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Root pressure develops due to:
Which one is a wrong statement?
Which of the following structures is not found in prokaryotic cells?
Which one of the following animals has two separate circulatory pathways?
Most animals that live in deep oceanic waters are:
An association of individuals of different species living in the same habitat and having functional interactions is:
The oxygen evolved during photosynthesis comes from water molecules. Which one of the following pairs of elements is involved in this reaction?
Axile placentation is present in:
In which of the following both pairs have correct combination:
In mammalian eye, the 'fovea' is the center of the visual field, where:
Choose the wrong statement:
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Which of the following are not membrane-bound?
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In which of the following interactions both partners are adversely affected?
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A colour blind man marries a woman with normal sight who has no history of colour blindness in her family. What is the probability of their grandson being colour blind?
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Ectopic pregnancies are referred to as:
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Cellular organelles with membranes are:
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Cell wall is absent in:
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The term "linkage" was coined by:
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Which of the following biomolecules does have a phosphodiester bond?
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The primary dentition in human differs from permanent dentition in not having one of the following types of teeth:
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A protoplast is a cell:
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In which group of organisms do the cell walls form two thin overlapping shells which fit together?
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The DNA molecules to which the gene of interest is integrated for cloning is called:
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Male gametophyte in angiosperms produces:
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Coconut water from a tender coconut is:
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The species confined to a particular region and not found elsewhere is termed as:
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Metagenesis refers to:
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The enzyme that is not present in succus entericus is:
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Eutrophication of water bodies leading to killing of fishes is mainly due to non-availability of:
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The function of the gap junction is to:
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Match the following list of microbes and their importance:
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Arrange the following events of meiosis in correct sequence: (a) Crossing over (b) Synapsis (c) Terminalisation of chiasmata (d) Disappearance of nucleolus
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The cutting of DNA at specific locations became possible with the discovery of:
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During biological nitrogen fixation, inactivation of nitrogenase by oxygen poisoning is prevented by:
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Grafted kidney may be rejected in a patient due to:
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The body cells in cockroach discharge their nitrogenous waste in the haemolymph mainly in the form of:
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Filiform apparatus is characteristic feature of:
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Acid rain is caused by increase in the atmospheric concentration of:
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The wheat grain has an embryo with one large, shield-shaped cotyledon known as:
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Among china rose, mustard, brinjal, potato, guava, cucumber, onion and tulip, how many plants have superior ovary?
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Which of the following is not a function of the skeletal system?
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Golden rice is a genetically modified crop plant where the incorporated gene is meant for biosynthesis of:
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Chromatophores take part in:
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Select the wrong statement:
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A pleiotropic gene:
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Human urine is usually acidic because:
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Auxin can be bioassayed by:
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Which of the following events is not associated with ovulation in human female?
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Body having meshwork of cells, internal cavities lined with food filtering flagellated cells and indirect development are the characteristics of phylum:
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Which one of the following hormones is not involved in sugar metabolism?
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Which of the following diseases is caused by a protozoan?
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Outbreeding is an important strategy of animal husbandry because it:
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A childless couple can be assisted to have a child through a technique called GIFT. The full form of this technique is:
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A jawless fish, which lays eggs in fresh water and whose ammocoetes larva after metamorphosis return to the ocean is:
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The structures that help some bacteria to attach to rocks and/or host tissues are:
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If you suspect major deficiency of antibodies in a person, to which of the following would you look for confirmatory evidence?
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In human females, meiosis-II is not completed until:
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Which of the following layers in an antral follicle is acellular?
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In his classic experiments on pea plants, Mendel did not use:
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Which one of the following fruits is parthenocarpic?
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In angiosperms, microsporogenesis and megasporogenesis:
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A gene showing codominance has:
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The chitinous exoskeleton of arthropods is formed by the polymerisation of:
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The imperfect fungi which are decomposers of litter and help in mineral cycling belong to:
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The wings of a bird and the wings of an insect are:
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Flowers are unisexual in:
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Increase in concentration of the toxicant at successive trophic levels is known as:
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Destruction of the anterior horn cells of the spinal cord would result in loss of:
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Roots play insignificant role in absorption of water in:
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Match the columns and identify the correct option:
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Identify the correct order of organisation of genetic material from largest to smallest:
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Which one of the following hormones, though synthesised elsewhere, is stored and released by the master gland?
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Read the different components from (a) to (d) in the list given below and identify the correct order of their arrangement from outer side to inner side in a woody dicot stem: (a) Secondary cortex (b) Wood (c) Secondary phloem (d) Phellem The correct order is :
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Which of the following joints would allow no movement?
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Which one of the following is not applicable to RNA?
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Doctors use a stethoscope to hear the sound produced during each cardiac cycle. The second sound is heard when:
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During ecological succession:
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In the following human pedigree, the filled symbols represent the affected individuals. Identify the type of given pedigree.
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Balbiani rings are sites of:
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Name the pulmonary disease in which alveolar surface area involved in gas exchange is drastically reduced due to damage in the alveolar walls.
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Which of the following are most suitable indicators of SO₂ pollution in the environment?
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Satellite DNA is important because it:
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Industrial melanism is an example of:
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A column of water within xylem vessels of tall trees does not break under its weight because of:
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The introduction of T-DNA into plants involves:
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Pick up the wrong statement:
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In photosynthesis, the light-independent reactions take place at:
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Which of the following immunoglobulins constitutes the largest percentage in human milk?
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Which of the following pairs is not correctly matched?
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The UN Conference of Parties on climate change in the year 2012 was held at:
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2,3-Dimethyl-2-butene can be prepared by heating which of the following compounds with a strong acid?
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Gadolinium belongs to 4f series. Its atomic number is 64. Which of the following is the correct electronic configuration of gadolinium?
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The formation of the oxide ion, , from an oxygen atom requires first an exothermic and then an endothermic step as shown below: Thus, the process of formation of O²⁻ in the gas phase is unfavourable even though O²⁻ is isoelectronic with neon. It is due to the fact that:
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The number of structural isomers possible for the molecular formula is:
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If the equilibrium constant for is K, the equilibrium constant for will be:
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Which one of the following pairs of solution is not an acidic buffer?
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Aqueous solution of which of the following compounds is the best conductor of electric current?
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Caprolactam is used for the manufacture of:
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On heating which of the following releases most easily?
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Strong reducing behaviour of is due to:
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Decreasing order of stability of , , and is:
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The number of water molecules is maximum in:
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In which of the following pairs, both the species are not isostructural?
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In the reaction with HCl, an alkene reacts in accordance with the Markovnikov's rule, to give a product 1-chloro-1-methylcyclohexane. The possible alkene is:
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Assuming complete ionization, same moles of which of the following compounds will require the least amount of acidified KMnO₄ for complete oxidation?
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Reaction of phenol with chloroform in presence of dilute sodium hydroxide finally introduces which one of the following functional groups?
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The vacant space in bcc lattice unit cell is:
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Which of the statements given below is incorrect?
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The name of complex ion, is:
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If Avogadro number is changed from to , this would change:
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Which of the following statements is not correct for a nucleophile?
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A gas such as carbon monoxide would be most likely to obey the ideal gas law at:
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The hybridization involved in complex is (Atomic number of Ni = 28):
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The heat of combustion of carbon to CO₂ is . The heat released upon formation of 35.2 g of CO₂ from carbon and oxygen gas is:
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20.0 g of a magnesium carbonate sample decomposes on heating to give carbon dioxide and 8.0 g magnesium oxide. What will be the percentage purity of magnesium carbonate in the sample? (Atomic weight: Mg = 24)
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What is the mole fraction of the solute in a 1.00 m aqueous solution?
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The correct statement regarding defects in crystalline solids is:
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The stability of +1 oxidation state among Al, Ga, In and Tl increases in the sequence:
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Two possible stereo-structures of , which are optically active, are called:
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The following reaction is known by the name:
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The sum of coordination number and oxidation number of the metal M in the complex (where en is ethylenediamine) is:
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Reaction of carbonyl compound with one of the following reagents involves nucleophilic addition followed by elimination of water. The reagent is:
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Which one of the following esters gets hydrolysed most easily under alkaline conditions?
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In an S1 reaction on chiral centres, there is:
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The rate constant of the reaction is 0.6 × 10⁻³ mole per second. If the concentration of A is 5 M, then concentration of B after 20 minutes is:
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What is the pH of the resulting solution when equal volumes of 0.1 M NaOH and 0.01 M HCl are mixed?
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Number of possible isomers for the complex will be (where en = ethylenediamine):
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The variation of the boiling points of the hydrogen halides is in the order HF > HI > HBr > HCl. What explains the higher boiling point of hydrogen fluoride?
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What is the mass of the precipitate formed when 50 mL of 16.9% solution of AgNO₃ is mixed with 50 mL of 5.8% NaCl solution? (Ag = 107.8, N = 14, O = 16, Na = 23, Cl = 35.5)
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The oxidation of benzene by in the presence of air produces:
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Which of the following is not the product of dehydration of the given alcohol?
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Method by which aniline cannot be prepared is:
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Which of the following reaction(s) can be used for the preparation of alkyl halides?
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Which is the correct order of increasing energy of the listed orbitals in the atom of titanium? (Atomic number )
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In the extraction of copper from its sulphide ore, the metal is finally obtained by the reduction of cuprous oxide with:
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In the spectrum of hydrogen, the ratio of the longest wavelength in the Lyman series to the longest wavelength in the Balmer series is:
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The energy of the electromagnetic waves is of the order of . To which part of the electromagnetic spectrum does it belong?
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An electron moves on a straight-line path XY as shown. The loop is placed adjacent to the path of the electron. What will be the direction of current, if any, induced in the loop?
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The cylindrical tube of a spray pump has radius , one end of which has fine holes, each of radius . If the speed of the liquid in the tube is , the speed of ejection of the liquid through the holes is:
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The Young's modulus of steel is twice that of brass. Two wires of the same length and same cross-sectional area, one of steel and another of brass, are suspended from the same roof. If the lower ends of the wires are to be at the same level, the weights added to the steel and brass wires must be in the ratio:
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A potentiometer wire of length and resistance are connected in series with a battery of e.m.f. and a resistance . An unknown e.m.f. is balanced at a length of the potentiometer wire. The e.m.f. will be:
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A particle is executing a simple harmonic motion. Its maximum acceleration is and maximum velocity is . Then, its time period of vibration will be:
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If vectors are functions of time, then the value of $t$ at which they are orthogonal to each other is:
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A source of sound emitting waves of frequency and an observer are located at some distance from each other. The source is moving with a speed of at an angle of with the source-observer line as shown in the figure. The observer is at rest. The apparent frequency observed by the observer (velocity of sound in air ) is:
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An automobile moves on a road with a speed of . The radius of its wheels is and the moment of inertia of a wheel about its axis of rotation is . If the vehicle is brought to rest in , the magnitude of average torque transmitted by its brakes to a wheel is:
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A rectangular coil of length and width having turns of wire is suspended vertically in a uniform magnetic field of strength . The coil carries a current of . If the plane of the coil is inclined at an angle of with the direction of the magnetic field, the torque required to keep the coil in stable equilibrium will be:
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A parallel plate air capacitor has capacitance 'C', distance of separation between plates is 'd' and potential difference 'V' is applied between the plates. The force of attraction between the plates of the parallel plate air capacitor is:
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Two vessels separately contain two ideal gases A and B at the same temperature, the pressure of A being twice that of B. Under such conditions, the density of A is found to be 1.5 times the density of B. The ratio of molecular weight of A and B is:
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A satellite is moving in an elliptical orbit around the Earth. The mass of the satellite is very small compared to the mass of the Earth. Then,
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In the given figure, a diode is connected to an external resistance and an e.m.f. of . If the barrier potential developed across the diode is , the current in the circuit will be:
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A remote-sensing satellite of Earth revolves in a circular orbit at a height of above the surface of Earth. If Earth's radius is and , then the orbital speed of the satellite is:
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The position vector of a particle as a function of time is given by: where R is in metres, t is in seconds and î and ĵ denote unit vectors along the x and y directions respectively. Which one of the following statements is wrong for the motion of the particle?
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A string is stretched between fixed points separated by . It is observed to have resonant frequencies of and . There are no other resonant frequencies between these two. The lowest resonant frequency for this string is:
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Point masses and are placed at the opposite ends of a rigid rod of length and negligible mass. The rod is to be set rotating about an axis perpendicular to it. The position of point on this rod through which the axis should pass so that the work required to set the rod rotating with angular velocity is minimum, is given by:
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At the first minimum adjacent to the central maximum of a single-slit diffraction pattern, the phase difference between the Huygens wavelet from the edge of the slit and the wavelet from the mid-point of the slit is:
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A force is acting at a point . The value of for which angular momentum about the origin is conserved is:
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Two particles A and B move with constant velocities and . At the initial moment their position vectors are and respectively. The condition for particles A and B to collide is:
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A nucleus of uranium decays at rest into nuclei of thorium and helium. Then:
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Two metal wires of identical dimensions are connected in series. If and are the conductivities of the metal wires respectively, the effective conductivity of the combination is:
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Light of wavelength is incident on a metal with work function . The de Broglie wavelength of the emitted electron is:
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sample of a gas occupies at NTP. The specific heat capacity of the gas at constant volume is . If the speed of sound in this gas at NTP is , then the heat capacity at constant pressure is: (Take gas constant R = 8.3 )
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A series R-C circuit is connected to an alternating voltage source. Consider two situations: (a) When the capacitor is air filled. (b) When the capacitor is mica filled. Current through the resistor is and voltage across the capacitor is . Then:
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A plank with a box on it at one end is gradually raised about the other end. As the angle of inclination with the horizontal reaches , the box starts to slip and slides down the plank in . The coefficients of static and kinetic friction between the box and the plank will be, respectively:
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Two stones of masses and are whirled in horizontal circles, the heavier one in a radius and the lighter one in radius . The tangential speed of the lighter stone is times that of the heavier stone when they experience the same centripetal force. The value of is:
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The coefficient of performance of a refrigerator is 5. If the temperature inside the freezer is , the temperature of the surroundings to which it rejects heat is:
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An ideal gas is compressed to half its initial volume by means of several processes. Which of the process results in the maximum work done on the gas?
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A ball is thrown vertically downwards from a height of with an initial velocity . It collides with the ground, loses of its energy in collision and rebounds to the same height. The initial velocity is: (Take )
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On a frictionless surface, a block of mass moving at speed collides elastically with another block of the same mass which is initially at rest. After collision the first block moves at an angle to its initial direction and has a speed . The second block's speed after the collision is:
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If potential (in volts) in a region is expressed as the electric field (in N/C) at the point (1, 1, 0) is:
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Two slits in Young's experiment have widths in the ratio . The ratio of intensity at the maxima and minima in the interference pattern, , is:
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The heart of a man pumps litres of blood through the arteries per minute at a pressure of of mercury. If the density of mercury is and , then the power of heart in watt is:
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A proton and an alpha particle both enter a region of uniform magnetic field , moving at right angles to the field. If the radii of circular orbits for both the particles are equal and the kinetic energy acquired by the proton is , then the energy acquired by the alpha particle will be:
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The input signal given to a CE amplifier having a voltage gain of 150 is The corresponding output signal will be:
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In dimension of critical velocity vc of liquid flowing through a tube are expressed as (ηˣ ρʸ rᶻ), where η, ρ and r are the coefficients of viscosity of liquid, density of liquid and radius of the tube respectively, then the values of x, y and z are given by:
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A circuit contains an ammeter, a battery of 30 V and a resistance 40.8 ohm all connected in series. If the ammeter has a coil of resistance 480 ohm and a shunt of 20 ohm, the reading in the ammeter will be :-
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Water rises to height in a capillary tube. If the length of capillary tube above the surface of water is made less than , then:
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In an astronomical telescope in normal adjustment, a straight black line of length is drawn on the inside part of the objective lens. The eyepiece forms a real image of this line. The length of this image is . The magnification of the telescope is:
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The value of coefficient of volume expansion of glycerin is . The fractional change in the density of glycerin for a rise of in its temperature is:
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A photoelectric surface is illuminated successively by monochromatic light of wavelength and . If the maximum kinetic energy of the emitted photoelectrons in the second case is 3 times that in the first case, the work function of the surface material is: ( = Planck's constant, = speed of light)
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A beam of light consisting of red, green and blue colours is incident on a right-angled prism. The refractive indices of the material of the prism for the red, green and blue wavelengths are 1.39, 1.44 and 1.47 respectively. The prism will:
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