Which of the following are found in extreme saline conditions?

Viroids differ from viruses in having

Which among the following are the smallest living cells, known without a definite cell wall, pathogenic to plants as wel

DNA replication in bacteria occurs

Which of the following components provides sticky character to the bacterial cell?

An example of colonial alga is

Select the mismatch

Zygotic meiosis is characteristic of

Life cycles of Ectocarpus and Fucus respectively are

Which among these is the correct combination of aquatic mammals?

In case of proiferans, the spongocoel is lined with flagellated cells called

Important characteristic that hemichordates share with chordates is

Which of the following represents order of 'Horse'?

The morphological nature of the edible part of coconut is

Coconut fruit is a

In Bougainvillea, throns are the modifications of

Which of the following statements is correct with reference to enzymes?

Which of the following are not polymeric?

Anaphase Promoting Complex (APC) is a protein degradation machinery necessary for proper mitosis of animal cell. If APC

Which of the following options gives the correct sequence of events during mitosis?

The water potential of pure water is

Which of the following facilitates opening of stomatal aperture?

With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct?

Phosphoenol pyruvate (PEP) is the primary CO2 acceptor in

Which statement is wrong for Krebs' cycle?

Fruit and leaf drop at early stages can be prevented by the application of

Which cells of 'Crypts of Lieberkuhn' secrete antibacterial lysozyme?

Which of the following options best represents the enzyme composition of pancreatic juice?

A baby boy aged two years is admitted to play school and passes through a dental check-up. The dentist observed that the

Lungs are made up of air-filed sacs, the alveoli. The do not collapse even after forceful expiration, because of

Adult human RBCs are enucleate. Which of the following statement(s) is/are most appropriate explanation for this feature

The hepatic portal vein drains blood to liver from

A decrease in blood pressure/volume will not cause the release of

Which of the following statements is correct?

The pivot joint between atlas and axis is a type of

Out of 'X' pairs of ribs in humans only 'Y' pairs are true ribs. Select the option that correctly represents values of X

Receptor sites for neurotransmitters are present on

Myelin sheath is produced by

Good vishion depends on adequate intake of carotene rich food. Select the best option from the following statements. (1

GnRH, a hypothalamic hormone, needed in reproduction, acts on

Hypersecretion of growth hormone in adults does not cause further increase in height, because

A temporary endocrine gland in the human body is

Functional megaspore in an angiosperm develops into an

Flowers which have single ovule in the ovary and are packed into inflorescence are usualy pollinated by

A dioecious flowering plant prevents both

Attractants and rewards are required for

Double fertilisation is exhibited by

Capacitation occurs in

Match the following sexually transmitted diseases (Column – I) with their causative agent (Column – II) and select the c

The function of copper ions in copper releasing IUD's is :

In case of a couple where the male is having a very low sperm count, which technique will be suitable for fertilization

Thalassemia and sickle cell anemia are caused due to a problem in globin molecule synthesis. Select the correct statemen

The genotypes of a Husband and Wife are IAIB and IAi. Among the blood types of their children, how many different genoty

A disease caused by an autosomal primary non-disjunction is :

Which one from those given below is the period for Mendel’s hybridisation experiments ?

If there are 999 bases in an RNA that codes for a protein with 333 amino acids, and the base at position 901 is deleted

The final proof for DNA as the genetic material came from the experiments of

During DNA replication, Okazaki fragments are used to elongate

Which of the following RNAs should be most abundant in animal cell ?

Spliceosomes are not found in cells of :

The association of histone H1 with a nucleosome indicates :

Transplantation of tissues/ organs fails often due to non-acceptance by the patient's body. Which type of immuneresponse

MALT constitutes about ________ percent of the lymphoid tissue in human body

Artificial selection to obtain cows yielding higher milk output represents :

Homozygous purelines in cattle can be obtained by :

Select the mismatch :

Which of the following in sewage treatment removes suspended solids ?

Which of the following is correctly matched for the product produced by them ?

The DNA fragments separated on an agarose gel can be visualised after staining with

What is the criterion for DNA fragments movement on agarose gel during gel electrophoresis ?

DNA fragments are

A gene whose expression helps to identify transformed cell is known as

The process of separation and purification of expressed protein before marketing is called :

Presence of plants arranged into well defined vertical layers depending on their height can be seen best in :

Plants which produce characteristic pneumatophores and show vivipary belong to :

Asymptote in a logistic growth curve is obtained when :

Mycorrhizae are the example of :

Which ecosystem has the maximum biomass ?

Which one of the following is related to Ex-situ conservation of threatened animals and plants ?

The region of Biosphere Reserve which is legally protected and where no human activity is allowed is known as :

Alexander Von Humbolt described for the first time :

Which one of the following statements is not valid for aerosols ?

The vascular cambium normally gives rise to :

Which of the following is made up of dead cells ?

Identify the wrong statement in context of heartwood :

Root hairs develop from the region of :

Select the correct route for the passage of sperms in male frogs :

Frog’s heart when taken out of the body continues to beat for sometime. Select the best option from the following statem

Which of the following cell organelles is responsible for extracting energy from carbohydrates to form ATP?

In case of poriferans, the spongocoel is lined with flagellated cells called

Among the following characters, which one was not considered by Mendel in his experiments on pea?

Which one is the wrong statement ?

The element Z = 114 has been discovered recently. It will belong to which of the following family/group and electronic c

The species, having bond angles of 120o is

Which of the following pairs of compounds is isostructural ?

Which one of the following pairs of species have the same bond order ?

For a given reaction, $$\Delta $$H = 35.5 kJ mol$$-$$1 and $$\Delta $$S = 83.6 J K$$-$$1 mol$$-$$1. The reaction is spon

A gas is allowed to expand in a well insulated container against a constant external pressure of 2.5 atm from an initial

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

Concentration of the Ag+ ions in a saturated solution of Ag2C2O4 is 2.2 $$ \times $$ 10$$-$$4 mol L$$-$$1. Solubility pr

A 20 litre container at 400 K contains CO2(g) at pressure 0.4 atm and an excess of SrO (neglect the volume of solid SrO)

The IUPAC name of the compound

The correct statement regarding electrophile is

The most suitable method of separation of 1 : 1 mixture of ortho and para-nitrophenols is

Which one is the correct order of acidity?

Predict the correct intermediate and product in the following reaction : $${H_3}C - C \equiv CH\mathrel{\mathop{\kern0pt

With respect to the conformers of ethane, which of the following statements is true?

Identify $$A$$ and predict the type of reaction.

The heating of phenyl methyl ether with HI produces

Which one is the most acidic compound?

Ionic mobility of which of the following alkali metal ions is lowest when aqueous solution of their salts are put under

Consider the reactions, Identify A, X, Y and Z.

Of the following, which is the product formed when cyclohexanone undergoes aldol condensation followed by heating?

The correct increasing order of basic strength for the following compounds is

Which of the following reactions is appropriate for converting acetamide to methanamine?

Which of the following statements is not correct?

Which is the incorrect statement?

If molality of the dilute solution is doubled, the value of molal depression constant (Kf) will be

Which of the following is dependent on temperature?

In the electrochemical cell : $$Zn\left| {ZnS{O_4}\left( {0.01\,M} \right)} \right|$$$$\left| {CuS{O_4}\left( {1.0M} \ri

Mechanism of a hypothetical reaction X2 + Y2 $$ \to $$ 2XY, is given below : (i)   X2 $$ \to $$ X + X (fast

A first order reaction has a specific reaction rate of 10$$-$$2 sec$$-$$1. How much time will it take for 20 g of the re

Which one of the following statements is not correct?

It is because of inability of ns2 electrons of the valence shell to participate in bonding that

Match the interhalogen compounds of column-I with the geometry in column-II and assign the correct code. .tg {border-c

In which pair of ions both the species contain S $$-$$ S bond?

Extraction of gold and silver involves leaching with CN$$-$$ ion. Silver is later recovered by

HgCl2 and I2 both when dissolved in water containing I$$-$$ ions, the pair of species formed is

Name the gas that can readily decolourise acidified KMnO4 solution.

The reason for greater range of oxidation states in actinoids is attributed to

Mixture of chloroxylenol and terpineol acts as

An example of a sigma bonded organometallic compound is

The correct order of the stoichiometries of AgCl formed when AgNO3 in excess is treated with the complexes : CoCl3.6NH3

Correct increasing order for the wavelengths of absorption in the visible region for the complexes of Co3+ is

Pick out the correct statement with respect to [Mn(CN)6]3$$-$$.

Which of the following is a sink for CO?

A physical quantity of the dimensions of length that can be formed out of c, G and $${{{e^2}} \over {4\pi {\varepsilon _

Preeti reached the metro station and found that the escalator was not working. She walked up the sationary escalator i

The x and y coordinates of the particle at any time are x = 5t $$-$$ 2t2 and y = 10t respectively, where x and y are in

One end of string of length $$l$$ is connected to a particle of mass 'm' and the other end is connected to a small peg o

Two blocks A and B of masses 3m and m respectively are connected by a massless and inextensible string. The whole system

Consider a drop of rain water having mass 1 g falling from a height of 1 km. It hits the ground with a speed of 50 m s$$

Which of the following statements are correct ? (1)   Centre of mass of a body always coincides with the

A rope is wound around a hollow cylinder of mass 3 kg and radius 40 cm. What is the angular acceleration of the cylinder

Two discs of same moment of inertia rotating about their regular axis passing through centre and perpendicular to the pl

The acceleration due to gravity at a height at a height 1 km above the rearth is the same as at a depth d below the surf

Two astronauts are floating in gravitational free space after having lost contact with their spaceship. The two will

The bulk modulus of a spherical object is 'B'. If it is subjected to uniform pressure 'P', the fractional decrease in r

A U tube with both ends open to the atmosphere, is partially filled with water. Oil, which is immiscible with water, is

A spherical black body with a radius of 12 cm radiates 450 watt power at 500 K. If the radius were halved and the temper

Two rods A and B of different materials are welded together as shown in figure. Their thermal conductivities are K1 and

Thermodynamic processes are indicated in the following diagram. Match the following .tg {border-collapse:collapse;bor

A gas mixture consists of 2 moles of O2 and 4 moles of Ar at temperature T. Neglecting all vibrational modes, the total

A carnot engine having an efficiency of $${1 \over {10}}$$ as heat engine, is used as a refrigerator. If the work done o

A spring of force constant k is cut into lengths of ratio 1 : 2 : 3. They are connected in series and the new force cons

A particle executes linear simple harmonic motion with an amplitude of 3 cm. When the particle is at 2 cm from the mean

The two nearest harmonics of a tube closed at one end and open at other end are 220 Hz and 260 Hz. What is the fundament

Two cars moving in opposite directions approach each other with speed of 22 m s$$-$$1 and 16.5 m s$$-$$1 respectively. T

A capacitor is charged by a battery. The battery is removed and another identical unchanged capacitor is connected in pa

Suppose the charge of a proton and an electron differ slightly. One of them is $$-$$e, the other is (e + $$\Delta $$e).

The diagrams below show regions of equipotentials. A positive charge is moved from A to B in each diagram.

The resistance of a wire is 'R' ohm. If it is melted and stretched to 'n' times its original length. its new resistance

A potentiometer is an accurate and versatile device to make electrical measurements of EMF because the method involves

An arrangement of three parallel straight wires placed perpendicular to plane of paper carrying same current $$'I'$$ alo

If $$\theta $$1 and $$\theta $$2 be the apparent angles of dip observed in two vertical planes at right angles to each o

A 250-turn rectangular coil of length 2.1 cm and width 1.25 cm carries a current of 85 $$\mu $$A and subjected to a magn

A long solenoid of diameter 0.1 m has 2 $$ \times $$ 104 turns per meter. At the centre of the solenoid, a coil of 100 t

Figure shows a circuit that contains three identical resistors with resistance R = 9.0 $$\Omega $$ each, two identical i

In an electromagnetic wave in free space that root mean square value of the electric field is Erms = 6 V m$$-$$1. The pe

The ratio of resolving powers of an optical microscope for two wavelength $$\lambda $$1 = 4000 $$\mathop A\limits^ \circ

Young's double slit experiment is first performed in air and then in a medium other than air. It is found that 8th brigh

A beam of light from a source L is incident normally on a plane mirror fixed at a certain distance x from the source. Th

A thin prism having refracting angle 10o is made of glass of refractive infex 1.42. This prism is combined with another

Two polaroids P1 and P2 are placed with their axis perpendicular to each other. Unpolarised light $$I$$0 is incident on

The de-Broglie wavelength of a neutron in thermal equilibrium with heavy water at a temperature T (kelvin) and mass m, i

The photoelectric threshold wavelength of silver is 3250 $$ \times $$ 10$$-$$10 m. The velocity of the electron ejected

The ratio of wavelengths of the last line of Balmer series and the last line of Lyman series is

Radioactive material 'A' has decay constant '8 $$\lambda $$' and material 'B' has decay constant '$$\lambda $$'. Initial

Which one of the following represents forward bias diode ?

In a common emitter transistor amplifier the audio sgnal voltage across the collector is 3 V. The resistance of collecto

The given electrical network is equivalent to