Which one of the following statements is correct?

The pineapple which under natural condition is difficult to blossom has been made to produce fruits throughout the year

Select the option which shows correct matching of animal with its excretory organ and excretory product.

During muscle contraction in humans, the

Select the correct statement with respect to disorders of muscles in humans.

Select the option which correctly matches the endocrine gland with its hormone and its function.

Norepinephrine (i)  is released by sympathetic fibres (ii)  is released by parasympathetic fibers (

Which of the following represents the action of insulin?

Animal vectors are required for pollination in

Albuminous seeds store their reserve food mainly in

Megaspores are produced from the megaspore mother cells after

Which of the following statements is correct?

The foetal ejection reflex in humans triggers the release of

In our society women are blamed for producing female children. Choose the correct answer for the sex-determination in hu

The stage transferred into the uterus after induced fertilization of ovum in the laboratory is

One of the following is not a method of contraception. Which one?

Down's syndrome in humans is due to :

Which one is the incorrect statement with regards to the importance of pedigree analysis?

The figure gives an important concept in the genetic implication of DNA . Fill the blanks A, B and C.

Which of the following is not a property of the genetic code ?

Inflorescence is racemose in

Which one of the following is true for fungi?

Syngamy can occur outside the body of the organism in

What is common in all the three, Funaria, Dryopteris and Ginkgo?

Which one of the following is wrongly matched?

The plant body is thalloid in

Which one of the following groups of animals reproduces only by sexual means?

Which one of the following is one of the paths followed by air or O2 during respiration in the adult male Periplaneta am

Which one of the following animals is correctly matched with its one characteristic and the taxon?

Sharks and dogfishes differ from skates and rays because

The characteristics of Class Reptilia are

Satellite RNA are present in some :

Among flowers of Calotropis, tulip, Sesbania, Asparagus, Colchicum, sweet pea, Petunia, Indigofera, mustard, soybean, t

How many plants among China rose, Ocimum, sunflower, mustard, Alstonia, guava, Calotropis and Nerium (oleander) have opp

In a cymose inflorescence the main axis

Uridine, present only in RNA is a

Which of the following statements about enzymes is wrong?

The figure shows a hypothetical tetrapeptide portion of a protein with parts labelled A - D. Which one of the following

During meiosis I, the chromosomes start pairing at

During the metaphase stage of mitosis, spindle fibres attach to chromosomes at

Identify the tissue shown in the diagram and match with its characteristics and its location :-

When man eats fish which feeds on zooplankton which have eaten small plants, the producer in the chain is :

The largest tiger reserve in India is :-

Which organization publishes the 'Red Data Book' ?

Which of the following has maximum genetic diversity in India?

Meristematic tissue responsible for increase in girth of tree trunk is :

Which of the following statements is not true for stomatal apparatus ?

Bundle sheath cells :

Select the correct option with respect to Cockroaches :-

Which two distinct microbial processes are responsible for the release of fixed nitrogen as dinitrogen gas (N2) to the a

The term 'glycocalyx' is used for :

Which of the following best illustrates "FEEDBACK" in development ?

Which of the following types of plastids does not contain stored food material ?

Select the alternative giving correct identification and function of the organelle 'A' in the diagram

A stage of mitosis is shown in the diagram. Which stage is it and what are its characteristics?

The figure shows a human blood cell. Identify it and give its characteristics.

The figure shows blood circulation in humans with labels A to D. Select the option which gives correct identification of

The figure shows an axon terminal and synapse. Select the option giving correct identification of labels A-D.

A sagittal section of human brain is shown here. Identify at least two labels from A-D.

The figure shows a section of human ovary. Select the option which gives the correct identification of either A or B wit

Genes of interest can be selected from a genomic library by using :

In an inducible operon, the genes are :

One of the most frequently used techniques in DNA fingerprinting is :-

Random undirectional change in allele frequencies that occur by chance in all populations and especially in small popula

Genetic variation in a population arises due to :

Dinosaurs dominated the World in which of the following geological era ?

The finch species of Galapagos Islands are grouped according to their food sources. Which of the following is not a finc

Which one of the following statements is correct regarding Sexually Transmitted Diseases (STD) ?

Identify the site where Wuchereria bancrofti is normally found on human body :

Which one of the following is a hallucinogenic drug?

Why is a capsule advantageous to a bacterium?

Tissue culture technique can produce infinite number of new plants from a small parental tissue. The economic importance

Which of the following statements is not true about somatic embryogenesis ?

Microbe used for biocontrol of pest butterfly caterpillars is :

During the process of isolation of DNA, chilled ethanol is added to :

Which one of the following vectors is used to replace the defective gene in gene therapy ?

RNA interference involves :-

The age pyramid with broad base indicates :

Which one of the following is not a parasitic adaptation ?

Benthic organisms are affected most by :

Which one of the following is a primary consumer in maize field ecosystem ?

The common characteristics between tomato and potato will be maximum at the level of their

In an experiment it showed that 10 mL of 0.05 M solution of chloride required 10 mL of 0.1 M solution of AgNO3, which of

On hydrolysis of a ''compound'', two compounds are obtained. One of which one treatment with sodium nitrite and hydrochl

Some reactions of amines are given. Which one is not correct?

In DNA, the linkages between different nitrogenous bases are

Which condition is not satisfied by an ideal solution?

How many gram of cobalt metal will be deposited when a solution of cobalt (II) chloride is electrolyzed with a current o

Consider the half-cell reduction reaction Mn2+ + 2e$$-$$ $$ \to $$ Mn, Eo = $$-$$1.18 V Mn2+ $$ \to $$ Mn3+ + e$$-$$,

For a reaction between A and B the order with respect to A is 2 and the other with respect to B is 3. The concentrations

A reaction is 50% complete in 2 hours and 75% complete in 4 hours. The order of reaction is

Which statement is wrong?

Identify the incorrect statement, regarding the molecule XeO4 :

Number of isomeric alcohols of molecular formula C6H14O which give positive iodoform test is

Sc (Z = 21) is a transition element but Zn (Z = 30) is not because

In a particular isomer of [Co(NH3)4Cl2]o, the Cl$$-$$Co$$-$$Cl angle is 90o, this isomer is known as

Crystal field splitting energy for high spin d4 octahedral complex is

The anion of acetylacetone (acac) forms Co (acac)3 chelate with Co3+. The rings of the chelate are

Which is diamagnetic?

Which among the following is a paramagnetic complex?

The correct IUPAC name for [CrF2(en)2]Cl is

Accumulation of lactic acid (HC3H5O3), a monobasic acid in tissues leads to pain and a feeling of fatigue. In a 0.10 M a

The outer electronic configuration of Gd (At. No. 64) is

According to law of photochemical equivalence the energy absorbed (in ergs/mole) is given as (h = 6.62 $$ \times $$ 10$$

Which one of the following arrangements represents the correct order of least negative to most negative electron gain en

The pair of species that has the same bond order in the following is

In which of the following pair both the species have sp3 hybridization ?

The outer orbitals of C in ethane molecule can be considered to be hybridized to give three equivalent sp2 orbitals. The

In which of the following ionization processes the bond energy increases and the magnetic behaviour changes from paramag

When 5 litres of a gas mixture of methane and propane is perfectly combusted at 0oC and 1 atmosphere, 16 litres of oxyge

Three thermochemical equations are given below (i)  C(graphite) + O2(g) $$ \to $$ CO2(g); $$\De

At 100oC the Kw of water is 55 times its value at 25oC. What will be the pH of neutral solution? (log 55 = 1.74)

The values of Ksp of CaCO3 and CaC2O4 are 4.7 $$ \times $$ 10$$-$$9 and 1.3 $$ \times $$ $$-$$9 respectively at 25oC. I

The dissociation constant of weak acid is 1 $$ \times $$ 10$$-$$4. In order to prepare a buffer solution with a pH = 5,

Arrange the following in increasing order of stability

What is the hybridisation state of benzyl carbonium ion?

Nitrogen detection in an organic compound is carried out by Lassaigne's test. The blue colour formed corresponds to whic

Homolytic fission of the following alkanes forms free radicals CH3 $$-$$ CH3, CH3 $$-$$ CH2 $$-$$ CH3, (CH3)2CH $$-$$ CH

Which of the following chemical system is non aromatic ?

In the following reaction : Product 'P' will not give

Given : I and II are

A parallel beam of light of wavelength $$\lambda $$ is incident normally on a narrow slit. A diffraction pattern formed

An electric dipole of dipole moment p is aligned parallel to a uniform electric field E. The energy required to rotate t

Two rods are joined end to end, as shown. Both have a cross-sectional area of 0.01 cm2. Each is 1 meter long. One rod is

A 12 cm wire is given a shape of a right angled triangle ABC having sides 3 cm, 4 cm and 5 cm as shown in the figure. Th

Ten identical cells connected in series are needed to heat a wire of length one meter and radius 'r' by 10oC in time 't'

A long straight wire carries a certain current and produces a magnetic field 2 $$ \times $$ 10$$-$$4 Wb m$$-$$2 at a per

A circular coil ABCD carrying a current 'i' is placed in a uniform magnetic field. If the magnetic force on the segment

A bar magnet of magnetic moment M is placed at right angles to a magnetic induction B. If a force F is experienced by ea

The primary of a transformer when connected to a dc battery of 10 Volt draws a current of 1 mA. The number of turns of t

A current of 2.5 A flows through a coil of inductance 5 H. The magnetic flux linked with the coil is

An electromagnetic wave of frequency $$\upsilon = 3.0$$ MHz passes from vaccum into a dielectric medium with relative p

In Young's double slit experiment the distance between the slits and the screen is doubled. The separation between the s

A charge q is placed at the centre of the line joining two equal charges Q. The system of the three charges will be in e

Two plane mirrors are inclined at 70o. A ray incident on one mirror at angle, $$\theta $$ after reflection falls on seco

The reddish appearance of the sun at sunrise and sunset is due to

A source of light is placed at a distance of 50 cm from a photo cell and the stopping potential is found to be V0. If th

The de-broglie wavelength of neutrons in thermal equilibrium at temperature T is

How does the Binding Energy per nucleon vary with the increase in the number of nucleons ?

An electron in hydrogen atom makes a transition n1 $$ \to $$ n2 where n1 and n2 are principal quantum numbers of the two

The output from a NAND gate is divided into two in parallel and fed to another NAND gate. The resulting gate is a

In an unbiased p-n junction, holes diffuse from the p-region to n-region because of

One way in which the operation of a n-p-n transistor differs from that of a p-n-p

Two metal rods 1 and 2 of same lengths have same temperature difference between their ends. Their thermal conductivities

The displacement 'x' (in meter) of a particle of mass 'm' (in kg) moving in one dimension under the action of a force, i

Vectors $$\overrightarrow A ,\overrightarrow B $$ and $$\overrightarrow C $$ are such that $$\overrightarrow A .\overrig

A car is moving in a circular horizontal track of radius 10 m with a constant speed of 10 m/s. A bob is suspended from t

A person holding a rifle (mass of person and rifle together is 100 kg) stands on a smooth surface and fires 10 shots hor

A particle with total energy E is moving in a potential energy region U(x). Motion of the particle is restricted to the

One coolie takes 1 minute to raise a suitcase through a height of 2 m but the second coolie takes 30 s to raise the same

The ratio of radii of gyration of a circular ring and a circular disc, of the same mass and radius, about an axis passin

Two discs are rotating about their axes, normal to the discs and passing through the centres of the discs. Disc D1 has 2

The radius of a planet is twice the radius of earth. Both have almost equal average mass densities. VP and VE are escape

A particle of mass 'm' is kept at rest at a height 3R from the surface of earth, where 'R' is radius of earth and 'M' is

If the ratio of diameters, lengths and Young's modulus of steel and copper wires shown in the figure are p, q and s resp

A fluid is in streamline flow across a horizontal pipe of variable area of cross section. For this which of the followin

The density of water at 20oC is 998 kg/m3 and at 40oC is 992 kg/m3. The coefficient of volume expansion of water is

Which of the following relations does not give the equation of an adiabatic process, where terms have their usual meanin

A system is taken from state a to state c by two paths adc and abc as shown in the figure. The internal energy at a is $

Two Carnot engines A and B are operated in series. The engine A receives heat from the source at temperature T1 and reje

In a vessel, the gas is at pressure P. If the mass of all the molecules is halved and their speed is doubled, then the r

A particle of mass m oscillates along x-axis according to equation x = asin$$\omega $$t. The nature of the graph between

The length of the wire between two ends of a sonometer is 100 cm. What should be the positions of two bridges below the

The pair of quantities having same dimensions is