ICBN stands for

The living organisms can be unexceptionally distinguished from the non-living things on the basis of their ability for

Which one of the following statements about mycoplasma is wrong?

Which one of the following is a slime mould?

Which pair of the following belongs to basidiomycetes?

In gymnosperms, the pollen chamber represents

Spore dissemination in some liverworts is added by

In the prothallus of a vascular cryptogam, the antherozoids and eggs mature at different times. As a result

Flagellated male gametes are present in all the three of which one of the following sets?

If you are asked to classify the various algae into distinct groups, which of the following characters you should choose

Which one of the following is a matching pair of body feature and the animal possessing it?

Which of the following pairs are correctly matched? .tg {border-collapse:collapse;border-spacing:0;border:none;} .tg t

What is common between parrot, platypus and kangaroo?

What is true about Nereis, scorpion, cockroach and silver fish?

Which of the following is a flowering plant with nodules containing filamentous nitrogen-fixing micro-organism?

About 98 percent of the mas of every living organism is composed of just six elements including carbon, hydrogen, nitrog

Two cells A and B are contiguous. Cell A has osmotic pressure 10 atm, turgor pressure 7 atm and diffusion pressure defic

Which one of the following elements is not an essential micronutrient for plant growth?

A plant requires magnesium for

The first acceptor of electrons from an excited chlorophyll molecule of photosystem II is

In the leaves of C4 plants, malic acid formation during CO2 fixation occurs in the cells of

All enzymes of TCA cycle are located in the mitochondrial matrix except one which is located in inner mitochondrial memb

The overall goal of glycolysis, Krebs' cycle and the electron transport system is the formation of

The wavelength of light absorbed by Pr form of phytochrome is

Which one of the following pairs, is not correctly matched?

Opening of floral buds into flowers, is a type of

Which one of the following is a fat-soluble vitamin and its related deficiency diseade?

A drop of each of the following, is placed separately on four slides. Which of them will not coagulate?

A person who is on a long hunger strike and is surviving only on water, will have

Which one of the following items gives its correct total number?

In human body, which one of the following is anatomically correct?

During the transmission of nerve impulse through a nerve fibre, the potential on the inner side of the plasma membrane h

Bowman's glands are located in the

Feeling the tremors of an earthquake a scared resident of seventh floor of a multistoryed building starts climbing down

A person is having problems with calcium and phosphorus metabolism in his body. Which one of the following glands may no

Male gametes in angiosperms are formed by the division of

Two plants can be conclusively said to belong to the same species if they

Which one of the following is surrounded by a callose wall?

In the human female, menstruation can be deferred by the administration of:-

Which part of ovary in mammals acts as an endocrine gland after ovulation ?

A human male produces sperms with the genotypes AB, Ab, AB, and ab pertaining to two diallelic characters in equal propo

In pea plants, yellow seeds are dominant to green. If a heterozygous yellow seeded plant is crossed with a green seeded

Inheritance of skin colour in humans is an example of:-

A common test to find the genotype of a hybrid is by:-

In the hexaploid wheat, the haploid(n) and basic(x) numbers of chromosomes are :

The concept of chemical evolution is based on-

Adaptive radiation refers to:-

The finches of Galapogas islands provide an evidence in favour of-

When two species of different genealogy come to resemble each other as a result of adaptation, the phenomenon is termed:

Increased asthmatic attacks in certain seasons are related to:

If you suspect major deficiency of antibodies in a person, to which of the following would you look for confirmatory evi

Lysozyme that is present in perspiration, saliva and tears, destroys:

Compared to a bull a bullok is docile because of:-

Which one of the following is a viral disease of poultry ?

In maize, hybrid vigour is exploited by:-

In cloning of cattle a fertilized egg is taken out of the mother's womb and:-

Probiotics are-

Which one of the following pairs is wrongly matched ?

A genetically engineered micro-organism used successfully in bioremediation of oil spills is a species of-

Geometric representation of age structure is a characteristic of :-

The population of an insect species shows an explosive increase in numbers during rainy season followed by its disappear

If the mean and the median pertaining to a certain character of a population are of the same value, the following is mos

A high density of elephant population in an area can result in :-

Which one of the following ecosystem types has the highest annual net primary productivity ?

Identify the odd combination of the habitat and the particular animal concerned :

Which one of the following pairs of organisms are exotic species introduced in India ?

One of endangered species of Indian medicinal plants is that of:-

In which one of the following the BOD (Biochemical Oxygen Demand) of sewage (S), distillery effluent (DE), paper mill ef

Which one of the following is not a bioindicator of water pollution ?

In a coal fired power plant electrostatic precipitators are installed to control emission of:-

Which one of the following statements is correct ?

Passage cells are thin-walled cells found in:-

For a critical study of secondary growth in plants, which one of the following pairs is suitable ?

Which one of the following pairs of structures distinguishes a nerve cell from other types of cell ?

In which one of the following preparations are you likely to come across cell junctions most frequently ?

Biological organization starts with:-

Which one of the following is not a constituent of cell membrane ?

Select the wrong statement from the following:

Which one of the following statements is correct?

An element, X has the following isotopic composition: 200X : 90%  199X : 8.0%  202X : 2.0% The weig

Consider the following sets of quantum numbers : .tg {border-collapse:collapse;border-spacing:0;border:none;} .tg td{

Identify the correct order of the size of the following :

Which one of the following ionic species has the greatest proton affinity to form stable compound ?

With which of the following electronic configuration an atom has the lowest ionisation enthalpy ?

In which of the following pairs, the two species are isostructural?

The correct order of C $$-$$ O bond length among CO, CO$${_3^{2 - }}$$, CO2 is

Consider the following reactions : (i) H+(aq) + OH$$-$$(aq) = H2O(l),  $$\Delta $$H = $$-$$ X1 kJ mol$$-

Given that bond energies of H $$-$$ H and Cl $$-$$ Cl are 430 kJ mol$$-$$1 and 240 kJ mol$$-$$1 respectively and $$\Delt

The equilibrium constants of the following are N2 + 3H2 $$\rightleftharpoons$$ 2NH3;     K1 N2

Calculate the pOH of a solution at 25oC that contains 1 $$ \times $$ 10$$-$$10 M of hydronium ions, i.e. H3O+.

A weak acid, HA, has a Ka of 1.00 $$ \times $$ 10$$-$$5. If 0.100 mol of this acid is dissolved in one litre of water, t

CH3 $$-$$ CHCl $$-$$ CH2 $$-$$ CH3 has a chiral centre. Which one of the following represents its R-configuration?

For (i) I$$-$$, (ii) Cl$$-$$, (iii) Br$$-$$, the increasing order of nucleophilicity would be

The order of decreasing reactivity towards an electrophilic reagent, for the following would be (i) benzene (ii) tolu

Which of the compound with molecular formula C5H10 yields acetone on ozonolysis?

Predict the product C obtained in the following reaction of 1-butyne.

If there is no rotation of plane polarised light by a compound in a specific solvent, through to be chiral, it may mean

In the reaction : Which of the following compounds will be formed?

The correct order of increasing thermal stability of K2CO3, MgCO3, CaCO3 and BeCO3 is

In which of the following the hydration energy is higher than the lattice energy?

Reduction of aldehydes and ketones into hydrocarbons using zinc amalgam and conc. HCl is called

The product formed in Aldol condensation is

Consider the following compounds The correct decreasing order of their reactivity towards hydrolysis is

Which of the following represents the correct order of the acidity in the given compounds ?

Which one of the following on treatment with 50% aqueous sodium hydroxide yields the corresponding alcohol and acid?

Which one of the following on reduction with lithium aluminium hydride yields a secondary amine?

Which of the following vitamins is water-soluble?

RNA and DNA are chiral molecules, their chirality is due to

Which one of the following polymers is prepared by condensation polymerisation?

The fraction of total volume occupied by the atoms present in a simple cube is

If NaCl is doped with 10$$-$$4 mol% of SrCl2, the concentration of cation vacancies will be (NA = 6.02 $$ \times $$ 1023

0.5 molal aqueous solution of a weak acid (HX) is 20% ionised. If Kf for water is 1.86 K kg mol$$-$$1, the lowering in f

Concentrated aqueous sulphuric acid is 98% H2SO4 by mass and has a density of 1.80 g mL$$-$$1. Volume of acid required t

The equilibrium constant of the reaction: Cu(s) + 2Ag+(aq) $$ \to $$ Cu2+(aq) + 2Ag(s); Eo = 0.46 V at 298 K is

The efficiency of a fuel cell is given by

If 60% of a first order reaction was completed in 60 minutes, 50% of the same reaction would be completed in approximate

In a first-order reaction A $$ \to $$ B, if k is rate constant and initial concentration of the reactant A is 0.5 M, the

The reaction of hydrogen and iodine monochloride is given as : H2(g) + 2ICl(g) $$ \to $$ 2HCl(g) + I2(g) This reaction

The Langmuir adsorption isotherm is deduced using the assumption

Which of the following oxidation states are the most characteristic for lead and tin respectively?

Which of the following anions is present in the chain structure of silicates?

Which one of the following orders correctly represents the increasing acid strengths of the given acids?

Which of the following statements, about the advantage of roasting of sulphide ore before reduction is not true?

Sulphide ores of metals are usually concentrated by froth floatation process. Which one of the following sulphide ores o

Which one of the following ions is the most stable in aqueous solution? (At. No. Ti = 22, V = 23, Cr = 24, Mn = 25)

Identify the incorrect statement among the following:

The d electron configurations of Cr2+, Mn2+, Fe2+ and Ni2+ are 3d4, 3d5, 3d6 and 3d8 respectively. Which one of the foll

Which of the following will give a pair of enantiomorphs? (en = NH2CH2CH2NH2)

Dimensions of resistance in an electrical circuit, in terms of dimension of mass M, of length L, of time T and of curre

A particle moving along x-axis has acceleration f, at time t, given by f = f0$$\left( {1 - {t \over T}} \right),$$ where

A car moves from X to Y with a uniform speed vu and returns to Y with a uniform speed vd. The average speed for this rou

The positions x of a particle with respect to time t along x-axis is given by x = 9t2 $$-$$ t3 where x is in metres and

$$\overrightarrow A $$ and $$\overrightarrow B $$ are two vectors and $$\theta $$ is the angle between them, if $$\left

A particle starting from the origin (0, 0) moves in a straight line in the (x, y) planes. Its coordinates at a later tim

A block B is pushed momentarily along a horizontaly surface with an initial velocity V. If  $$\mu $$  is the c

A vertical spring with force constant k is fixed on a table. A ball of mass m at a height h above the free upper end of

A uniform rod AB of length $$l$$ and mass m is free to rotate about point A. The rod is released from rest in the horizo

A particle of mass m moves in the XY plane with a velocity v along the straight line AB. If the angular momentum of the

A wheel has angular acceleration of 3.0 rad/sec2 and an initial angular speed of 2.00 rad/sec. In a time of 2 sec it has

Two satellites of earth, S1 and S2 are moving in the same orbit. The mass of S1 is four times the mass of S2. Which one

Assuming the sun to have a spherical outer surface of radius r, radiating like a black body at temperature toC, the powe

A black body is at 727oC. It emits energy at a rate which is proportional to

An engine has an efficiency of 1/6. When the temperature of sink is reduced by 62oC, its efficiency is doubled. Temperat

A particle executes simple harmonic oscillation with an amplitude $$a$$. The period of oscillation is T. The minimum tim

A mass of 2.0 kg is put on a flat pan attached to a vertical spring fixed on the ground as shown in the figure. The mass

The particle executing simple harmonic motion has a kinetic energy K0cos2$$\omega $$t. The maximum values of the potenti

The phase difference between the instantaneous velocity and acceleration of a particle executing simple harmonic motion

A hollow cylinder has a charge q coulomb within it. If $$f$$ is the electric flux in units of voltmeter associated with

Charges +q and $$-$$q are placed at points A and B respectively which are a distance 2L apart, C is the midnight between

Three point charges +q, $$-$$ 2q and + q are placed at points (x = 0, y = a, z = 0), (x = 0, y = 0, z = 0) and (x = $$a$

Two condensers, one of capacity C and other of capacity C/2 are connected to a V-volt battery, as shown in the figure. T

Three resistances, P, Q, R each of 2$$\Omega $$ and an unknown resistance S from the four arms of a Wheatstone bridge ci

The total power dissipated in watt in the circuit shown here is

Under the influence of a uniform magnetic field, a charged particle moves with constant speed v in a circle of radius R.

The resistance of an ammeter is 13 $$\Omega $$ and its scale is graduated for a current upto 100 amps. After an addition

Nickel shows ferromagnetic property at room temperature. If the temperature is increased beyond Curie temperature, then

A charged particle (charge q) is moving in a circle of radius R with uniform speed v. The associated magnetic moment $$\

The primary and secondary coils of a transformer have 50 and 1500 turns respectively. If the magnetic flux $$\phi $$ lin

What is the value of inductance L for which the current is maximum in a series LCR circuit with C = 10 $$\mu $$F and $$\

A transformer is used to light a 100 W and 110 V lamp from a 220 V mains. If the main current is 0.5 amp, the efficiency

The electric and magnetic field of an electromagnetic wave are

A small coin is resting on the bottom of a beaker filled with liquid . A ray of light from the coin travels upto the sur

The frequency of a light wave in a material is 2 $$ \times $$ 1014 Hz and wavelength is 5000 $$\mathop A\limits^ \circ

A 5 watt source emits monochromatic light of wavelength 5000 $$\mathop A\limits^ \circ $$. When placed 0.5 m away, it l

A beam of electron passes undeflected through mutually perpendicular electric and magnetic fields. If the electric field

Monochromatic light of frequency 6.0 $$ \times $$ 1014 Hz is produced by a laser. The power emitted is 2 $$ \times $$ 10

Two radioactive substances A and B have decay constants 5$$\lambda $$ and $$\lambda $$ respectively. At t = 0 they have

In a radioactive decay process, the negatively charged emitted $$\beta $$-particles are

In a mass spectrometer used for measuring the masses of ions, the ions are initially accelerated by an electric potentia

A nucleus $${}_Z^AX$$ has mass represented by M(A, Z). If Mp and Mn denote the mass of proton and neutron respectively a

If the nucleus $${}_{13}^{27}Al$$ has a nuclear radius of about 3.6 fm, them $${}_{32}^{125}Te$$ would have its radius a

The total energy of electron in the ground state of hydrogen atom is $$-$$ 13.6 eV. The kinetic energy of an electron in

Which one of the following represents forward bias diode ?

In the following circuit, the output Y for all possible inputs A and B is expressed by the truth table.

In the energy band diagram of a material shown below, the open circles and filled circles denote holes and electrons res

For a cubic crystal structure which one of the following relations indicating the cell characteristics is correct ?