In ornithine cycle, which of the following wastes are removed from the blood?

As compared to a C₃-plant, how many additional molecules of ATP are needed for net production of one molecule of hexose sugar by C₄-plants?

Photosynthetic Active Radiation (PAR) has the following range of wavelengths.

The ability of the Venus Flytrap to capture insects is due to

During which stage in the complete oxidation of glucose are the greatest number of ATP molecules formed from ADP?

An acromian process is characteristically found in the

The net pressure gradient that causes the fluid to filter out of the glomeruli into the capsule is

A person is undergoing prolonged fasting. His urine will be found to contain abnormal quantities of

Which of the following pairs is correctly matched?

In a man, abducens nerve is injured. Which one of the following functions will be affected?

Parkinson's disease (characterized by tremors and progressive rigidity of limbs) is caused by degeneration of brain neurons that are involved in movement control and make use of neurotransmitter

Which one of the following is the example of the action of the autonomous nervous system?

Which one of the following represents an ovule, where the embryo sac becomes horse-shoe shaped and the funiculus and micropyle are close to each other?

In a type of apomixis known as advice embryony, embryos develop directly from the

Through which cell of the embryo sac, does the pollen tube enter the embryo sac?

Grey crescent is the area -

If mammalian ovum fails to get fertilized, which one of the following is unlikely

Haemophilia is more commonly seen in human males than in human females because -

A women with 47 chromosomes due to three copies of chromosome 21 is characterized by -

Which of the following unicellular organisms has a macronucleus for trophic function and one or more micronuclei for reproduction?

Basophilic prokaryotes

There exists a close association between the alga and the fungus within a lichen. The fungus

All of the following statements concerning the actinomycetous filamentous soil bacterium Frankia are correct except that Frankia

For retting of jute the fermenting microbe used is

Auxospores and hormogonia are formed, respectively, by

Match items in column $${\rm I}$$ with those in column $${\rm I}$$$${\rm I}$$.

Column $${\rm I}$$		Column $${\rm I}$$$${\rm I}$$
(A)	Peritrichous flagellation	(J)	Ginkgo
(B)	Living fossil	(K)	Macrocystis
(C)	Rhizophore	(L)	Eschericha coli
(D)	Smallest flowering plant	(M)	Selaginella
(E)	Largest perennial alga	(N)	Wolffia

Select the correct answer from the following.

Ectophloic siphonostele is found in

Top-shaped multiciliate male gametes and the nature seed which bears only one embryo with two cotyledons, are characterised features of

Which one of the following characters is not typical of the class mammalia?

In contrast to annelids the platyhelminthes show

From the following statements select the wrong one

G-6-P dehydrogenase deficiency is associated with haemolysis of -

Enzymes, vitamins and hormones can be classified into a single category of biological chemicals, because all of these

Which of the following is the simplest amino acid?

Which of the following represents the edible part of the fruit of litchi?

Which one of the following statements regarding enzyme inhibition is correct?

Why is vivipary an undesirable character for annual crop plants?

Carbohydrates, the most abundant biomolescule on earth, are produced by

Nucleotides are building blocks of nucleic acids. Each nucleotide is a composite molecule formed by

The catalytic efficiency of two different enzymes can be compared by the

Photosynthesis in C₄ plants is relatively less limited by atmospheric CO₂ levels because

At what stage of the cell cycle are histone proteins synthesized in a eukaryotic cell?

In a woody dicotyledonous tree, which of the following parts will mainly consist of primary tissues ?

Golden rice is a transgenic crop of the future with the following improved trait -

Production of a human protein in bacteria by genetic engineering is possible because

Bacillus thuringiensis (Bt) strains have been used for designing novel -

According to IUCN Red List, what is the status of Red Panda (Ailurus fulgens) ?

Which one of the following pairs in mismatched ?

At which latitude, heat gain through insolation approximately equals heat loss through terrestrial radiation -

Biodiversity Act of India was passed by the Parliament in the year -

Animals have the innate ability to escape from predation. Examples for the same are given below. Select the incorrect example

More than 70% of world's fresh water is contained in –

Damage to thymus in a child may lead to

Four healthy people in their twenties got involved in injuries resulting in damage and death of a few cell of the following. Which of the cells are least likely to be replaced by new cells -

Chlorophyll in chloroplasts is located in

According to widely accepted "fluid mosaic model" cell membranes are semi-fluid, where lipids and integral proteins can diffuse randomly. In recent years, this model has been modified in several respects. In this regard, which of the following statements are incorrect ?

Chemiosmotic theory of ATP synthesis in the chloroplasts and mitochondria is based on

The main organelle involved in modification and routing of newly synthesized proteins to their destinations is -

A student wishes to study the cell structure under a light microscope having 10X eyepiece and 45X objective. He should illuminate the object by which one of the following colours of light so as get the best possible resolution ?

Centromere is required for -

A women with 47 chromosomes due to three copies of chromosome 21 is characterized by

Which one of the following makes use of RNA as a template to synthesize DNA -

A man and a woman, who do not show any apparent signs of a certain inherited disease, have seven children (2 daughter and 5 sons). Three of the sons suffer from the given disease but none of the daughters are affected. Which of the following mode of inheritance do you suggest for this disease

E. coli cells with a mustard z gene of the lac operon cannot grow in medium containing only lactose as the source of energy because -

A woman with normal vision, but whose father was colour bind, marries a colour blind man. Suppose that the fourth child of this couple was a boy. This boy -

Telomerase is an enzyme which is a -

Which one of the following hydrolyses internal phosphodiester bonds in a polynucleotide chain ?

Which of the following is not a hereditary disease ?

Using imprints from a plate with complete medium and carrying bacterial colonies, you can select streptomycin resistant mutants and prove that such mutations do not originates as adaptation. These imprints need to be used -

In order to find out the different types of gametes produced by a pea plants having the genotype AaBb, it should be crossed to a plant with the genotype -

Which of the following is not true for a species ?

At a particular locus, frequency of 'A' allele is 0.6 and that of 'a' is 0.4. What would be the frequency of heterozygotes in a random mating population at equilibrium ?

There are two opposing views about origin of modern man. According to one view Homo erectus in Asia were the ancestors of modern man. A study of variation of DNA however suggested African origin of modern man. What kind of observation of DNA variation could suggest this ?

One of the most important functions of botanical gardens is that

Which one of the following experiments suggests that simplest living organisms could not have originated spontaneously from non-living matter ?

Which one of the following phenomena supports Darwin's concept of natural selection in organic evolution ?

Which of the following is the relatively most accurate method for dating of fossils ?

During transcription holoenzyme RNA polymerase binds to a DNA sequence and the DNA assumes a saddle like structure at the point. What is the sequence called ?

Protein synthesis in an animal cell occurs -

De Vries gave his mutation theory on organic evolution while working on -

The world's highly prized wool yielding 'Pashmina' breed is -

Which one of the following depresses brain activity and produces feelings of calmness, relaxation and drowsiness ?

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

The energy of second Bohr orbit of the hydrogen atom is $$-$$328 kJ mol^$$-$$1; hence the energy of fourth Bohr orbit would be

For a first order reaction A $$ \to $$ B the reaction rate a reactant concentration of 0.01 M is found to be 2.0 $$ \times $$ 10^$$-$$5 mol L^$$-$$1 s^$$-$$1. The half-life period of the reaction is

The cell membranes are mainly composed of

Electrolytic reduction of nitrobenzene in weakly acidic medium gives

A solution of urea (mol. mass 56 g mol^$$-$$1) boils at 100.18^oC at the atmospheric pressure. If K_f and K_b for water are 1.86 and 0.512 K kg mol^$$-$$1 respectively, the above solution will freeze at

4.5 g of aluminium (at. mass 27 amu) is deposited at cathode from Al³⁺ solution by a certain quantity of electric charge. The volume of hydrogen produced at STP from H ions in solution by the same quantity of electric charge will be

The vapour pressure of two liquids P and Q are 80 and 60 torr, respectively. The total vapour pressure of solution obtained by mixing 3 mole of P and 2 mole of Q would be

The mole fraction of the solute in one molal aqueous solution is

A solution has a 1 : 4 mole ratio of pentane to hexane. The vapour pressures of the pure hydrocarbons at 20^oC are 440 mm Hg for pentane and 120 mm Hg for hexane. The mole fraction of pentane in the vapour phase would be

The mass of carbon anode consumed (giving only carbon dioxide) in the production of 270 kg of aluminium metal from bauxite by the Hall process is
(Atomic mass : Al = 27)

The rate of reaction between two reactions A and B decreases by a factor of 4 if the concentration of reactant B is doubled. The order of this reaction with respect to reactant B is

Aniline in a set of reactions yielded a product D.

The structure of the product D would be

Which of the following would have a permanent dipole moment?

What is the correct relationship between the pH of isomolar solutions of sodium oxide, Na₂O (pH₁), sodium sulphide, Na₂S (pH₂), sodium srlenide, Na₂Se (pH₃) and sodium telluride Na₂Te (pH₄)?

Which one of the following oxides is expected to exhibit paramagnetic behaviour?

More number of oxidation states are exhibited by the actinoids than by the lanthanoids. The main reason for this is

Four successive members of the first row transition elements are listed below with their atomic numbers. Which one of them is expected to have the highest third ionisation enthalpy?

A nuclide of an alkaline earth metal undergoes radioactive decay by emission of the periodic table to which the resulting daughter element would belong is

The aqueous solution containing which one of the following ions will be colourless?
(Atomic number : Sc = 21, Fe = 26, Ti = 22, Mn = 25)

The number of moles of KMnO₄ reduced by one mole of KI in alkaline medium is

Which one of the following is an inner orbital complex as well as diamagnetic in behaviour?

Which one of the following is expected to exhibit optical isomerism? (en = ethylenediamine)

The best method for the separation of naphthalene and benzoic acid from their mixture is

The correct order in which the O $$-$$ O bond length increases in the following is

The surface tension of which of the following liquid is maximum ?

Which one of the following arrangements represents the correct order of electron gain enthalpy (with negative sign) of the given atomic species ?

Which of the following molecules has trigonal planar geometry?

Which of the following pairs of a chemical reaction is certain to result in a spontaneous reaction ?

A reaction occurs spontaneously if

The absolute enthalpy of neutralisation of the reaction :

Mg(O)_(s) + 2HCl_(aq) $$ \to $$ MgCl_2(aq) + H₂O_(l) will be

Equilibrium constants K₁ and K₂ for the following equilibriam:


are related as

At 25^oC, the dissociation constant of a base, BOH, is 1.0 $$ \times $$ 10^$$-$$12. The concentration of hydroxyl ions in 0.01 M aqueous solution of the base would be

H₂S gas when passed through a solution of cations containing HCl precipitates the cations of second group of qualitative analysis but not those belonging to the fourth group. It is because

Which amongst the following is the most stable carbocation?

Which of the following undergoes nucleophilic substitution exclusively by S_N1 mechanism?

Which one of the following alkenes will react faster with H₂ under catalytic hydrogenation conditions ?

Products of the following reaction :

Which one of the following pairs represents stereoisomerism?

The chirality of the compound

Names of some compounds are given. Which one is not in IUPAC system?

Which one of the following compounds is most acidic?

The correct sequence of increasing covalent character is represented by

The major organic product formed from the following reaction :


is

In a set of reactions acetic acid yielded a product D.

The structure of D would be

Which functional group participates in disulphide bond formation in proteins?

For the network shown in the figure the value of the current $$i$$ is

A network of four capacitors of capacity equal to C₁ = C, C₂ = 2C, C₃ = 3C and C₄ = 4C are connected to a battery as shown in the figure. The ratio of the charges on C₂ and C₄ is

Two batteries, one of emf 18 volts and internal resistance 2 $$\Omega $$ and the other of emf 12 volts and internal resistance 1 $$\Omega $$, are connected as shown. The voltmeter V will record a reading of

A 5-ampere fuse wire can withstand a maximum power of 1 watt in the circuit. The resistance of the fuse wire is

If the magnetic dipole moment of an atom of diamagnetic material, paramagnetic material and ferromagnetic material are denoted by $$\mu $$_d, $$\mu $$_p and $$\mu $$_f respectively, then

If $$\lambda $$_v, $$\lambda $$_x and $$\lambda $$_m represent the wavelengths of visible light, X-rays and microwaves respectively, then

As a result of change in the magnetic flux linked to the closed loop as shown in the figure, an e.m.f. $$V$$ volt is induced in the loop. The work done (joule) in taking a charge Q coulomb once along the loop is

In a circuit L, C and R are connected in series with an alternating voltage source of frquency $$f.$$ The current leads the voltage by 45^o. The value of C is

The angular resolution of a 10 cm diameter telescope at a wavelength of 5000 $$\mathop A\limits^ \circ $$ is of the order of

The work functions for metals A, B and C are respectively 1.92 eV, 2.0 eV and 5 eV. According to Einstein's equation the metals which will emit photoelectrons for a radiation of wavelength 4100 $$\mathop A\limits^ \circ $$ is/are

A photosensitive metallic surface has work function, h$$\upsilon $$₀. If photons of energy $$2h{\upsilon _0}$$ fall on this surface, the electrons come out with a maximum velocity of 4 $$ \times $$ 10⁶ m/s. When the photon energy is increased to 5 h$$\upsilon $$₀, then maximum velocity of photoelectrons will be

Two charges q₁ and q₂ are placed 30 cm apart, as shown in the figure. A third charge q₃ is moved along the arc of a circle of radius 40 cm from C to D.

The change in the potential energy of the system is $${{{q_3}} \over {4\pi {\varepsilon _0}}}$$ where k is

Energy levels A, B and C of a certain atom corresponding to increasing values of energy i.e. E_A < E_B < E_C. If $$\lambda $$₁, $$\lambda $$₂ and $$\lambda $$₃ are wavelengths of radioations corresponding to transitions C to B, B to A and C to A respectively, which of the following relations is correct?

Application of a forward bias to a p-n junction

Carbon, silicon and germanium atoms have four valence electrons each. Their valence and conduction bands are separated by energy band gaps represented by (E_g)_C, (E_g)_si and (E_g)_Ge respectively. Which one of the following relationships is true in their case?

In the reaction $${}_1^2$$H + $${}_1^3$$H $$ \to $$ $${}_2^4$$He + $${}_0^1$$n, if the binding
energies of $${}_1^2$$ H, $${}_1^3$$H and $${}_2^4$$He are respectively a, b and c (in MeV),
then the energy (in MeV) released in this reaction is

In any fission process the ratio

mass of fission products

mass of parent nucleus

is

Fission of nuclei is possible because the binding energy per nucleon in them

Copper has face centered cubic (fcc) lattice with interatomic spacing equal to 2.54 $$\mathop A\limits^ \circ $$. The value of lattice constant for this lattice is

Zener diode is used for

Choose the only false statement from the following.

The total energy of an electron in the first excited state of hydrogen atom is about $$-$$ 3.4 eV. Its kinetic energy in this state is

In a p-n junction photo cell, the value of the photo-electromotive force profuced by monochromatic light is proportional to

Imagine a new planet having the same density as that of earth but it is 3 times bigger than the earth in size. If the acceleration due to gravity on the surface of earth is g and that on the surface of the new planet is g', then

The ratio of the dimensions of Planck's constant and that of moment of inertia is the dimensions of

The displacement x of a particle varies with time t as x = ae^$$-$$at + be^{$$\beta $$t}, where a, b, $$\alpha $$ and $$\beta $$ are positive constants. The velocity of the particle will

Two boys are standing at the ends A and B of a ground where AB = a. The boy at B starts running in a direction perpendicular to AB with velocity v₁. The boy at A starts running simultaneously with velocity v and catches the other in a time t, where t is

If a vector $$2\widehat i + 3\widehat j + 8\widehat k$$ is perpendicular to the vector $$4\widehat j - 4\widehat i + \alpha \widehat k,$$ then the value of $$\alpha $$ is

A stone tied to the end of a string of 1 m long is whirled in a horizontal circle with a constant speed. If the stone makes 22 revoluations in 44 seconds, what is the magnitude and direction of acceleration of the stone ?

If the angle between the vectors $$\overrightarrow A $$ and $$\overrightarrow B $$ is $$\theta $$, the value of the product $$\left( {\overrightarrow B \times \overrightarrow A } \right).\overrightarrow A $$ is equal to

A drum of radius R and mass M, rolls down without slipping along an inclined plane of angle $$\theta $$. The frictional force

The moment of inertia of a uniform circular disc of radius R and mass M about an axis passing from the edge of the disc and normal to the disc is

A force F acting


on an object varies with distance x as shown here. The force is in N and x in m. The work done by the force in moving the object from x = 0 to x = 6 m is

Two bodies have their moments of inertia I and 2I respectively about their axis of rotation. If their kinetic energies of rotation are equal, their angular velocity will be in the ratio

A bomb of mass 30 kg at rest explodes into two pieces of masses 18 kg and 12 kg. The velocity of 18 kg mass is 6 m s^$$-$$1. The kinetic energy of the other mass is :

For a satellite moving in an orbit around the earth, the ratio of kinetic energy to potential energy is

Which of the following rods, (given radius r and length $$l$$) each made of the same material and whose ends are maintained at the same temperature will conduct most heat ?

The circular motion of a particle with constant speed is

An ideal gas heat engine operates in Carnot cycle between 227^oC and 127^oC. It absorbs 6 $$ \times $$ 10⁴ cal of heat at higher temperature. Amount of heat converted to work is

Which of the following processes is reversible?

A point source emits sound equally in all directions in a non-absorbing medium. Two points P and Q are at distances of 2 m and 3 m respectively from the source. The ratio of the intensities of the waves at P and Q is

As per the diagram a point charge +q is placed at the origin O. Work done in taking another point charge $$-$$Q from the point A [coordinates (0, $$a$$)] to another point B

When a wire of uniform cross-section $$a$$ length $$l$$ and resistance R is bent into a complete circle. resistance between any two of diametrically opposite points will be

A very long straight wire carries a current $$I$$. At the instant when a charge +Q at point P has velocity $$\overrightarrow v $$, as shown, the force on the charge is

A coil in the shape of an equilateral triangle of side $$l$$ is suspended between the pole pieces of a permanent magnet such that $$\overrightarrow B $$ is in plane of the coil. If due to a current i in the triangle a torque $$\tau $$ acts on it, the side $$l$$ of the triangle is

An electron moves in a circular orbit with a uniform speed v. It producess a magnetic field B at the centre of the circle. The radius of the circle is proportional to

A ball is thrown vertically upward. It has a speed of 10 m/sec when it has reached one half of its maximum height. How high does the ball rise?
(Take g = 10 m/s².)