which of the following is not of biotic origin?

A vessel contains oil (density $0.8 \, \, g \text{m/cm}^{3}$ ) over mercury (density $= 13.6 \, \, g \text{m/cm}^{3}$ ). A homogeneous sphere floats with half of its volume immersed in mercury and the other half in oil. The density of the material of the sphere in $g \text{m/cm}^{3}$ is

A vertebra with posteriorly concave and anteriorly convex centrum is called

A man throws balls with same speed vertically upwards one after the other at an interval of $2 \,s$. What should be the speed of throw so that more than two balls are in the sky at any time ?

Liquid of density $\rho$ flows along a horizontal pipe of uniform area of cross section $a$ with a velocity $v$ through a right angled bend. What force should be applied to the bend to hold it in equilibrium?

A car is moving on a circular road of diameter $50\, m$ with a speed of $5m\, s^{-1}$. It is suddenly accelerated at a rate of $1 \,ms^{-2}$. If the mas s of the car is $500 \,kg$, then the net force acting on the car is

A train of weight $10^7\, N$ is running on a level track with uniform speed of $36 \,km \,h^{-1}$. The frictional force is $0.5\, kg\, f$ per quintal. If $g = 10\, ms^{- 2}$, power

A stretched string of length $l$ fixed at both ends can sustain stationary waves of wavelength $\lambda$ such that ($n$ is an integer)

A special cell called heterocyst is found in