Approximately seventy percent of carbon-dioxide absorbed by the blood will be transported to the lungs

In 'S' phase of the cell cycle

The enzyme recombinase is required at which stage of meiosis?

During which phase(s) of cell cycle, amount of DNA in a cell remains at 4C level if the initial amount is denoted as 2C?

Select the option which is not correct with respect to enzyme action.

A few normal seedlings of tomato were kept in a dark room. After a few days they were found to have become white -coloured like albinos. Which of the following terms will you use to describe them?

Dr. F. went noted that if coleoptile tips were removed and placed on agar for one hour, the agar would produce a bending when placed on one side of freshly-cut coleoptile stumps. Of what significance is this experiment?

Which one of the following growth regulators is known as 'stress hormone'?

In which one of the following processes CO₂ is not released?

Which one of the following is a non - reducing carbohydrate?

Person with blood group AB is considered as universal recipient because he has

How do parasympathetic neutral signals affect the working of the heart?

Which of the following causes an increase in sodium reabsorption in the distal convoluted tubule?

Stimulation of a muscle fiber by a motor neuron occurs at

Select the correct matching of the type of the joint with the example in human skeletal system.

Injury localized to the hypothalamus would most likely disrupt

Flight-or-flight reactions cause activation of

Identify the hormone with its correct matching of source and function.

Viruses have

Five kingdom system of classification suggested by R.H. Whittaker is not based on

Male gametophyte with least number of cells is present in

Which structures perform the function of mitochondria in bacteria?

The motile bacteria are able to move by

Which of the following is responsible for peat formation?

Which of the following shows coiled RNA strand and capsomeres?

Anoxygenic photosynthesis is characteristic of

Which one of the following is wrong about Chara?

Which one of the following shows isogamy with non-flagellated gametes?

Archaebacteria differ from eubacteria in

Select the taxon mentioned that represents both marine and fresh water species.

Planaria possesses high capacity of

Planaria possesses high capacity of

A marine cartilaginous fish that can produce electric current is

Which one of the following living organisms completely lacks a cell wall?

When the margins of sepals or petals overlap one another without any particular direction, the condition is termed as

An example of edible underground steam is

Placenta and pericarp are both edible portions in

Which one of the following statements is correct?

If 20 J of energy is trapped at producer level, then how much energy will be available to peacock as food in the following chain?
Plant → mice → snake → peacock

An analysis of chromosomal DNA using the Southern hybridization technique does not use:

Which vector can clone only a small fragment of DNA ?

Commonly used vectors for human genome sequencing are :

The first human hormone produced by recombinant DNA technology is :

Given below is a simplified model of phosphorus cycling in a terrestrial ecosystem with four blanks (A-D). Identify the blanks.

A species facing extremely high risk of extinction in the immediate future is called :

Given below is the representation of the extent of global diversity of invertebrates. What groups the four portions (A-D) represent respectively?

Match the following and select the correct option:

(a) Earthworm	(i) Pioneer species
(b) Succession	(ii) Detritivore
(c) Ecosystem service	(iii) Natality
(d) Population growth	(iv) Pollination

The organization which publishes the Red List of species is :

An example of ex situ conservation is :

Just as a person moving from Delhi to Shimla to escape the heat for the duration of hot summer, thousands of migratory birds from Siberia and other extremely cold northern regions move to:

You are given a fairly old piece of dicot stem and a dicot root. Which of the following anatomical structures will you use to distinguish between the two?

Choose the correctly matched pair:

Choose the correctly matched pair :

Tracheids differ from other tracheary elements in :

The solid linear cytoskeletal elements having a diameter of 6 nm and made up of a single type of monomer are known as:

The osmotic expansion of a cell kept in water is chiefly regulated by:

Match the following and select the correct answer :

(a) Centriole	(i) Infoldings in mitochondria
(b) Chlorophyll	(ii) Thylakoids
(c) Cristae	(iii) Nucleic acid
(d) Ribozymes	(iv) Basal body cilia or flagella

Which of the following is a hormone releasing Intra Uterine Device (IUD)?

An aggregate fruit is one which develops from

Geitonogamy involves

Pollen tablets are available in the market for

The shared terminal duct of the repoductive and urinary system in the human male is

Function of filiform apparatus is to

The main function of mammalian corpus luteum is to produce

Select the correct option describing gonadotropin activity in a normal pregnant female.

Non-albuminous seed is produced in

Tubectomy is a method of sterilization in which :

Assisted reproductive technology, IVF involves transfer of :

Which one of the following is wrongly matched?

Transformation was discovered by :

Select the correct option ;

Which one of the following fungi contains hallucinogens?

Which is the particular type of drug that is obtained from the plant whose one flowering branch is shown below?

At which stage of HIV infection does one usually show symptoms of AIDS ?

What gases are produced in anaerobic sludge digesters ?

An alga which can be employed as food for human being is :

To obtain virus−free healthy plants from a diseased one by tissue culture technique, which part/parts of the diseased plant will be taken ?

Which of the following complexes is used to be as an anticancer agent?

Among the following complexes the one which shows zero crystal field stabilization energy (CFSE) is

D(+)-glucose reacts with hydroxyl amine and yields an oxime. The structure of the oxime would be

Which of the following compounds will undergo racemisation when solution of KOH hydrolyses?

The pair of compounds that can exist together is

Which one is most reactive towards nucleophilic addition reaction?

(I)   H₂O₂ + O₃ $$ \to $$ H₂O + 2O₂
(II)   H₂O₂ + Ag₂O $$ \to $$ 2Ag + H₂O + O₂
Role of Hydrogen peroxide in the above reactions is respectvely

In acidic medium, H₂O₂ changes Cr₂O₇^2- to CrO₅ which has two

($$-$$O$$-$$O$$-$$) bonds. Oxidation state of Cr in CrO₅ is

Which of the following hormones is produced under the condition of stress which simulate glycogenlysis in the liver of human beings?

In the following reaction, the product (A) is

Which of the following will be most stable diazonium salt RN₂⁺X^$$-$$?

Which of the following will not be soluble in sodium hydrogen carbonate?

Of the following 0.10 m aqueous solutions, which one will exhibit the largest freezing point depression?

When 0.1 mol MnO$$_4^{2 - }$$ is oxidised the quantity of electricity required to completely oxidise MnO$$_4^{2 - }$$ to MnO$$_4^ - $$ is

The weight of silver (at. wt. = 108) displaced by a quantity of electricity which displaces 5600 mL of O₂ at STP will be

Acidity of diprotic acids in aqueous solutions increases in the order

Reason of lanthanoid contraction is

The reaction of aqueous KMnO₄ with H₂O₂ in acidic conditions gives

Magnetic moment 2.83 BM is given by which of the following ions?
(At. nos. Ti = 22, Cr = 24, Mn = 25, Ni = 28)

Which of the following salts will give highest pH in water?

1.0 g of magnesium is burnt with 0.56 g O₂ in a closed vessel, Which reactant is left in excess and how much ? (At. wt. Mg = 24, O = 16)

Which of the following orders of ionic radii is correctly represented ?

When 22.4 liters of H_2(g) is mixed with 11.2 litres of Cl_2(g), each at S.T.P. the moles of HCl_(g) formed is equal to

Equal masses of H₂, O₂ and methane have been taken in a container of volume V at temperature 27^oC in identical conditions. The ratio of the volumes of gases H₂ : O₂ : methane would be

What is the maximum number of orbitals that can be identified with the following quantum numbers ?
n = 3, l = 1, m₁ = 0

Be²⁺ is isoelectronic with which of the following ions ?

Calculate the energy in joule corresponding to light of wavelength 45 nm. (Planck,s constant, h = 6.63 $$ \times $$ 10^$$-$$34 J s, speed of light, c = 3 $$ \times $$ 10⁸ m s^$$-$$1)

Which one of the following species has plane triangular shape ?

Which of the following molecules has the maximum dipole moment ?

Which of the following statements is correct for the spontaneous adsorption of a gas?

For the reaction, $${X_2}{O_{4\left( l \right)}}\,\, \to \,\,2X{O_{2(g)}}$$

$$\Delta $$U = 2.1 kcal, $$\Delta $$S = 20 cal K^$$-$$1 at 300 K

Hence, G is

For a given exothermic reaction, K_p and K'_p are the equilibrium constants at temperatures T₁ and T₂, respectively. Assuming that heat of reaction is constant in temperature range between T₁ and T₂, it is readily observed that

Using the Gibb's energy change, $$\Delta $$G^o = +63.3 kJ, for the following reaction,

Ag₂CO_3(s) $$\rightleftharpoons$$ 2 Ag⁺_(aq) + CO₃^2$$-$$ _(aq)
the K_sp of Ag₂CO_3(s) in water at 25^oC is
(R = 8.314 J K^$$-$$1 mol^$$-$$1)

For the reversible reaction,
N_2(g) + 3H_2(g) $$\rightleftharpoons$$ 2NH_3(g) + heat

The equilibrium shifts in forward direction

In the Kjeldahl's method for estimation of nitrogen present in a soil sample, ammonia evolved from 0.75 g of sample neutralized 10 mL of 1 M H₂SO₄. The percentage of nitrogen in the soil is

What products are formed when the following compound is treated with Br₂ in the presence of FeBr₃?

Identify Z in the sequence of reactions :

Which of the following organic compounds has same hybridization as its combustion product (CO₂)?

Among the following sets of reactants which one produces anisole?

Light with an energy flux of 25 $$ \times $$ 10⁴ W m^$$-$$2 falls on a perfectly reflecting surface at normal incidence. If the surface area is 15 cm², the average force exerted on the surface is

A conducting sphere of radius R is given a charge Q. The electric potential and the electric field at the centre of the sphere rrespectively are

Two cities are 150 km apart. Electric power is sent from one city to another city through copper wires. The fall of potential per km is 8 volt and the average resistance per km is 0.5 $$\Omega $$. The power loss in the wire is

In a region, the potential is represented by V(x, y, z) = 6x $$-$$ 8xy $$-$$ 8y + 6yz,   where $$V$$ is in volts and x, y, z are in metres. The electric force experienced by a charge of 2 coulomb situated at point (1, 1, 1) is

The resistances in the two arms of the meter bridge are 5 $$\Omega $$ and R$$\Omega $$ respectively. When the resistance R is shunted with an equal resistance, the new balance point is at 1.6$$l$$₁. The resistance R is

In an ammeter 0.2% of main current passes through the galvanometer. If resistance of galvanometer is G, the resistance of ammeter will be

Following figures show the arrangement of bar magnets in different configurations. Each magnet has magnetic dipole moment $$\overrightarrow m .$$ Which configuration has highest net magnetic dipole moment ?

A potentiometer circuit has been set up for finding the internal resistance of a given cell. The main battery, used across the potentiometer wire, has an emf of 2.0 V and a negligible internal resistance. The potentiometer wire itself is 4 m long. When the resistance R, connected across the given cell, has values of (i) infinity,    (ii) 9.5 $$\Omega $$
the balancing lengths on the potentiometer wire are found to be 3 m and 2.85 m, respectively. The value of internal resistance of the cell is

Two identical long conducting wires $$AOB$$ and $$COD$$ are placed at right angle to each other, with one above other such that $$O$$ is their common point for the two. The wires carry $$I$$₁ and $$I$$₂ currents, respectively. Point $$P$$ is lying at distance f from $$O$$ along a direction perpendicular to the plane containing the wires. The magnetic field at the point $$P$$ will be

If the focal length of objective lens is increased then magnifying power of

A beam of light of $$\lambda = 600$$ nm from a distant source falls on a single slit 1 mm wide and the resulting diffraction pattern is observed on a screen 2 m away. The distance between first dark fringes on either side of the central bright fringe is

Two thin dielectric slabs of dielectric constants K₁ and K₂(K₁ < K₂) are inserted between plates of a parallel plate capacitor, as shown in the figure. The variation of electric field E between the plates with distance d as measured from plate P is correctly shown by

A transformer having efficiency of 90% is working on 200 V and 3 kW power supply. If the current in the secondary coil is 6 A, the voltage across the secondary coil and the current in the primary coil respectively are

The angle of a prism is A. One of its refracting surfaces is silvered. Light rays falling at an angle of incidence 2 A on the first surface returns back through the same path after suffering reflection at the silvered surface.

The refractive index $$\mu $$, of the prism is

A thin semicircular conducting ring (PQR) of radius r is falling with its plane vertical in a horizontal magnetic field B, as shown in the figure.


The potential difference developed across the ring when its speed is $$v$$, is

In the Young's double slit experiment, the intensity of light at a point on the screen where the path difference $$\lambda $$ is K, ($$\lambda $$ being the wavelength of light used). The intensity at a point where the path difference is $$\lambda $$/4 will be

Hydrogen atom in ground state is excited by a monochromatic radiation of $$\lambda $$ = 975 $$\mathop A\limits^ \circ $$. Number of spectral lines in the resulting spectrum emitted will be

When the energy of the incident radiation is increased nby 20%, the kinetic energy of the photoelectrons emitted from a metal surface increased from 0.5 eV to 0.8 eV. The work function of the metal is

If the kinetic energy of the particle is increased to 16 times its previous value, the percentage change in the de Broglie wavelength of the particle is

The binding energy per nucleon of and nuclei are 5.60 MeV and 7.06 MeV respectively. In the nuclear reaction

$${}_3^7Li + {}_1^1H \to {}_2^4He + _2^4He + Q$$

the value of energy Q released is

The given graph represents V-I characteristic for a semiconductor device.



Which of the following statement is correct ?

A black hole is an object whose gravitational field is so strong that even light cannot escape from it. To what approximate radius would earth (mass = 5.98 $$ \times $$ 10²⁴ kg) have to be compressed to be a black hole?

A body of mass (4m) is lying in x-y plane at rest. It suddenly explodes into three pieces. Two pieces, each of mass (m) move perpendicular to each other with equal speeds (v). The total kinetic energy generated due to explosion is :

A system consists of three masses m₁, m₂ and m₃ connected by a string passing over a pulley P. The mass m₁ hangs freely and m₂ and m₃ are on a rough horizontal table (the coefficient of friction = $$\mu $$). The pulley is frictionless and of negligible mass. The downward acceleration of mass m₁ is (Assume m₁ = m₂ = m₃ = m)

A balloon with mass m is descending down with an acceleration a (where a < g). How much mass should be removed from it so that it starts moving up with an acceleration a ?

The force F acting on a particle of mass m is indicated by the force-time graph shown below. The change in momentum of the particle over the time interval from zero to 8 s is :

A projectile is fired from the surface of the earth with a velocity of 5 m s^$$-$$1 and angle $$\theta $$ with the horizontal. Another projectile fired from another planet with a velocity of 3 m s^$$-$$1 at the same angle follows a trajectory which is identical with the trajectory of the projectile fired from the earth. The value of the acceleration due to gravity on the planet is (in m s^$$-$$2) is
(Given g = 9.8 m s^$$-$$2)

A particle is moving such that is position coordinates (x, y) are (2 m, 3 m) at time t = 0, (6 m, 7 m)
at time t = 2 s and (13 m, 14 m) at time t = 5 s.

Average velocity vector $$\left( {{{\overrightarrow v }_{av}}} \right)$$ from t = 0 to t = 5 s is

A solid cylinder of mass 50 kg and radius 0.5 m is free to rotate about the horizontal axis. A massless string is wound round the cylinder with one end attached to it and other hanging freely. Tension in the string required to produce an angular acceleration of 2 revolutions s^$$-$$2 is

The ratio of the accelerations for a solid sphere (mass m and radius R) rolling down an incline of angle $$\theta $$ without slipping and slipping down the incline without rolling is

Dependence of intensity of gravitational field (E) of earth with distance (r) from centre of earth is correctly represented by

Certain quantity of water cools from 70^oC to 60^oC in the first 5 minutes and to 54^oC in the next 5 minutes. The temperature of the surroundings is

The barrier potential of a p-n junction depends on
(1)   type of semiconductor material
(2)   amount of doping

(3)   temperature

Which one of the following is correct ?

Copper of fixed volume V is drawn into wire of length $$l$$. When this wire is subjected to a constant force F, the extension produced in the wire is $$\Delta $$$$l$$. Which of the following graphs is a straight line ?

A certain number of spherical drops of a liquid of radius r coalesce to form a single drop of radius R and volume V. If T is the surface tension of the liquid, then

Steam at 100^oC is passed into 20 g of water at 10^oC. When water acquires a temperature of 80^oC, the mass of water present will be
[Take specific heat of water = 1 cal g^{$$-$$1 o}C^$$-$$1 and latent heat of steam = 540 cal g^$$-$$1]

A thermodynamic system undergoes cyclic process ABCDA as shown in figure. The work done by the system in the cycle is

The mean free path of molecules of a gas, (radius r) is inversely proportional to

A monatomic gas at a pressure P, having a volume V expands isothermally to a volume 2V and then adiabatically to a volume 16V. The final pressure of the gas is (Take $$\gamma $$ = 5/3)

The oscillation of a body on a smooth horizontal surface is represented by the equation,
X = A cos$$\left( {\omega t} \right)$$
where X = displacement at time t
$$\omega $$ = frequency of oscillation
Which one of the following graphs shows correctly the variation a with t?
Here a = acceleration at time t
T = time period

The number of possible natural oscillations of air column in a pipe closed at one end length 85 cm whose frequencies lie below 1250 Hz are (Velocity of sound = 340 m s^$$-$$1)

If n₁, n₂ and n₃ are the fundamental frequencies of three segments into which a string is divided, then the original fundamental frequency n of the string is given by

If force (F), velocity (V) and time (T) are taken as fundamental units, then dimensions of mass are