Kranz anatomy is one of the characteristics of the leaves of

ABO blood grouping is controlled by gene I which has three alleles and show co-dominance. There are six genotypes. How many phenotypes in all are possible -

Secretions from which one of the following are rich in fructose, calcium and some enzymes?

In human female the blastocyst

Signals from fully developed foetus and placenta ultimately lead to parturition which requires the releas of

Vegetative propagation in Pistia occurs by

Select the answer with correct matching of the structure, its location and function.

The haemoglobin content per 100 ml of blood of a normal healthy human adult is

Given below are four statements (i-iv) regarding human blood circulatory system.
(i)  Arteries are thick-walled and have narrow lumen as compared to veins.
(ii)  Angina is acute chest pain when the blood circulation to the brain is reduced.
(iii)  Persons with blood group AB can donate blood to any person with any blood group under ABO system.
(iv)  Calcium ions play a very important role in blood clotting.
Which two of the above statements are correct?

Fastest distribution of some injectible material/medicine and with no risk of any kind can be achieved by injecting it into the

Root development is promoted by

One of the commonly used plant growth hormone in tea plantations is

Study the pedigree chart of a certain family given below and select the correct conculusion which can be drawn for the character –

Read the following four statements, (i), (ii), (iii) and (iv) and select the right opening having both correct statement.
Statements :
(i)    Z scheme of light reaction takes place in presence of PSI only.
(ii)   Only PSI is functional in cyclic photophosphorylation.
(iii)  Cyclic photophosphorylation results into synthesis of ATP and NADPH₂.
(iv)  Stroma lamellae lack PSII as well as NADP.

The figure given below shows the conversion of a substate into product by an enzyme. In which one of the four options (a-d) the components of reaction labelled as A, B, C and D are identified correctly?

Three of the following statements about enzymes are correct and one is wrong. Which one is wrong?

Consider the following four statements (i), (ii), (iii) and (iv) and select the right option for two correct statements.

Statements :
(i)  In vexillary aestivation, the large posterior petal is called-standard, two lateral ones are wings and two small anterior petals are termed keel.
(ii)  The floral formula for Liliaceae is

(iii)  In pea flower the stamens are monadelphous.
(iv)  The floral formula for Solanaceae is


The correct statements are

The correct floral formula of soyabean is

Which one of the following is a xerophytic plant in which the stem is modified into the flat green and succulent structure?

Crocodile and penguin are similar to whale and dogfish in which one of the following features?

In which one of the following organisms its excretory organs are correctly stated?

Which one of the following is monoecious?

Select the correct combination of the statements (i-iv) regarding the characteristics of certain organisms.
(i)  Methanogens are archaebacteria which produce methane in marshy areas.
(ii)  Nostoc is a filamentous blue-green alga which fixes atmospheric nitrogen.
(iii)  Chemosynthetic autotrophic bacteria synthesize cellulose from glucose.
(iv)  Mycoplasma lack a cell wall and can survive without oxygen.
The correct statements are

Black (stem) rust of wheat is caused by

Which one of the following is most appropriately defined ?

Examine the figures (A-D) given below and select the right option out of (a – d), in which all the four structures A, B, C and D are identified correctly.

Study the pathway given below: In which of the following options correct words for all the three blanks A, B and C are indicated?

Aestivation of petals in the flower of cotton is correctly shown in

Examine the figures A, B, C and D. In which one of the four options all the items A, B, C and D are correct?

Given below is the diagram of a bacteriophage. In which one of the options all the four parts A, B, C and D are correct?

Identify the components labelled A, B, C and D in the diagram below from the list (i) to (viii) given along with – Components :
(i) Cristae of mitochondria
(ii) Inner membrane of mitochondria
(iii) Cytoplasm
(iv) Smooth endoplasmic reticulum
(v) Rough endoplasmic reticulum
(vi) Mitochondrial matrix
(vii) Cell vacuole
(viii) Nucleus
The correct components are :

An elaborate network of filamentous proteinaceous structures present in the cytoplasm which helps in the maintenance of cell shape is called -

Which one of the following pairs of structures is correctly matched with their corrected description ?

Transport of food material in higher plants takes place through -

The Indian Rhinoceros is a natural inhabitant of which one of the Indian states ?

Which of the following representations shows the pyramid of numbers in a forest ecosystem ?

Which one of the following is now being commercially produced by biotechnological procedures ?

In genetic engineering, a DNA segment (gene) of interest,is transferred to the host cell through a vector. Consider the following four agents (A-D) in this regard and select the correct option about which one or more of these can be used as a vecotr / vectors –
(A) a bacterium
(B) plasmid
(C) plasmodium
(D) bacteriophage

An example of endomycorrhiza is -

A person suffering from a disease caused by Plasmodium, experiences recurring chill and fever at the time when

Which one of the following techniques is safest for the detection of cancers ?

The most apparent changes during the evolutionary history of Homo sapiens is traced in

Given below are four statements (A-D) each with one or two blanks. Select the option which correctly fills up the blanks in two statements
– Statements :
(A) Wings of butterfly and birds look alike and are the results of (i) , evolution
(B) Miller showed that CH₄, H₂, NH₃ and (i), when exposed to electric discharge in a flask resulted in formation of (ii) .
(C) Vermiform appendix is a (i) organ and an (ii) evidence pf evolution.
(D) According to Darwin evolution took place due to (i) and (ii) of the fittest.

Which one of the follwoing statements about the particular entity is true ?

In eukaryotic cell transcription, RNA splicing and RNA capping take place inside the -

The lac Operon consists of -

The 3'-5' phosphodiester linkages inside a polynucleotide chain serve to join -

In antirrhinum two plants with pink flowers were hybridized. The F₁ plants produced red, pink and white flowers in the proportion of 1 red, 2 pink and 1 white. What could be the genotype of the two plants used for hybridization ? Red flower colour is determined by RR, and White by rr genes -

A cross in which an organism showing a dominant phenotype in crossed with the recessive parent in order to know its genotype is called -

Which of the following oxidation states is the most common among the lanthanoids?

Which of the following conformers for ethylene glycol is most stable?

Match List I (substances) with List II (processes) employed in the manufacture of the substances and select the correct option.

Column $${\rm I}$$ (Substances)			Column $${\rm I}$$$${\rm I}$$ (Processes)
(A)	Sulphuric acid		(i)	Haber's process
(B)	Steel		(ii)	Bessemer's process
(C)	Sodium hydroxide		(iii)	Leblanc process
(D)	Ammonia		(iv)	Contact process

How many bridging oxygen atoms are present in P₄O₁₀?

The rate of the reaction, 2NO + Cl₂ $$ \to $$ 2NOCl is given by the rate equation rate = k[NO]²[Cl₂]. The value of the rate constant can be increased by

Consider the following relations for emf of an electrochemical cell
(i)   EMF of cell = (Oxidation potential of anode) $$-$$ (Reduction potential of cathode)
(ii)  EMF of cell = (Oxidation potential of anode) + (Reduction potential of cathode)
(iii) EMF of cell = (Reductional potential of anode) + (Reduction potential of cathode)
(iv) EMF of cell = (Oxidation potential of anode) $$-$$ (Oxidation potential of cathode)

Which of the above relations are correct?

Which of the following expressions correctly represents the equivalent conductance at infinite diluation of Al₂(SO₄)₃. Given that $$\mathop \Lambda \limits^ \circ $$_Al³⁺ and $$\mathop \Lambda \limits^ \circ $$_{so$$_4^{2 - }$$} are the equivalent conductances at infinite dilution of the respective ions?

Fructose reduces Tollen's reagent due to

Which one of the following compounds will be most readily dehydrated?

Match the compounds given in List I with their characteristic reactions given in List II. Select the correct option.

List I (Compounds)		List II (Reactions)
A.	CH3(CH2)3NH2	(i)	Alkaline hydrolysis
B.	CH3C$$ \equiv $$CH	(ii)	With KOH (alcohol) and CHCl3 produces bad smell
C.	CH3CH2COOCH3	(iii)	Gives white ppt. with ammoniacal AgNO3
D.	CH3CH(OH)CH3	(iv)	With Lucas reagent cloudiness appears after 5 minutes

When glycerol is treated with excess of HI, it produces

Following compounds are given


Which of the above compound(s), on being warmed with iodine solution and NaOH, will give iodoform?

In the following reaction

the product 'X' is

Which of the following species is not electrophilic in nature?

The IUPAC name of the compound
CH₃CH$$=$$CHC$$ \equiv $$CH is

The reaction,
2A_(g) + B_(g) $$\rightleftharpoons$$ 3C_(g) + D_(g)
is begun with the concentrations of A and B both at an initial value of 1.00 M. When equilibrium is reached, the concentration of D is measuread and found to be 0.25 M. The value for the equilibrium constant for this reaction is given by the expression

The following two reactions are known

Fe₂O_3(s) + 3CO_(g) $$ \to $$ 2Fe_(s) + 3CO_2(g); $$\Delta $$H = $$-$$ 26.8 kJ

FeO_(s) + CO(g) $$ \to $$  Fe_(s) + CO_2(g); $$\Delta $$H = $$-$$ 16.5 kJ

The value of $$\Delta $$H for the following reaction

Fe₂O_3(s) + CO_(g) $$ \to $$  2FeO_(s) + CO_2(g) is

For vaporization of water at 1 atmospheric pressure, the values of $$\Delta $$H and $$\Delta $$S are 40.63 kJ mol^$$-$$1 and 108.8 J K^$$-$$1 mol^$$-$$1, respectively. The temperature when Gibb's energy change ($$\Delta $$G) for this transformation will be zero, is

Three moles of an ideal gas expanded spontaneously into vacuum. The work done will be

Match List I (Equations) with List II (Type of processes) and select the correct option.

List I		List II
Equations		Type of processes
A.	Kp > Q	(i)	Non- spontaneous
B.	$$\Delta $$Go < RT ln Q	(ii)	Equilibrium
C.	Kp = Q	(iii)	Spontaneous and endothermic
D.	T > $${{\Delta H} \over {\Delta S}}$$	(iv)	Spontaneous

In which of the following molecules the central atom does not have sp³ hybridization?

Some of the properties of the two species, $$NO_3^ - $$ and $${H_3}{O^ + }$$ are described below. Which one of them is current?

Among the following which one has the highest cation to anion size ratio ?

Among the elements Ca, Mg, P and Cl, the order of increasing atomic radii is

A 0.66 kg ball is moving with a speed of 100 m/s. The associated wavelength will be

(h = 6.6 $$ \times $$ 10^$$-$$34 J s)

A current loop consists of two identical semicircular parts each of radius R, one lying in the x-y plane and the other in x-z plane. If the current in the loop is $$i$$. The resultant magnetic field due to the two semicircular parts at their common centre is

The following figure shows a logic gate circuit with two inputs A and B and the output Y. The voltage waveforms of A, B and Y are as given.



The logic gate is

The binding energy per nucleon in deuterium and helium nuclei are 1.1 MeV and 7.0 MeV, respectively. When two deuterium nuclei fuse to form a helium nucleus the energy released in the fusion is

The electron in the hydrogen atom jumps from excited state (n = 3) to its ground state (n = 1) and the photons thus emitted irradiate a photosensitive material. If the work function of the material is 5.1 eV, the stopping potential is estimated to be (the energy of the electron in n^th state E_n = $${{ - 13.6} \over {{n^2}}}eV$$)

When monochromatic radiation of intensity $$I$$ falls on a metal surface, the number of photoelectrons and their maximum kinetic energy are N and T respectively. If the intensity of radiation is 2$$I$$, the number of emitted electrons and their maximum kinetic energy are respectively

A rays of light is incident on a 60^o prism at the minimum deviation position. The angle of refraction at the first face (i.e., incident face) of the prism is

The speed of light in media M₁ and M₂ are 1.5 $$ \times $$ 10⁸ m/s and 2.0 $$ \times $$ 10⁸ m/s respectively. A ray of light enters from medium M₁ to M₂ at an incidence angle i. If the rays suffers total internal reflection, the value of i is

The electric field of an electromagnetic wave in free space is given by $$\overrightarrow E = 10\cos ({10^7}t + kx)\widehat j\,\,V/m,$$ where t and x are in seconds and metres respectively. It can be inferred that
(1)  the wavelength $$\lambda $$ is 188.4 m.
(2)  the wave number k is 0.33 rad/m.
(3)  the wave amplitude is 10 V/m.
(4)  the wave is propagating along +x direction.

Which one of the following pairs of statements is correct ?

A condenser of capacity C is charged to a potential difference of V₁. The plates of th condenser are then connected to an ideal inductor of inductance L. The current through the inductor when the potential difference across the condenser reduces to V₂ is

The magnetic moment of a diamagnetic action is

Two identical bar magnets are fixed with their centers at a distance d apart. A stationary charge Q is placed at P in between the gap of the two magnets at a distance D from the centre O as shown in the figure


The force on the charge Q is

A closely wound solenoid of 2000 turns and area of cross-section 1.5 $$ \times $$ 10^$$-$$4 m² carries a current of 2.0 A. It is suspended through its centre and perpendicular to its length, allowing it to turn in a horizontal plane in a uniform magnetic field 5 $$ \times $$ 10^$$-$$2 tesla making an angle of 30^o with the axis of the solenoid. The torque on the solenoid will be

A particle having a mass of 10^$$-$$2 kg carries a charge of 5 $$ \times $$ 10^$$-$$8 C. The particle is given an initial horizontal velocity of 10⁵ m s^$$-$$1 in the presence of electric field $$\overrightarrow E $$ and magnetic field $$\overrightarrow B $$. To keep the particle moving in a horizontal direction, it is necessary that
(1)  $$\overrightarrow B $$ should be perpendicular to the direction of velocity and $$\overrightarrow E $$ should be along the direction of velocity

(2)  Both $$\overrightarrow B $$ and $$\overrightarrow E $$ should be along the direction of velocity

(3)  Both $$\overrightarrow B $$ and $$\overrightarrow E $$ are mutually perpendicular and perpendicular to the direction of velocity.

(4)  $$\overrightarrow B $$ should be along the direction of velocity and $$\overrightarrow E $$ should be perpendicular to the direction of velocity

Which one of the following pairs of statements is possible ?

The electric field at a distance $${{3R} \over 2}$$ from the centre of a charged conducting spherical shell of radius R is E. The electric field at a distance $${R \over 2}$$ from the centre of the sphere is

Two parallel metal plates having charges +Q and $$-$$Q face each other at a certain distance between them. If the plates are now dipped in kerosene oil tank, the electric field between the plates will

A monatomic gas at pressure P₁ and volume V₁ is compressed adiabatically to $${{1 \over 8}^{th}}$$ of its original volume. What is the final pressure of the gas?

If c_p and c_v denote the specific heats (per unit mass of an ideal gas of molecular weight M, then

The dependence of acceleration due to gravity g on the distance r from the centre of the earth, assumed to be a sphere of radius R of uniform density is as shown in figures below



The correct figure is

(1)   Centre of gravity (C.G) of a body is the point at which the weight of the body acts
(2)   Centre of mass coincides with the centre of gravity if the earth is assumed to have infinitely large radius.
(3)   To evaluate the gravitational field intensity due to any body at an external point, the entire mass of the body can be considered to be concentrated at its C.G.
(4)   The radius of gyration of any body rotating about an axis is the length of the perpendicular dropped from the C.G. of the body to the axis.

Which one of the following pairs of statements is correct ?

The additional kinetic energy to be provided to a satellite of mass m revolving around a planet of mass M, to transfer it from a circular orbit of radius R₁ to another of radius R₂(R₂ > R₁) is

A thin circular ring of mass M and radius r is rotating about its axis with constant angular velocity $$\omega $$. Two objects each of msass m are attached gently to the opposite ends of a diameter of the ring. The ring now rotates with angular velocity given by

A solid cylinder and a hollow cylinder, both of the same mass and same external diameter are released from the same height at the same time on an inclined plane. Both roll down without slipping. Which one will reach the bottom first?

From a circular disc of radius R and mass 9M, a small disc of mass M and radius $${R \over 3}$$ is removed concentrically. The moment of inertia of the remaining disc about an axis perpendicular to the plane of the disc and passing through its centre is

A particle of mass M, starting from rest, undergoes uniform acceleration. If the speed acquired in time T is V, the power delivered to the particle is

A particle moves in x-y plane according to rule x = asin$$\omega $$t and y = acos$$\omega $$t. The particle follows

The speed of a projectile at its maximum height is half of its initial speed. The angle of projection is

A student measures the distance traversed in free fall of a body, initially at rest, in a given time. He uses this data to estimate g, the acceleration due to gravity. If the maximum percentage errors in measurement of the distance and the time are e₁ and e₂ respectively, the percentage error in the estimation of g is