Variations caused by mutation, as proposed by Hugo de Vries, are :

What is the genetic disorder in which an individual has an overall masculine development, gynaecomastia, and is sterile?

What map unit (Centimorgan) is adopted in the construction of genetic maps?

A gene locus has two alleles A, a. If the frequency of dominant allele A is 0.4, then what will be the frequency of homozygous dominant, heterozygous and homozygous recessive individuals in the population?

Select the incorrect statement.

Purines found both in DNA and RNA are:

Expressed Sequence Tags (ESTs) refers to :

Match the following genes of the Lac operon with their respective produces :

(a) i gene	(i) $$\beta $$-galactosidase
(b) z gene	(ii) Permease
(c) a gene	(iii) Repressor
(d) y gene	(iv) Transacetylase

Select the correct option.

The shorter and longer arms of a submetacentric chromosome are referred to as:

Which of the following features of genetic code does allow bacteria to produce human insulin by recombinant DNA technology?

Under which of the following conditions will there be no change in the reading frame of following mRNA?

5' AACAGCGGUGCUAUU 3'

The concept of ''Omnis cellula-e cellula'' regarding cell division was first proposed by :

The frequency of recombination between gene pairs on the same chromosome as a measure of the distance between genes was explained by :

Match the hominids with their correct brain size :

(a) Homo habilis	(i) 900 cc
(b) Homo neanderthalensis	(ii) 1350 cc
(c) Homo erectus	(iii) 650-800 cc
(d) Homo sapiens	(iv) 1400 cc

Select the correct option.

Identify the correct pair representing the causative agent of typhoid fever and the confirmatory test for typhoid.

In a species, the weight of newborn ranges from 2 to 5 kg. 97% of the newborn with an average weight between 3 to 3.3 kg survive whereas 99% of the infants born with weights from 2 to 2.5 kg or 4.5 to 5kg die. Which type of selection process is taking place?

Colostrum, the yellowish fluid, secreted by mother during the initial days of lactation is very essential to impart immunity to the newborn infants because it contains :

Which of the following sexually transmitted diseases is not completely curable ?

Which of the following immune responses is responsible for rejection of kidney graft?

Drug called ‘Heroin’ is synthesized by :

What triggers activation of protoxin to active Bt toxin of Bacillus thuringiensis in boll worm?

Which one of the following statements regarding post-fertilization development in flowering plants is incorrect?

Which of the following factors is responsible for the formation of concentrated urine?

Select the correct option :

What would be the heart rate of a person if the cardiac output is 5L, blood volume in the ventricles at the end of diastole is 100 mL and at the end of ventricular systole is 50 mL ?

Use of an artificial kindney during hemodialysis may result in :

(a) Nitrogenous waste build-up in the body
(b) Non –elimination of excess potassium ions
(c) Reduced absorption of calcium ions from gastro-intestinal tract
(d) Reduced RBC production

Which of the following options is the most appropriate?

Which part of the brain is responsible for thermoregulation?

Which of the following muscular disorders is inherited?

Which of the following statements in correct?

Match the following hormones with the respective disease :

(a) Insulin	(i) Addison’s disease
(b) Thyroxin	(ii) Diabetes insipidus
(c) Corticoids	(iii) Acromegaly
(d) Growth Hormones	(iv) Goitre
	(v) Diabetes mellitus

Select the correct option.

How does steroid hormone influence the cellular activities?

Which of the following statement is incorrect?

In some plants, the female gamete develops into embryo without fertilization. This phenomenon is known as :

Pinus seed cannot germinate and establish without fungal association. This is because :

Placentation, in which ovules develop on the inner wall of the ovary or in peripheral part, is :

Persistent nucellus in the seed is known as

Extrusion of second polar body from egg nucleus occurs :

What is the fate of the male gametes discharged in the synergid?

Which of the following contraceptive methods do involve a role of hormone?

Select the correct sequence for transport of sperm cells in male reproductive system :

Select the horomone-releasing Intra-Uterine Devices.

In Antirrhinum (Snapdragon), a red flower was crossed with a white flower and in F₁ generation, pink flowers were obtained. When pink flowers were selfed, the F₂ generation showed white, red and pink flowers. Choose the incorrect statement from the following :

Which of the following is the most important cause for animals and plants being driven to extinction?

Select the correct group of biocontrol agents.

Match the following organisms with the products they produce :

(a) Lactobacillus	(i) Cheese
(b) Saccharomyces cerevisiae	(ii) Curd
(c) Aspergillus nige	(iii) Citric Acid
(d) Acetobacter aceti	(iv) Bread
	(v) Acetic Acid

Select the correct option.

Thiobacillus is a group of bacteria helpful in carrying out :

Which of the following can be used as a biocontrol agent in the treatment of plant disease?

DNA precipitation out of a mixture of bimolecules can be achieved by treatment with :

Which of the following is a commercial blood cholesterol lowering agent?

Following statements describe the characteristics of the enzyme Restriction Endonuclease. Identify the incorrect statement.

Which of the following glucose transporters is insulin-dependent?

The Earth summit held in Rio de Janeiro in 1992 was called :

Match Column-I with Column –II.

Column - I	Column - II
(a) Saprophyte	(i) Symbiotic association or fungi with plant roots
(b) Parasite	(ii) Decomposition of dead organic materials
(c) Lichens	(iii)Living on living plants of animals
(d) Mycorrhiza	(iv) Symbiotic association of algae and fungi

Choose the correct answer from the options given below :

Respiratory Quotient (RQ) value of tripalmitin is :

Which of the following ecological pyramids is generally inverted?

Which one of the following is not a method of in situ conservation of biodiversity?

Concanavalin A is :

From evolutionary point of view, retention of the female gametophyte with developing young embryo on the parent sporophyte for some time, is first observed in :

Grass leaves curl inward during very dry weather. Select the most appropriate reason from the following :

Phloem in gymnosperms lacks :

Match the following organisms with their respective characteristics:

(a)	Pila	(i)	Flame cells
(b)	Bombyx	(ii)	Comb plates
(c)	Pleurobrachia	(iii)	Radula
(d)	Taenia	(iv)	Malpighian

Select the correct option from the following :

What is the direction of movement of sugars in phloem?

Which of the statements given below is not true about formation of Annual Rings in trees?

Select the correct sequence of organs in the alimentary canal of cockroach starting from mouth :

Which of the following pair of organelles does not contains DNA?

The correct sequence of phases of cell cycle is :

Which of the following statements regarding mitochondria is incorrect?

Select the correctly written scientific name of Mango which was first described by Carolus Linnaeus :

Consider the following statements :

(A) Coenzyme of metal ion that is tightly bound to enzyme protein is called prosthetic group.
(B) A complete catalytic active enzyme with its bound prosthetic group is called apoenzyme

Select the correct option

Cells in G₀ phase :

What is the site of perception of photoperiod necessary for induction of flowering in plants?

The ciliated epithelial cells are required to move particles or mucus in a specific direction. In humans, these cells are mainly present in :

Which of the following statements is not correct?

Conversion of glucose to glucose-6 phosphate, the first irreversible reaction of glycolysis, is catalyzed by

Match the Column-I with Column-II :
Select the correct option.

Tidal Volume and Expiratory Reserve Volume of an athlete is 500 mL and 1000 mL respectively. What will be his Expiratory Capacity if the Residual Volume is 1200 mL?

Which of the following statements is incorrect?

Consider following features:

(a) Organ system level of organisation
(b) Bilateral symmetry
(c) True coelomates with segmentation of body

Select the correct option of animal groups which possess all the above characteristics

Identify the incorrect statement related to PCl₅ from the following :

An alkene “A” on reaction with O₃ and Zn + H₂O gives propanone and ethanal in equimolar ratio. Addition of HCl to alkene “A” gives “B” as the major product. The structure of product “B” is :

Which is the correct thermal stability order for H₂E (E = O, S, Se, Te and Po)?

For a cell involving one electron $$E_{cell}^\Theta $$ = 0.59 V at 298 K, the equilibrium constant for the cell reaction is :

[Given that $${{2.303RT} \over F}$$ = 0.059 V at T = 298 K ]

For an ideal solution, the correct option is :

For the cell reaction
2Fe³⁺(aq) + 2I^– (aq) $$ \to $$ 2Fe²⁺(aq) + I₂(aq)
$${E_{cell}^\Theta }$$ = 0.24 V at 298 K. The standard Gibbs energy ($$\Delta $$_rG^o) of the cell reaction is :
[Given that Faraday constant F = 96500 C mol^–1]

If the rate constant for a first order reaction is k, the time (t) required for the completion of 99 % of the reaction is given by :

For the chemical reaction
N₂(g) + 3H₂(g) ⇌ 2NH₃(g)
the correct option is :

The most suitable reagent for the following conversion, is :

Match the following :

(a) Pure nitrogen	(i) Chlorine
(b) Haber process	(ii) Sulphuric acid
(c) Contact process	(iii) Ammonia
(d) Deacon’s process	(iv) Sodium azide or Barium azide

Which of the following is the correct option?

Match the Xenon compounds in Column-I with its structure in Column-II and assign the correct code :

The correct order of the basic strength of methyl substituted amines in aqueous solution is :

What is the correct electronic configuration of the central atom in K₄[Fe(CN)₆] based on crystal field theory?

The structure of intermediate A in the following reaction, is :

The major product of the following reaction is :

The non-essential amino acid among the following is :

The mixture that forms maximum boiling azeotrope is :

The compound that is most difficult to protonate is :

Among the following, the reaction that proceeds through an electrophilic substitution, is :

The number of moles of hydrogen molecules required to produce 20 moles of ammonia through Haber’s process is :

Conjugate base for Bronsted acids H₂O and HF are :

Which of the following series of transitions in the spectrum of hydrogen atom falls in visible region?

4d, 5p, 5f and 6p orbitals are arranged in the order of decreasing energy. The correct option is :

For the second period elements the correct increasing order of first ionization enthalpy is :

The number of sigma ($$\sigma $$) and pi ($$\pi $$) bonds in pent-2-en-4-yne is -

The manganate and permanganate ions are tetrahedral due to :

The correct structure of tribromooctaoxide is :

Which of the following diatomic molecular species has only $$\pi $$ bonds according to Molecular Orbital Theory?

In which case change in entropy is negative?

Under isothermal condition, a gas at 300 K expands from 0.1 L to 0.25 L against a constant external pressure of 2 bar. The work done by the gas is [Given that 1 L bar = 100 J]

pH of a saturated solution of Ca(OH)₂ is 9. The solubility product (K_sp) of Ca(OH)₂ is :

Which will make basic buffer?

Which of the following reactions are disproportionation reaction?

(a) 2Cu⁺ $$ \to $$ Cu²⁺ + Cu⁰
(b) 3MnO₄²⁺ + 4H⁺ $$ \to $$ 2MnO₄^- + MnO₂ + 2H₂O
(c) 2KMnO₄ $$\buildrel \Delta \over \longrightarrow $$ K₂MnO₄ + MnO₂ + O₂
(d) 2MnO₄^- + 3Mn²⁺ + 2H₂O $$ \to $$ 5MnO₂ + 4$${H^ \oplus }$$

Select the correct option from the following :

Which of the following is incorrect statement?

Which of the following species is not stable?

A small hole of area of cross-section 2 mm² present near the bottom of a fully filled open tank of height 2 m. Taking g = 10 m/s², the rate of flow of water through the open hole would be nearly :

Ionized hydrogen atoms and $$\alpha $$-particles with same momenta enters perpendicular to a constant magnetic field, B. The ratio of their radii of their paths r_H : r_{$$\alpha $$} will be :

When a block of mass M is suspended by a long wire of length L, the length of the wire becomes (L + $$l$$). The elastic potential energy stored in the extended wire is :

The work done to raise a mass m from the surface of the earth to a height h, which is equal to the radius of the earth, is :

In total internal reflection when the angle of incidence is equal to the critical angle for the pair of media in contact, what will be angle of refraction?

For a p-type semiconductor, which of the following statements is true?

Two point charges A and B, having charges +Q and – Q respectively, are placed at certain distance apart and force acting between them is F. If 25% charge of A is transferred to B, then force between the charges becomes :

$$\alpha $$-particale consists of :

Body A of mass 4m moving with speed u collides with another body B of mass 2 m, at rest. The collision is head on and elastic in nature. After the collision the fraction of energy lost by the colliding body A is :

A body weight 200 N on the surface of earth. How much will it weight half way down to the centre of the earth?

Pick the wrong answer in the context with rainbow.

A disc of radius 2 m and mass 100 kg rolls on a horizontal floor. Its centre of mass has speed of 20 cm/s. How much work is needed to stop it?

Two particles A and B are moving in uniform circular motion in concentric circles of radii r_A and r_B with speed v_A and v_B respecitively. Their time period of rotation is the same. The ratio of angular speed of A to that of B will be :

A parallel plate capacitor of capacitance 20 $$\mu $$F is being charged by a voltage source whose potential is changing at the rate of 3V/s. The conduction current through the connecting wires, and the displacement current through the plates of the capacitor, would be, respectively :

When an object is shot from the bottom of a long smooth inclined plane kept at an angle 60^o with horizontal, it can travel a distance x₁ along the plane. But when the inclination is decreased to 30^o and the same object is shot with the same velocity, it can travel x₂ distance. Then x₁ : x₂ will be :

The unit of thermal conductivity is :

The total energy of an electron in an atom in an orbit is –3.4 eV. Its kinetic and potential energies are, respectively.

Which of the following acts as a circuit protection device?

A soap bubble, having radius of 1 mm, is blown from a detergent solution having a surface tension of 2.5 $$ \times $$ 10^–2 N/m. The pressure inside the bubble equals at a point Z₀ below the free surface of water in a container. Taking g = 10 m/s², density of water = 10³ kg/m³, the value of Z₀ is :

Two similar thin equi-convex lenses, of focal length f each, are kept coaxially in contact with each other such that the focal length of the combination is F₁. When the space between the two lenses is filled with glycerin (which has the same refractive index (m = 1.5) as that of glass) then the equivalent focal length is F₂. The ratio F₁ : F₂ will be :

In which of the following devices, the eddy current effect is not used?

Two parallel infinite line charges with linear charge densities +$$\lambda $$ C/m and -$$\lambda $$ C/m are placed at a distance of 2R in free space. What is the electric field mid-way between the two line charges?

A particle moving with velocity $$\overrightarrow V $$ is acted by three forces shown by the vector triangle PQR. The velocity of the particle will :

The radius of circle, the period of revolution, initial position and sense of revolution are indicated is the figure.

y- projection of the radius vector of rotating particle P is :

A force F = 20 + 10y acts on a particle in y-direction where F is in newton and y in meter. Work done by this force to move the particle from y = 0 to y = 1 m is :

A hollow metal sphere of radius R is uniformly charged. The electric field due to the sphere at a distance r from the centre :

At a point A on the earth’s surface the angle of dip, $$\delta $$ = + 25^o. At a point B on the earth's surface the angle of dip, $$\delta $$ = – 25^o. We can interpret that :

Six similar bulbs are connected as shown in the figure with a DC source of emf E, and zero internal resistance.

The ratio of power consumption by the bulbs when (i) all are glowing and (ii) in the situation when two from section A and one from section B are glowing, will be :

In which of the following processes, heat is neither absorbed nor released by a system?

In a double slit experiment, when light of wavelength 400 nm was used, the angular width of the first minima formed on a screen placed 1m away, was found to be 0.2^o. What will be the angular width of the first minima, ($$\mu $$_water = 4/3) if the entire experimental apparatus is immersed in water?

A cylinderical conductor of radius R is carrying a constant current. The plot of the magnitude of the magnetic field. B with the distane d from the centre of the conductor, is correctly represented by the figure :

In the circuits shown below, the readings of voltmeters and the ammeters will be :

Which colour of the light has the longest wavelength?

Increase in tempertaure of a gas filled in a container would lead to :

Average velocity of a particle executing SHM in one complete vibration is :

A solid cylinder of mass 2 kg and radius 4 cm is rotating about its axis at the rate of 3 rpm. The torque required to stop after 2$$\pi $$ revolutions is :

A 800 turn coil of effective area 0.05 m² is kept. perpendicular to a magnetic filed 5 × 10^–5 T. When the plane of the coil is rotated by 90^o around any of its coplanar axis in 0.1 s, the emf induced in the coil will be :

A block of mass 10 kg is in contact against the inner wall of a hollow cylindrical drum of radius 1 m. The coefficient of friction between the block and the inner wall of the cylinder is 0.1. The minimum angular velocity needed for the cylinder to keep the block stationary when the cylinder is vertical and rotating about its axis, will be : (g = 10 m/s²)

The speed of a swimmer in still water is 20 m/s. The speed of river water is 10 m/s and is flowing due east. If he is standing on the south bank and wishes to cross the river along the shortest path, the angle at which he should make his strokes w.r.t. north is given by :

The displacement of a particle executing simple harmonic motion is given by

y = A₀ + A sin$$\omega $$t + B cos$$\omega $$t.

Then the amplitude of its oscillation is given by :

In an experiment, the percentage of error occurred in the measurement of physical quantities A, B, C and D are 1%, 2 %, 3 %and 4 % respectively. Then the maximum percentage of error in the measurement X, where
X = $${{{A^2}{B^{1/2}}} \over {{C^{1/3}}{D^3}}}$$, will be :

An electron is accelerated through a potential difference of 10,000 V. Its de Broglie wavelength is (nearly) : (m_e = 9 $$ \times $$ 10^–31 kg)

A mass m is attached to a thin wire and whirled in a vertical circle. The wire is most likely to break when :

A copper rod of 88 cm and an aluminium rod of unknown length have their increase in length independent of increase in tmperature. The length of aluminium rod is : ($$\alpha $$_Cu = 1.7 × 10^–5 K^–1 and $$\alpha $$_Al = 2.2 × 10^–5 K^–1)

The correct Boolean operation represented by the circuit diagram drawn is :