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651.

Which of the following is the contractile protein of a muscle?A. ActinB. MyosinC. TroponinD. Tropomysin

Answer» Correct Answer - A
652.

A normal leaf cell have how many genomes :A. 1B. 2C. 3D. 4

Answer» Correct Answer - B
653.

Water potential and osmotic potential of pure water areA. 0 and 0B. 0 and 1C. 100 and 0D. 100 and 100

Answer» Correct Answer - A
654.

In the human female , menstruation can be referred by the administration of :-A. FSH onlyB. LH onlyC. Combination of FSH and LHD. Combination of estrogen and progesterone

Answer» Correct Answer - D
655.

Which one is anatomically correctA. Cranial nerve – 10 pairsB. Floating ribs – 2 pairsC. Collar bones – 3 pairsD. Salivary glands – 1 pair

Answer» Correct Answer - B
656.

In which one of the following preparations are you likely to come across cell junctions most frequently ?A. Hyaline cartilageB. Ciliated epitheliumC. ThrombocytesD. Tendon

Answer» Correct Answer - B
657.

`alpha`-D glucose and `beta`-D -glucose areA. EpimersB. AnomerC. EnantiomersD. Diasteromers

Answer» Correct Answer - B
658.

`CF_(2) = CF_(2)` is a monomer ofA. TeflonB. OrlonC. PolytheneD. Nylon-6

Answer» Correct Answer - A
659.

Correct order of stability is:A. 1- butene `gt` Trans-2- butene `gt` Cis -2- buteneB. Trans-2-butene`gt`1-butene `gt` cis-2-buteneC. Trans-2-butene `gt` cis--2-butene `gt` 1-buteneD. Cis-2-butene `gt` Trans-2-butene`gt` 1 butene

Answer» Correct Answer - C
660.

2-butene shows geometrical isomerism due to:A. Restricted rotation about double bondB. Free rotation about double bondC. free rotation about single bondD. Chiral carbon

Answer» Correct Answer - A
661.

Megasporangium is equivalent toA. Embryo sacB. FruitC. NucellusD. Ovule

Answer» Correct Answer - D
Ovule is megasporangium and have sporogenous cells which produce megaspore by meiosis
662.

A good producer of citric acid is:A. AspergillusB. PseudomonasC. ClostridiumD. Saccharomyces

Answer» Correct Answer - A
Aspergilus niger is used in formation of citric acid
663.

Which of the following Bt crops is being grown in India by the farmers ?A. MaizeB. CottonC. BrinjalD. Soybean

Answer» Correct Answer - B
Bt cotton is commonly grown Bt crop of India.
664.

The tendency of population to remain in genetic equilibrium may be disturbed byA. random matingB. lack of migrationC. lack of mutationsD. lack of random mating

Answer» Correct Answer - D
Gene frequency remain stable or constant from generation to generation in a random mating population is Hardy weinberg principle if population lack random mating than
665.

Read the following statement (A-E) and answer the equestion which follows them (A) In liverworts, mosses and fems fametophytes are free living (B) Gymnospers and some ferms are heterosphorous (C) Sexual reproduction if Fucus, Volvox and Allbugo is oogamous (D) The sporophyte in liverworts is more elaborate than that in mosses (E) Both, Pinus and Marchantia are dioecious How many of the above statements are correctA. OneB. TwoC. ThreeD. Four

Answer» Correct Answer - C
Statement A, B and C are correct
666.

The process by which organisms with different evolutionary history evolve similar phenotypic adaptations in response to a common environmental challenge is called `:`A. Natural selectionB. Convergent evolutionC. Non-random evolutionD. Adaptive radiation

Answer» Correct Answer - B
Due to common environmental changes different animals develop similar looking feature. This phenomenon is known as convergent evolution.
667.

Variation in gene frequencies within populations can occur by chance rather than by natural selection. This is referred to asA. Genetic flowB. Genetic driftC. Random matingD. Genetic load

Answer» Correct Answer - B
If gene migration due to gene flow happens multiple times this variation in gene frequency change occurs by chance is genetic drift.
668.

In china rose the flowers areA. Actinomorphic, hypogynous with twisted aestivationB. Actinomorphic, epigynous with valvate aestivationC. Zygomorphic, hypogynous with imbricate aestivationD. Zygomorphic, epigynous with twisted aestivation

Answer» Correct Answer - A
Malvaceae family
669.

which of the following statements is not true of two genes that show 50 % recombination frequency ?A. The genes may be on different chromosomesB. The genes are tightly linkedC. The genes show independent assortmentD. If the genes are present on the same chromosome, they undergo more than one crossovers in every meiosis.

Answer» Correct Answer - B
If gene are present on same chromosome and tightly linked they show very few recombinant so they show 50% recombinant is wrong statement.
670.

Perisperm differs from endosperm inA. Being a haploid tissueB. Having no reserve foodC. Being a diploid tissueD. Its formation by fusion of secondary nucleus with several sperms

Answer» Correct Answer - C
Perisperm is persistent nucellus within seeds. It is not common as nucellus is nutritive tissue provide nutrition to embryosac. Nucellus is diploid tissue. In Beet, Piper it is persists within seed so it is diploid (2n) while endosperm is a triploid (3n) tissue
671.

Advantage of cleistogamy isA. Higher genetic variabilityB. More vigorous offspringC. No dependence on pollinatorsD. Vivipary

Answer» Correct Answer - C
Cleistogamy means closed flower which are bisexual does not requires pollinator still have assured seed set.
672.

Seed coat is not thin, membranous inA. MaizeB. CoconutC. GroundnutD. Gram

Answer» Correct Answer - D
Seed coat of legume (gram) is hard and thick due to presence of sclereids
673.

Meiosis takes place inA. MeiocyteB. ConidiaC. GemmuleD. Megaspore

Answer» Correct Answer - A
Meiocyte are the cells in which meiosis occur
674.

Transition state structure of the substrate formed during an enzymatic reaction isA. Transient but stableB. Permanent but unstableC. Transient and unstableD. Permanent and stable

Answer» Correct Answer - C
Transition state is intermediate state produced during enzymatic biochemical reaction which is transition state and unstable state
675.

Product of sexual reproduction generally generatesA. Longer viability of seedsB. Prolonged dormancyC. New genetic combination leading to variationD. Large biomass

Answer» Correct Answer - C
Sexual reproduction leads to new genetic combination leading to variation as it involves mixing of gametes to two different parents which are produced (gametes) by meiosis
676.

Pigment-containing membranous extensions in some cyanobacteria areA. HeterocystsB. Basal bodiesC. PneumatophoresD. Chromatophores

Answer» Correct Answer - D
Photosynthetic pigment are present in membranous extension chromatophore in cyanobacteria
677.

Which one of the following statements is correct ?A. Hard outer layer of pollen is called intineB. Sporogenous tissue is haploidC. Endothecium produces the microsporesD. Tapetum nourishes the developing pollen

Answer» Correct Answer - D
Tapetum is innermost layer of anther provide nutrition to developing microspore / pollens.
678.

Which of the following criteria does not pertain to facillatated transportA. Requirement of special membrane proteinsB. High selectivityC. Transport saturationD. Uphill transport

Answer» Correct Answer - D
Facilitated transport means transport with help of carrier proteins which may be both uphill i.e. against the concentration gradient and down hill i.e. in order of concentration gradient which is also called as facilitated diffusion or passive facilitated transport
679.

The complex formed by a pair of synapsed homologous chromosomes is calledA. Equatorial plateB. KinetochoreC. BivalentD. Axoneme

Answer» Correct Answer - C
Homologous chromosome are paired and synapsed during zygotene stage of meiosis-I and known as bivalent
680.

During seed germination, its stored food is mobilised byA. EthyleneB. CytokininC. ABAD. Gibberellin

Answer» Correct Answer - D
Gibberellin have characteristic function breaking of seed dormancy by activating stored food hydrolyzing enzymes amylase, lipase, protease.
681.

The most abundant intracellular cation isA. `Na^(+)`B. `Ca^(++)`C. `H^(+)`D. `K^(+)`

Answer» Correct Answer - D
`K^(+)` is most abundant ion of intracellular fluid while `Na^(+)` is extra cellular fluid.
682.

Which of the following is dependent on temperature?A. MolalityB. MolarityC. Mole fractionD. Weight percentage

Answer» Correct Answer - B
Molarity includes volume of solution which can change with change in temperature.
683.

At the critical micelle concentration, the surfactant molecules :A. AssociateB. DissociateC. DecomposeD. Become completely soluble

Answer» Correct Answer - A
684.

The number of moles of `KMnO_(4)` reduced by `1 "mol of" KI` in alkaline medium isA. OneB. TwoC. FiveD. One fifth

Answer» Correct Answer - B
685.

Select the correct statement from the ones given belowA. Barbiturates when given to criminals make them tell the truthB. Morphine is often given to persons who have undergone surgery as a pain killerC. Chewing tobacco lowers blood pressure and heart rateD. Cocaine is given to patients after surgery as it stimulates recovery

Answer» Correct Answer - B
686.

What is true for monoclonal antibodies : -A. These antibodies obtained from one parent and for one antigenB. These obtained from different parents and for one antigenC. These obtained from one parent and for many antigensD. These obtained from many parents and for many antigen

Answer» Correct Answer - A
687.

The Beans are cooked earlier in pressure cooker, because : -A. B.P. increase with increasing pressureB. B.P. decrease with increasing pressureC. Extra pressure of pressure cooker, softens the beansD. Internal energy is not lost while cooking is pressure cooker

Answer» Correct Answer - A
688.

Which is correct pair for edible part ?A. Tomato – ThalamusB. Maize - CotyledonsC. Guava - MesocarpD. Date palm - Pericarp

Answer» Correct Answer - D
689.

If `""_(b)X^(a)` emits firstly a positron, then two `alpha` and two `beta` and in the last `alpha` is emitted and finally it converts to `""_(d)^(c)Y`. The correct relation isA. c = b – 12, d = a – 5B. a = c – 8, d = b – 1C. a = c – 6, d = b – 0D. a = c – 4, a = b – 2

Answer» Correct Answer - A
690.

A man is 6 ft tall In order to see his entire image, he requires a plane mirror of minimum length equal toA. 12 feetB. 3 feetC. 6 feetD. An length

Answer» Correct Answer - B
The minimum height of mirror
`= (h)/(2) = (6)/(2) = 3` feet
691.

A particule moves in x - y plane acording to rule x = a sin `omega t` and y = a cos `omega t`. The particle followsA. a circular pathB. a parabolic pathC. a straight line path inclined equally to x and y-axesD. an elliptical path

Answer» Correct Answer - A
692.

(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 cosidered to be concentrated at its C.G.., (4) The radius of gyration of any body rotating about ab axis is the length of the perpendicular dropped from thr C.G. the body to the axis. which one of the following paries of statements is correct ?A. (a) and (b)B. (b) and (c )C. (c ) and (d)D. (d) and (a)

Answer» Correct Answer - A
693.

The electric field on an electromagnetic wave in free space is given by `E=10 cos (10^7t+kx) hatj V//m`, Where t and x are in seconds and metres respectively. It can be inferred that (1) the wavelength `lambda` is `188.4m`. (2) the wave number k is `0.33rad//m` (3) the wave amplitude is `10V//m` (4) the wave is propagating along +x direction. which one of the following pairs of statement is correct?A. (a) and (b)B. (b) and (c )C. (a) and (c )D. (c ) and (d)

Answer» Correct Answer - C
694.

A rectangular film of liquid is extended from `(4cmxx2cm)` to `(5cmxx4cm)`. If the work done is `3xx10^-4J`, the value of the surface tension of the liquid isA. 0.250 `Nm^(-1)`B. 0.125 `Nm^(-1)`C. 0.2 `Nm^(-1)`D. 8.0 `Nm^(-1)`

Answer» Correct Answer - B
`W=2(T DeltaA)`
`DeltaA=A_(2)-A_(1)`
`=(20-8)xx10^(-4)m^(2)`
`=12xx10^(-4)m^(2)`
`T=(W)/(2DeltaA)=(3xx10^(-4))/(2xx12xx10^(-4))`
`T=(1)/(8)Nm=0.125N//m`
695.

Three liquids of densities `rho_(1), rho_(2)` and `rho_(3)` (with `rho_(1) gt rho_(2) gt rho_(3)`), having the same value of surface tension T, rise to the same height in three identical capillaries. The angles of contact `theta_(1), theta_(2)` and `theta_(3)` obeyA. `(pi)/(2) gt theta_(1) gt theta_(2) gt theta_(3) ge 0`B. `0 le theta_(1) lt theta_(2) lt theta_(3) lt (pi)/(2)`C. `(pi)/(2) lt theta_(1) lt theta_(2) lt theta_(3) lt pi`D. `pi gt theta_(1) theta_(2) gt theta_(3) gt (pi)/(2)`

Answer» Correct Answer - B
`h=(2Tcostheta_(c))/(r rhog)=`same
`costheta_(c) prop rho`
`rho_(1) gt rho_(2) gt rho_(3)`
`costheta_(c_(1)) gt cos theta_(c_(2)) gt cos theta_(c_(3))`
`0 le theta_(c_(1)) lt theta_(c_(2)) lt theta_(c_(3)) lt (pi)/(2)`
696.

The catalytic activity of the transition metals and their compound is ascribed to:A. their unfilled d-orbitalsB. their ability of adopt variable oxidation statesC. their chemical reactivityD. their magnetic behaviour

Answer» Correct Answer - B
Transition metals are show variable oxidation states
`2SO_(2)+O_(2) overset(V_(2)O_(5))rarr 2SO_(3)`
`SO_(2)+overset(+5)V_(2)O_(5)rarrSO_(3)+overset(+4)V_(2)O_(4)`
`overset(+4)V_(2)O_(4)+O_(2)rarr overset(+5)V_(2)O_(5)`
697.

The vapour pressure of chloroform `(CHCl)_(3)` and dichlorocethene `(CH_(2)Cl_(2))` at `298 K` is `200 mm Hg ` and `415 mm Hg`, respectively. Calculate a. The vapour pressure of the solution prepared by mixing `25.5 g` of `CHCl_(3)` and `40 g` of `CH_(2)_Cl(2)` at `298 K`. b. Mole fractions of each components in vapour phase .A. 615.0 mm HgB. 347.9 mm HgC. 285.5 mm HgD. 173.9 mm Hg

Answer» Correct Answer - B
`{:(""CHCl_(3),""CH_(2)Cl_(2)),("(A)","(B)),(n_(A)=(25.5)/(119.5)=0.213,n_(B)=(40)/(85)=0.47):}`
`X_(A)=(n_(A))/(n_(A)+n_(B))=(0.213)/(0.684)=0.31`
`X_(B)=1-0.31=0.69`
`P=P_(A)^(@)X_(A)+P_(B)^(@)X_(B)`
`=200xx(0.31)+41.5(0.69)`
`=62.28+28.63=90.38`
Note: This question will be bonus because V.P. of Dichloromethane cannot be less than chloroform. (it would be 415 mm of Hg)
698.

Which one of the following sets forms biodegradable polymer?A. `H_(2)N-CH_(2)-COOH and H_(2)N-(CH_(2))_(5)-COOH`B. C. D. `CH_(2)=CH-CN and CH_(2)=CH-CH=CH_(2)`

Answer» Correct Answer - A
Nylon-2-Nylon-6 is the product which is a bio-degradable polymer.
699.

Which of the following is not a hereditary diseaseA. HaemophiliaB. CretinismC. Cystic fibrosisD. Thalasasemia

Answer» Correct Answer - B
700.

Select the wrong statement :A. Pseudopodia are locomotory and feeding structures in SporozoansB. Mushrooms belong to BasidiomycetesC. Cell wall is present in members of Fungi and PlantaeD. Mitochondria are the powerhouse of the cell in all kingdoms except Monera

Answer» Correct Answer - A
Pseudopodia are locomotory structures in sarcodines (Amoeboid)