The eye of octopus and eye of cat show different patterns of structure, yet they perform similar function. This is an example of:
NEET 2013
For the following questions answer them individually
Select the correct statement with respect to locomotion in humans:
A phosphoglycerideis always madeupof:
Perisperm differs from endosperm in :
A sedentary sea anemonegets attachedto the shell lining of hermit crab. The associationis :
The cell - mediated immunity inside the human body is carried out by :
Which of the following are likely to be present in deep sea water?
one of the representatives of phylum Arthopoda is:
Megasporangium is equivalent to:
Kyoto Protocol was endorsed at :
Figure shows human urinary system with structures labelled A to D. Select option which correctly identifies them and gives their characteristics and or functions.
In china rose the flowers are :
The Golgi complex plays a major role:
what external changes are visible after the last moult of a cockroach nymph
Isogamous condition with non-flagellated gametes is found in:
Transition state structure of the substrate formed during enzymatic reaction is :
Select the answer which correctly matches the endocrine gland with the hormone it secretes and its function/deficiency symptom :
The colonies of recombinant bacteria appear white in contrast to blue colonies of non recombinant bacteria because of
Monoecious plant of Chara shows occurrence of:
Advantage of cleistogamy is:
The H-zone in the skeletal muscle fibre is due to:
Artificial insemination means:
Which group of animals belong to the same phylum?
Seed coatis not thin, membranous in:
If two persons with ‘AB’ blood group marry and have sufficiently large number of children, these children could be classified as ‘A’ blood group:‘AB’ blood group :’B’ blood group in1:2:1 ratio. Modern technique of protein electrophoresis reveals presenceof both ‘A’ and ‘B’ type proteins in ‘AB’ blood groupindividuals. This is an exampleof:
Which of the following cannot be detected in a developing foetus by amniocentesis?
The first stable product of fixation of atmospheric nitrogen in leguminous plants is :
A biologist studied the population of rats in a barn .He found that the average natality was 250, average mortality 240,immigration 20 and emigration 30.The net increase in population is
Secondary productivity is rate of formation of new organic matter by :
Infection of Ascaris usually occurs by :
Figure shows schematic plan of blood circulation in humans with labels A to D. Identify the label and give its function/s,
The tendency of population to remain in genetic equilibrium maybedisturbed by :
A diagram showing axon terminal and synapseis given. Identify correctly at least two of A-D.
A good producer of citric acid is:
Age ofatreecan be estimatedby:
The process by which organisms with different evolutionary history evolve similar phenotypic adaptions in response to a common environmental challenge is called:
A stage in cell division is shown in figure.Select the answer which gives correct identification of the stage with its charecteristics
The figure shows a diagrammatic view of human respiratory system with labels A, B,C and D. Select the option which gives correct identification and main function and/or characteristic.
Interfascicular cambium develops from thecells of :
During seed germinationits stored food is mobilized by:
Meiosis takes place in:
According to Darwin,the organic evolution is due to:
Whichof the following criteria does not pertain to facilitated transport ?
A majorsite for synthesis of lipids is :
Natural reservoir of Phosphorus is
Which of the metabolites is common to respiration-mediated breakdown fats, crabohydrates and proteins
Which of the following process during decomposition is correctly described?
If both parents are carriers for thalessemia, whichis an autosomal recessive disorder, what are the chances of pregnancy resulting in an affected child ?
Whichofthe following statements is not true of two genes that show50% recombination frequency ?
One of the legal methods of birth control is :
Besides paddy fields, cyanobacteria are also found inside vegetative part of :
Which ofthe following are correctly matched with respect to their taxonomic classification ?
Variation in gene frequencies within populations can occur by chance rather than by naturalselection. This is referred to as:
Select the correct match of the digested products in humans given in column I with their absorption site and mechanism in column II.
Select the wrong statement
Which Mendelian idea is depicted by a cross in which the $$F_{1}$$ generation resembles both the parents
The diagram given here is the standard ECG of a normal Person> The P-wave represents the :
Which enzyme will be produced in a cell in which there is non sense mutation in the lac Y gene?
The most abundant intracellar cation is:
Which oneof the following is not the function of placenta ? It:
Inplant breeding programmes, the entire collection (of plants/seeds) havingall the diversealleles for all genes ina given cropis called :
Which one of the following is not a correct statement?
Which one of the following organelle in the figure correctly matches with its function ?
Which of the following represent maximum number of species among global biodiversity ?
Which of the following Bt crops is being grown in India by the farmers
Read the following statements (A-E) and answerthe question which follows them.
(A) In liverworts, mosses, and ferns gametophytes are free - living
(B) Gymnosperms and some ferns are heterosporous
(C) Sexual reproduction in Fucus, Volvox and Albugo is oogamous
(D) The sporophytein liverwortsis more elaborate than that in mosses
(E) Both,Pinus and Marchantia are dioecious
The essentail chemical components of many co-enzymes are :
Parts A,B,C and D of the human eye are shown in the diagram .select the option which gives correct identification along with its functions/ charecteristics:
The three boxes in this diagram represent the three major biosynthetic path ways in aerobic respiration. Arrows represent net reactants or products.
Arrows numbered 4, 8 and 12 can all be ;
Pigment-containing membranousextensions in some cyanobacteriaare:
Which one of the following statements is correct ?
The characteristics and an example of a synovial joint in humans is :
The Air Prevention and Control of Pollution Act came in to force in:
Product of sexual reproduction generally penerates :
Amongbitter gourd, mustard, brinjal, pumpkin, china rose, lupin, cucumber, sunnhemp, gram, guava, bean, chilli, plum, petunia, tomato, rose, withania, potato, onion, aloe and tulip how many plants have hypogynous flower
A pregnant female delivers a baby who suffers from stunted growth,mental retardation, low intelligence quotient and abnormal skin.This is the result of:
Which of the following is not correctly matched for the organism and its cell wall degrading enzyme?
Mentrual flow occurs due to lack of:
Global warming can be controlled by:
Which one of the following is not used for ex situ plant conservation?
During sewage treatment, biogases are produced which include:
The diagram shows an important concept in the genetic implication of DNA. Fill in the blanks A to C.
DNA fragments generated by the restriction endonucleases in a chemical reaction can be
separated by :
The complex formed by a pair of synapsed homologous chromosomes is called
The incorrect statement with regard to Haemophilia is:
Which of the following statements is correct in relation to the endocrine system ?
Lenticels are involved in
Match the names of the animal (column I),with one charecteristics (column II), and the phylum /class (colum III) to which it belongs:
What is the correct sequence of sperm formation?
Macro molecule chitin is :
In Young’s double slit experiment, the slits are 2mm apart and are illuminated by photons of two wavelengths $$\lambda_{1}$$ =12000 A and $$\lambda_{2}$$=10000 A. At what minimum distance from the common central bright fringe on the screen 2 m from the slit will a bright fringe from oneinterference pattern coincide with a bright fringe from the other?
In acommonemitter (CE) amplifier having a voltage gain G, the transistor used has transconductance 0.03 mho and current gain 25. If the abovetransistor is replaced with another one with transconductance 0.02 mho and current gain 20, the voltage gain will be:
A certain mass of Hydrogen is changed to Helium by the process of fusion. The Mass defect in fusion reactionis 0.02866 u. The energy liberated per u is :
(given 1 u=931 MeV)
In the given (V-T) diagram, what is the relation between pressures $$P_{1} and P_{2}$$?
The output (X) of the logic circuit shown in figure will be :
Three blocks with masses m, 2 m and 3 m are connected by strings, as shown in the figure. After an upward force F is applied on block m1, the masses move upward at constant speed v. What is the net force on the block of mass 2 m? (g is the acceleration due to gravity)
In a n-type semiconductor ,Which of the following statements is true?
The half life of a radioactive isotope 'X' is 20 years .It decades to another element 'Y' is 20 years . It decays to another element 'Y' which is stable . The two elements 'X' and 'Y' were found to be in the ratio 1:7 in a sample of a given rock.The age of the rock is estimated to be:
The molar specific heats of an ideal gas at constant pressure and volume are denoted by $$C_{P}$$ and $$C_{V}$$, respectively.
If $$\gamma = \frac{C_{p}}{C_{v}}$$ and R is the universal gas constant , then $$C_{v}$$ is equal to:
The wavelength $$\lambda_{c}$$,of an electron and $$\lambda_{p}$$ of a photon of same energy E are related by :
Ratio of longest wave lengths corresponding to Lymanand Balmerseries in hydrogen spectrum is :
A current loop in a magnetic field :
A, Band C are three points in a uniform electric field. The electric potential is :
A rod PQ of mass M and length L is hinged at end P. The rod is kept horizontal by a mass less string tied to point Q as shown in figure. When string is cut, the initial angular acceleration of the rod is :
A wire of resistance 4 2 is stretched to twice its original length. The resistance of stretched wire would be:
The velocity of a projectile at the intial point A is $$(2 \hat{i}+3\hat{j})$$ $$\frac{m}{s}$$.Its velocity (in $$\frac{m}{s}$$) at the point B is.
A body of mass m is taken from the earth surface to the height equal to twice the radius (R) of the earth .The change in potential energy of the body will be
A stone falls freely under gravity.It covers distances $$h_{1},h_{2},h_{3}$$ in the first five seconds ,the next five seconds and the next 5 seconds respectively .The relation between $$h_{1},h_{2}$$ and $$h_{3}$$ is:
A bar magnet of length ‘l’ and magnetic dipole moment ’M’ is bent in the form of an arc as shown in figure. The new magnetic dipole moment will be :
The internal resistance of a 2.1 V cell which gives a current of 0.2 A through a resistance of 10 Ω is:
For photoelectric emission from certain metal the cutoff frequencyis v. If radiation of frequency 2 v impinges on the metalplate, the maximum possible velocity of the emitted electron will be (m is the electron mass) :
During an adiabatic process, the pressure of a gasis found to be proportional to the cube of its temperature.The ratio of $$\frac{C_{p}}{C_{v}}$$.The ratio of $$\frac{C_{p}}{C_{v}}$$ of the gas is
The following four wires are made of the same material. Which of these will have the largest extension when the sametension is applied ?
The resistances of the four arms P,Q, R and S in a Wheatstone’s bridge are 10 ohm, 30 ohm, 30 ohm and 90 ohm,respectively. The e.m.f. and internal resistance of the cell are 7 Volt and 5 ohm respectively. If the galvanometerresistance is 50 ohm, the current drawnfromthecell will be :
Solution
to
The amount of heat energy required to raise the temperature of 1 g of Helium at NTP, from $$T_{1} K$$ to $$T_{2} K$$ is:
A piece of iron is heated in a flame.It first becomes dull red then becomes redissh yellow and finally turns to white hot.The correct explanation for the above observation is possible by using :
A gas is taken through the cycle $$A \rightarrow B \rightarrow C \rightarrow A$$ as shown. What is the net work done by the gas ?
The condition under which a microwave oven heats up a food item containing water molecules most efficiently is :
An explosion breaks a rock into three parts in a horizontal plane. Twoof themgooff at right angles to each other. Thefirst part of mass 1 kg moves with a speed of 12 $$ms^{-1}$$ and the secondpart of mass 2 kgmoves with 8 $$ms^{-1}$$ speed. If the thirdpart flies off with 4 $$ms^{-1}$$ speed, then its mass is :
In an experiment four quantities a, b, c and d are measured with percentage error 1%, 2%,3% and 4% respectively. Quantity P is calculated as follows;
$$P=\frac{a^{3}b^{2}}{cd}$$ % error in P is:
A small object of uniform density rolls up a curved surface with aninitial velocity ‘v’. It reaches up to a maximum height of $$\frac{3 \nu^{2}}{4g}$$ with respect to the initial position .The object is:
A plano convexlensfits exactly into a plan » concave lens. Their plane surfaces are parallel to each other. If lenses are madeofdifferent materials of refractive indices j1, and po and R is the radius of curvature of the curved surface of the lenses, then the focal length of the combination is:
A parallel beam of fast movingelectrons is incident normally on a narrow slit. A fluorescent screen is placed at a large distance from theslit. If the speed of the electronsis increased, which of the following statements is correct ?
For a normal eye,the cornea of eye provides converging power of 40 D and the least converging power of eye lens behind the cornea is 20D.using the information , the distance between the retina and cornea-eye lens can be estimated to be:
The upper half of a inclined plane of inclination $$\theta$$ is perfectly smooth while lower half is rough .A blocl starting from the rest top of the plane will gain come to rest at the bottom ,if the coefficients of the friction betwwen the block and lower half of the plane is given by:
A wave travelling in the +ve direction having displacements along y direction as 1m,wavelength $$2 \pi m$$ and frequency of $$\frac{1}{\pi}$$ Hz is reperesented by:
A source of unknown frequency gives 4 $$\frac{beats}{s}$$,when sounded with a source of known frequency 250 Hz. The second harmonic of the source of unknown frequency gives five beats per second, when sounded with a source of frequency 513 Hz. The unknown frequencyis:
A coil of self-inductance L is connected in series with a bulb B and an AC source. Brightness of the bulb decreases when:
Two pith balls carrying equal charges are suspended from a common point by strings of equal length, the equilibrium separation between them is r. Now the strings are rigidly clamped at half the height. The equilibrium separation between the balls now become:
If we study the vibration ofa pipe openatboth ends, then the following statement is not true:
When a proton is released from rest in a room,it starts with an initial acceleration $$a_{o}$$ towards west. When it is projected towards north with a speed $$\nu_{0}$$ it moves with an initial acceleration $$3a_{0}$$ toward west. The electric and magnetic fields in the room are:
A wire loop is rotated in a magnetic field. The frequency of change of direction of the induced e.m-f. is :
A uniform force of $$(3\hat{i}+\hat{j})$$ newtonacts on a particle of mass 2 kg. Hence theparticle is displaced from position $$(2\hat{i}+\hat{k})$$ meter to position: $$(4\hat{i}+3\hat{j}-\hat{k})$$ meter, The work done by the force on the particle is :
The wettability of a surface by a liquid depends primarly on:
Infinite number of bodies , each of mass 2 kg are situated on x-axis at distances 1m,2m,4m,8m,..... respectively form the origin. The resulting gravitational potentail due to this system at the origin will be:
The value of Planck's constant is $$6.63 \times 10^{-34}$$ Js .The speed of the light is $$43 \times 10^{17} nm s^{-1}$$. Which value is closest to the wavelength in nanometer of a quantum light with frequency of $$6 \times 10^{15}s s^{-1}$$?
The radical,
is aromatic because it has:
Which of the following is electron-deficient ?
Which of the following statements about the interstitial compoundsis incorrect ?
How many grams of concentrated nitric acid solution should be used to prepare 250mL of 2.0M $$HNO_{3}$$? The concentrated acid is 70% $$HNO_{3}$$
Which of the following lanthanoid ions is diamagnetic ?
(At nos. Ce = 58, Sm = 62, Eu = 63, Yb = 70)
Which oneof the following molecules contains no $$\pi$$ bond ?
Based on equation E=$$-2.178 \times 10^{-18} J \left(\frac{Z^{2}}{N^{2}}\right)$$ certain conclusions are written. Which of them is not correct ?
In the reaction
A is:
The order of the stability of the following tautomeric compounds is
Nylon is an example of
$$XeF_{2}$$ is iso-structural with:
The basic structural unit of silicates is :
Which of the following structure is similar to graphite ?
The structure of isobutyl group in an organic compound is:
Thenumberofcarbon atoms per unit cell of diamond unit cell is :
An excess of $$AgNO_{3}$$ is added to 100 mL of a 0.01M solution of dichlorotetraaquachromium(II]) chloride. The number of moles of AgCl precipitated would be:
Whatis the maximum numbers of electrons that can be associated with the following set of quantum numbers?
n=3,l=1and m=-1.
Whichof these is nota monomerfor a high molecular mass silicone polymer?
A reaction having equal energies of activation for forward andreverse reactionshas:
At $$25^\circ$$C molar conductance of 0.1 molar aqueous solution of ammonium hydroxide is $$9.54 ohm^{-1} cm^{2} mol^{-1}$$ and at infinite dilution its molar conductance is 238 $$ohm^{-1} cm^{2} mol^{-1}$$. The degree of ionisation of ammonium hydroxide at the same concentration and temperature is:
Structure of the compound whose IUPAC name is 3-Ethyl-2hydroxy-methylhex-3-en-5-ynoic acid is :
Among the following ethers which one will produce methyl alcohol on treatment with hot concentrated HI?
Antiseptics and disinfectants either kill or prevent growth of microrganisms. Identify which of the following statementsis nottrue :
A magnetic moment of 1.73 BM will be shown by one among the following:
$$KMnO_{4}$$ can be prepared from $$K_{2}MnO_{4}$$ as per the reaction $$3MnO_{4}^{2-} + 2H_{2}O \rightleftharpoons 2MnO_{4}^{-} + MnO_{2} + 4OH^{-}$$ The reaction can go to completion by removing $${OH}^{-}$$ ions by adding :
Reaction by which Benzaldehyde cannot be prepared :
Which of the following does not give oxygen on heating ?
A metal has a fcc lattice. The edge length of the unit cell is 404 pm. The density of the metal is 2.72 g $$cm^{-3}$$. The molar mass of the metal is : ($$N_{A}$$ Avagadro's constant = $$6.02 \times 10^{23} mol^{-1}$$)
Dipole - induced dipole interactions are present in which of the following pairs :
Roasting of sulphides gives the gas X as a by-product. This is a colorless gas with choking smell of burnt sulphur and causes great damage to respiratory organs as a result of acid rain. Its aqueoussolutionis acidic, acts as a reducing agent and its acid has never been isolated. The gas X is:
Some meat- directing substutients in aromatic substitution are given .Which one is most deactivating?
Nitrobenzene on reaction with $$\frac{conc.HNO_{3}}{H_{2}SO_{4}}$$ at 80 $$-100^\circ$$C forms which one of the following products?
A hydrogen gas electrode is made by dipping platinum wire in a solution of HCI of pH = 10 and by passing hydrogen gas around the platinum wire at one atm pressure. The oxidation potential of electrode would be ?
Which of the following is a polar molecule ?
A button cell used in watches functions as following $$Zn(s)+Ag_{2}O(S)+H_{2}O(l) \rightleftharpoons 2Ag(s)+{Zn}^{2+} (aq)+2{OH}^{-}(aq)$$
If half cell potentials are $${Zn}^{2+}(aq)+2e^{-}\rightarrow Zn(s);E^\circ = -0.76V$$
$$Ag_{2}O(s)+H_{2}O(1) + 2e^{-}\rightarrow 2Ag(s)+2OH^{-} (aq), E^\circ =-0.34V$$
The cell potential will be:
Which of these is least likely to act as a Lewis base ?
Which of the following compounds will not undergo Friedal - Craft's reaction easily :
Whichis the monomerof Neoprenein the following?
$$6.02 \times 10^{20}$$ molecules of urea are present in 100 nb. otits solution. The concentration of solution Is;
Maximum deviation from ideal gas is expected from:
Which of the following is paramagnetic ?
Identify correct order of solubilty in aqueous medium
What is the activation energy for a reaction if its rate doubles when the temperature is raised from $$2O^\circ$$C to $$35^\circ$$C $$(R=8.314 J mol^{-1}K^{-1})$$
Which is the strongest acid in the following?
