Physics1. A boat can go across a lake and return in time

T0 at a speed v. On a rough day there is auniform current at speed v1 to help the onwardjourney and impede the return journey. If thetime taken to go across and return on the same day be T, then T T/ 0 will be(a)

1

1 12 2( / ) v v

(b) 1

1 12 2( / )+ v v

(c) ( / )1 12 2 v v (d) 1 1

2

2+

v

v

2. If a balloon of mass M is descending down withan acceleration a g( ),< then what is the valueof mass m (of its contents) that must beremoved so that it starts moving up with anacceleration a?(a)

Ma

g a( )+(b)

2Ma

g a( )+

(c) M

g a( )+(d) Not possible

3. If for a spherical mirror object distance, u = ( )50.1 0.5 cm and image distance v = ( )20.1 0.2 cm, then focal length of thespherical mirror will be(a) (14.3 0.1)cm(b) (14.3 0.5)cm(c) (30.1 0.1)cm(d) (25.3 0.5)cm

4. The susceptibility and permeability of aperfectly diamagnetic substance is(a) 1 and 0 (b) 0 and 1(c) 1 and 0 (d) 1 and 1

5. If a current carrying circular loop is placed in a x-y plane as shown in adjoining figure and amagnetic field is applied along z-axis, then theloop will

(a) contract(b) expand(c) move towards x-axis(d) move towards + x-axis

6. If the three vectors A B, and C satisfy therelation A B = 0 and A C = 0, then vector A isparallel to(a) A (b) B(c) A B (d) B C

7. A car weighing 2 103 kg and moving at20 m/s along a main road collides with a lorryof mass 8 103 kg which emerges at 5 m/sfrom a cross road at right angle to the mainroad. If the two vehicles lock, what will be their velocity after the collision?(a) 4 2/ m/s, 45 with cross road(b) 4 2/ m/s, 45 with main road(c) 4 2/ m/s, 60 with cross road(d) 4 2/ m/s, 60 with main road

x

x

x

x

x

x

x

x

x

x

x

x

y

x

Solved Paper 2013

JCECEMedical Entrance Exam

8. If a water particle of mass 10 mg and having acharge of 1.5 10 6 C stays suspended in aroom, then the magnitude and direction ofelectric field in the room is(a) 15 N/C, vertically upwards(b) 15 N/C, vertically dowards(c) 65.3 N/C, vertically upwards(d) 65.3 N/C, vertically downwards

9. In the adjoining figure, E r= =5 1V, , R R R2 1 34 1= = = , and C = 3F. Thenumerical value of the charge on each plate ofthe capacitor is

(a) 3 C (b) 6 C (c) 12 C (d) 24 C

10. Find out the value of current through 2 resistance for the given circuit

(a) zero (b) 2 A (c) 4 A (d) 5 A

11. A pure resistive circuit element X whenconnected to an AC supply of peak voltage200 V gives a peak current of 5 A. A secondcurrent element Y when connected to same AC supply gives the same value of peak currentbut the current lags behind by 90. If seriescombination of X and Y is connected to thesame supply, what is the impedance of thecircuit?(a) 40 (b) 80 (c) 40 2 (d) 2 40

12. Two circular coils C and D have equal numberof turns and carry equal currents in the samedirection in the same sense and subtend samesolid angle at point O as shown in figure. Thesmaller coil C is midway between O and D. Ifwe represent magnetic field induction due tobigger coil and smaller coil C as BD and BCrespectively, then B BD C/ is

(a) 1 4: (b) 1 2:(c) 2 1: (d) 1 1:

13. Equal volume of two immiscible liquids ofdensities and 2 are filled in a vessel asshown in figure. Two small holes are made atdepth h

2 and 3

2h from the surface of lighter

liquid. If v1 and v2 are the velocities of efflux atthese two holes, then v v1 2/ will be

(a) 1

2(b)

1

2 2

(c) 1

2(d)

1

4

14. Three conducting rods of same material andcross-section areconnected as shown infigure. Temperatures of A D, and C aremaintained at 20 C,90C and 0C. If there isno flow of heat in AB, then ratio of the lengthsof BC and BD is(a) 2/9 (b) 9/2(c) 2/7 (d) 7/2

15. If two air columns of lengths 100 cm and101 cm sounding in their fundamental notegave 17 beats in 20 seconds, then the velocityof sound will be(a) 277.8 m/s (b) 300 m/s(c) 250 m/s (d) 343.4 m/s

16. If two springs of spring constants k1 and k2while executing SHM have equal highestvelocities, then the ratio of their amplitudeswill be (their masses are in ratio 1 2: )(a) 2 2 1k k/ (b) 2 1 2k k/

(c) 2 1 2k k/ (d) 2 2 1k k/

2 | JCECE (Medical) l Solved Paper 2013

DC

O

v1

v2

2 h

h

D

B CA

20 V10 V 5 10

2

R1

R2

R3

CC

C C

E, r

17. In the adjoining circuit of logic gate, the output Y becomes zero if the inputs are

(a) A B C= = =1 1 0, , (b) A B C= = =0 0 0, ,(c) A B C= = =0 1 1, , (d) A B C= = =1 0 0, ,

18. LANDSAT series of satellites move in nearpolar orbits at an altitude of(a) 512 km (b) 918 km (c) 3000 km (d) 3600 km

19. The intensity of gamma radiation from a givensource is I. If on passing through 36 mm of lead its intensity is reduced to I

8, then what will be

the thickness of lead which reduces itsintensity to I

2?

(a) 6 mm (b) 9 mm (c) 12 mm (d) 18 mm

20. An unpolarized beam of light is incident on agroup of four polarizing sheets, which arearranged in such a way that the characteristicdirection of each polarizing sheet makes anangle of 30 with that of the preceding sheet.The fraction of incident unpolarized lighttransmitted is(a)

27

128(b)

128

27

(c) 37

128(d)

128

37

21. Two coherent sources of intensity ratio interfere. Then, the value ( ) /I Imax min ( )I Imax min+ is

(a) 1 +

(b)

1 +

(c) 1

2

+

(d) 2

1

+

22. A luminous object is placed at a distance of30 cm from the convex lens of focal length20 cm. On the other side of the lens, at whatdistance from the lens a convex mirror ofradius of curvature 10 cm be placed in order tohave an upright image of the object coincidentwith it ?(a) 60 cm (b) 50 cm(c) 30 cm (d) 20 cm

23. If a charge 150 nC is given to a concentricspherical shell and a charge + 50 nC is placedat its centre, then the charge on inner andouter surface of the shell is(a) 50 nC, 100 nC (b) 50 nC, 100 nC(c) 50 nC, 200 nC (d) 50 nC, 200 nC

24. Find out the equivalent resistance between A Band in the network of resistances shownin adjoining figure

(a) 25 (b) 10 (c) 5 (d) None of these

25. In the adjoining figure, if 10 calorie heat isproduced per second in 5 resistor due to theflow of current through it, then the heatproduced in 6 resistor is

(a) 1 cal/s (b) 2 cal/s(c) 3 cal/s (d) 4 cal/s

26. A rod of length L rotates about an axis passingthrough one of its ends and perpendicular toits plane. If the linear mass density of the rodvaries as = ( )Ar B3 + kg/m, then the momentof inertia of the rod about the given axis ofrotation is

(a) L AL

B3 3

3 2+

(b) L AL

B3 2

2

+

(c) L A

B3

3 2+

(d) None of the above

27. If a force of 4 N is applied on a body of mass20 kg, then the work done in 3rd second will be(a) 1.2 J (b) 2 J(c) 4 J (d) 16 J

JCECE (Medical) l Solved Paper 2013 | 3

+

10 V

A

B3

12

6

4

5 A B

4 6

Y

A

B

C

28. A body is projected with velocity v1 from thepoint A, another body at the same time isprojected vertically upwards from B withvelocity v2 as shown in adjoining figure. If thepoint B lies vertically below the highest pointC, then for both bodies to collide the ratio v

v2

1should be

(a) 0.5 (b) 1 (c) 3

2(d)

2

3

29. A police van moving on a highway with a speed of 30 km/h fires a bullet at a thiefs carspeeding away in the same direction with aspeed of 192 km/h. If the muzzle speed of thebullet is 150 km/h, with what speed does thebullet hit the thiefs car?(a) 105 m/s (b) 205 m/s (c) 210 m/s (d) 250 m/s

30. A machine gun of mass 10 kg fires 30 g bulletsat the rate of 6 bullets/s with a speed of400 m/s. The force required to keep the gun inposition will be(a) 30 N (b) 40 N (c) 72 N (d) 400 N

31. A body of mass 0.1 kg when rotated in acircular path of diameter 1.0 m on africtionless horizontal plane by means ofstring, makes 10 revolutions in 31.4 seconds.The centripetal force acting on the body will be(a) 0.2 N (b) 0.1 N (c) 2 N (d) 1 N

32. A plane electromagnetic wave propagating in x() direction as a wave function (in SI units) isgiven as ( , ) sin ( )x t x t= 10 3 10 9 103 6 14The speed of the wave is(a) 3 106 m/s (b) 3 107 m/s(c) 3 108 m/s (d) 9 1014 m/s

33. A thin lens of focal length f and aperturediameter d forms an image of intensity I. If thecentral part of the aperture upto diameter d / 2is blocked by an opaque paper, then the newfocal length and intensity of image will be(a)

f I

2 2, (b)

fI

2

3

4, (c) f

I,2

(d) f I,3

4

34. Light of wavelength strikes a photo sensitivesurface and electrons are ejected with kineticenergy E. If the kinetic energy is to beincreased to 2E, then the wavelength must bechanged to , where(a) > (b) =

2

(c) = 2 (d) 2

< I > III (b) I > III > II(c) III > II > I (d) I > II > III

34. The position of Br in the compound in CH CH==CHC (Br) CH )3 3 2( can be classified as(a) vinyl (b) secondary (c) allyl (d) aryl

35. Benzene does not undergo addition reactionseasily because(a) it has a cyclic structure (b) it has 6H-atoms(c) double bonds in it are very strong(d) resonance stabilized system is to be preserved

JCECE (Medical) l Solved Paper 2013 | 7

NO2

O O

36. Alkynes occur in nature in(a) free state (b) partially free state(c) not in free state (d) None of these

37. Which of the following reagents converts bothacetaldehyde and acetone to alkanes?(a) Ni / H2 (b) LiAlH4(c) I / NaOH2 (d) Zn-Hg / HCl

38. C H + Cl6 6 2 (excess) dark, coldAnhy. AlCl 3

P

Product, P is(a) C H Cl6 5 (b) C H Cl6 4 2(c) C H Cl6 6 6 (d) C Cl6 6

39. An alkene A contains three C C , eight C H -bonds and one C C -bond. A on ozonolysis gives two moles of an aldehyde of molar mass44 u. IUPAC name of A is(a) but-1-ene (b) but-2-ene(c) 2-methylpropane (d) None of these

40. Among the following which one can have ameso-form?(a) CH CH (OH)CH (Cl)C H3 2 5(b) CH CH (OH)CH (OH)CH3 3(c) C H CH (OH)CH (OH)CH2 5 3(d) HOCH CH(Cl)CH2 3

41. Calculate pH of 1 M NaHCO3. GivenH CO + H O HCO H O2 3 2 3

3

+s + ; p 6.38K1 =

HCO + H O CO + H O3

2 32

3+

s ; p = 10.26K2(a) 8.73 (b) 8.32(c) 6.73 (d) 6.32

42. Elements Se, Cl and S have been arranged inthe order of increasing ionisation energies.Identify the correct order.(a) S < Se < Cl(b) Se < S < Cl(c) Cl < S < Se(d) Se = S < Cl

43. Which of the following is correct for number ofelectrons, number of orbitals and type oforbitals respectively in Norbit?(a) 4, 4 and 8(b) 4, 8 and 16(c) 32, 16 and 4(d) 4, 16 and 32

44. The de-Broglie wavelength of helium atom atroom temperature is(a) 6.6 10 m 34(b) 4.39 m 10 10

(c) 7.34 m 10 11

(d) 2.335 m 10 20

45. In which of the following pairs ofmolecules/ions, the central atoms havesp2 hydridisation?(a) BF3 and NH2

(b) NO2 and NH3

(c) BF3 and NO2 (d) NH2

and H O2

46. If a gas expands at constant temperature, itindicates that(a) kinetic energy of molecules decreases(b) pressure of the gas increases(c) kinetic energy of molecules remains same(d) number of the molecules of gas increases

47. For the reaction,C H ( ) + 5O ( ) 3CO ( ) + 4H O( )3 8 2 2 2g g g lat constant temperature, H E is(a) + 3 RT (b) RT(c) + RT (d) 3 RT

48. In which of the following equilibrium Kc and K p are not equal?(a) 2C O 2CO( ) ( ) ( )s g g+ 2 2s(b) 2NO N O( ) ( ) ( )g g gs 2 2+(c) SO NO SO NO2 2 3( ) ( ) ( ) ( )g g g g+ +s(d) H I HI2 2 2( ) ( ) ( )g g g+ s

49. On adding 0.1M solution each of [Ag Ba Ca+ + +], [ ], ( ]2 2 in Na SO2 4 solution,species first precipitated is[K Ksp 4

11sp 4

6BaSO = 10 , CaSO = 10and Ksp 2 4

5Ag SO = 10 ](a) Ag SO2 4 (b) BaSO4(c) CaSO4 (d) All of these

50. Heat of neutralisation of HF (a weak acid) with strong base is 16.4 kcal. Calculate heat ofionisation of HF in water.(a) 13.7 kcal(b) 2.7 kcal(c) + 30.1 kcal(d) + 3.01 kcal

8 | JCECE (Medical) l Solved Paper 2013

Biology1. What would be the number of chromosomes in

the cells of the aleurone layer in a plant species with 8 chromosomes in its synergids?(a) 16 (b) 24 (c) 32 (d) 8

2. Golden rice is a promising transgenic crop.When released for cultivation, it will help in(a) alleviation of vitamin- A deficiency

(b) pest resistance

(c) herbicide tolerance

(d) producing a petrol-like fuel from rice

3. How does pruning help in making the hedgedense?(a) It induces the differentiation of new shoots from

the roots lock

(b) It frees axillary buds from apical dominance

(c) The apical shoot grows faster after pruning

(d) It releases wound hormones

4. Praying mentis is a good example of(a) Mullerian mimicry (b) warning colouration(c) social insects (d) camouflage

5. Examination of blood of a person suspected ofhaving anaemia, shows large, immature,nucleated erythrocytes without haemoglobin.Supplementing his diet with which of thefollowing, is likely to alleviate his symptoms?(a) Thiamine(b) Folic acid and cobalamine(c) Riboflavin(d) Iron compounds

6. In which of the following fruits is the ediblepart the aril?(a) Custard apple (b) Pomegranate(c) Orange (d) Litchi

7. Montreal protocol which calls for appropriateaction to protect the ozone layer from humanactivities was passed in the year(a) 1986 (b) 1987 (c) 1988 (d) 1985

8. Which one of the following is not used forconstruction of ecological pyramids?(a) Dry weight(b) Number of individuals(c) Rate of energy flow(d) Fresh weight

9. Niche overlap indicates(a) active co-operation between two species

(b) two different parasites on the same host

(c) sharing of one or more resources between thetwo species

(d) mutualism between two species

10. Treatment of seed at low temperature undermoist conditions to break its dormancy iscalled(a) scarification (b) vernalisation

(c) chelation (d) stratification

11. Which one of the following is not includedunder in situ conservation?(a) Sanctuary (b) Botanical garden(c) Biosphere reserve (d) National park

12. Phenotype of an organism is the result of(a) mutations and linkages(b) cytoplasmic effects and nutrition(c) environmental changes and sexual dimorphism(d) genotype and environment interactions

13. Moss peat is used as a packing material forsending flowers and live plants to distantplaces because(a) it is easily available(b) it is hygroscopic(c) it reduces transpiration(d) it serves as a disinfectant

14. A common structural feature of vesselelements and sieve tube elements is(a) thick secondary walls(b) pores on lateral walls(c) presence of P-protein(d) enucleate condition

15. In which mode of inheritance do you expectmore maternal influence among the offspring?(a) Autosomal (b) Cytoplasmic

(c) Y-linked (d) X-linked

16. Conifers differ from grasses in the(a) production of seeds from ovules(b) lack of xylem tracheids(c) absence of pollen tubes

(d) formation of endosperm before fertilisation

JCECE (Medical) l Solved Paper 2013 | 9

17. In maize, hybrid vigour is exploited by(a) bombarding the protoplast with DNA

(b) crossing of two inbreed parental lines

(c) harvesting seeds from the most productiveplants

(d) inducing mutations

18. Amino acid sequence, in protein synthesis isdecided by the sequence of(a) tRNA (b) mRNA (c) cDNA (d) rRNA

19. How many ATP molecules could maximally begenerated from one molecule of glucose, if thecomplete oxidation of one mole of glucose to CO2 and H O2 yields 686 kcal and the usefulchemical energy available in the high energyphosphate bond of one mole of ATP is 12 kcal?(a) Two (b) Thirty

(c) Fifty seven (d) One

20. Which one of the following is the correctlymatched pair of an endangered animal and aNational Park?(a) Lion Corbett National Park(b) Rhinoceros Kaziranga National Park(c) Wild ass Dudhwa National Park(d) Great Indian Keoladeo National Park bustard

21. A person showing unpredictable moods, outbursts of emotion, quarrel some behaviour and conflicts with others is suffering from(a) schizophrenia(b) Borderline Personality Disorder (BPD)(c) mood disorders(d) addictive disorders

22. Pentamerous, actinomorphic flowers,bicarpillary ovary with oblique septa and fruit a capsule or berry are characteristic features of(a) Asteraceae (b) Brassicaceae(c) Solanaceae (d) Liliaceae

23. People living at sea level have around 5 million RBC per cubic millimeter of their bloodwhereas those living at an altitude of5400 metres have around 8 million.This isbecause at high altitude(a) people get pollution-free air to breathe and more

oxygen is available

(b) atmospheric O2 level is less and hence moreRBCs are needed to absorb the required amountof O2 to survive

(c) there is more UV radiation which enhances RBCproduction

(d) people eat more nutritive food, therefore moreRBCs are formed

24. An important evidence in favour of organicevolution is the occurrence of(a) homologous and vestigial organs

(b) analogous and vestigial organs

(c) homologous organs only

(d) homologous and analogous organs

25. Which one of the following is not a living fossil?(a) King crab(b) Sphenodon(c) Archaeopteryx(d) Peripatus

26. Which one of the following is a matching set ofa phylum and its three examples?(a) Cnidaria Bonellia, Physalia, Aurelia

(b) Platyhelminthes Planaria, Schistosoma, Enterobius

(c) Mollusca Loligo, Teredo, Octopus

(d) Porifera Spongilla, Euplectella, Pennatula

27. Which of the following pairs of an animal and a plant represents endangered organisms inIndia?(a) Bentinckia nicobarica Red panda(b) Tamarind Rhesus monkey(c) Cinchona Leopard(d) Banyan Black buck

28. Jurassic period of the Mesozoic era ischaracterised by(a) gymnosperms are dominant plants and first birds

appear

(b) radiation of reptiles and origin of mammal likereptiles

(c) dinosaurs become extinct and angiospermsappear

(d) flowering plants and first dinosaurs appear

29. Which of the following statements regardingcilia is not correct?(a) The organised beating of cilia is controlled by

fluxes of Ca 2+ across the membrane

(b) Cilia are hair-like cellular appendages

(c) Microtubules of cilia are composed of tubulin

(d) Cilia contain an outer ring of nine doubletmicrotubules surrounding two single microtubules

10 | JCECE (Medical) l Solved Paper 2013

30. Microbes found to be very useful in geneticengineering are(a) Escherichia coli and Agrobacterium tumefaciens

(b) Vibrio cholerae and a tailed bacteriophage

(c) Diplococcus sp. and Pseudomonas sp

(d) Crown gall bacterium and Caenorhabditi selegans

31. Which of the following environmentalconditions are essential for optimum growth of Mucoron a piece of bread? I. Temperature of about 25C II. Temperature of about 5CIII.Relative humidity of about 5%IV. Relative humidity of about 95% V. A shady placeVI. A brightly illuminated placeChoose the answer from the following options(a) I, III and V (b) I, IV and V(c) II, IV and V (d) II, III and VI

32. During photorespiration, the oxygenconsuming reaction(s) occur in(a) stroma of chloroplasts and mitochondria

(b) stroma of chloroplasts and peroxisomes

(c) grana of chloroplasts and peroxisomes

(d) stroma of chloroplasts

33. Sertoli cells are regulated by the pituitaryhormone known as(a) FSH (b) GH (c) Prolactin (d) LH

34. The contractile protein of skeletal muscleinvolving ATPase activity is(a) tropomyosin (b) myosin(c) -actin (d) troponin

35. One gene-one enzyme hypothesis waspostulated by(a) R Franklin(b) Hershey and Chase(c) A Garrod(d) Beadle and Tatum

36. Test cross involves(a) crossing between two genotypes with recessive

trait

(b) crossing between two F1 hybrids

(c) crossing the F1 hybrid with a double recessivegenotype

(d) crossing between two genotypes with dominanttrait

37. Areolar connective tissue joins(a) fat body with muscles(b) integument with muscles(c) bones with muscles(d) bones with bones

38. Cri-du-chat syndrome in humans is caused bythe(a) fertilisation of an XX egg by a normal Y-bearing

sperm

(b) loss of half of the short arm of chromosome 5

(c) loss of half of the long arm of chromosome 5

(d) trisomy of 21st chromosome

39. Restriction endonuclease(a) cuts the DNA molecule randomly(b) cuts the DNA molecule at specific sites(c) restricts the synthesis of DNA inside the nucleus(d) synthesises DNA

40. Which of the following is an accumulation andrelease centre of neurohormones?(a) Posterior pituitary lobe(b) Intermediate lobe of the pituitary(c) Hypothalamus(d) Anterior pituitary lobe

41. Which one of the following has an opencirculatory system?(a) Pheretima (b) Periplaneta(c) Hirudinaria (d) Octopus

42. Which hormone causes dilation of bloodvessels, increased oxygen consumption andglycogenolysis?(a) ACTH (b) Insulin(c) Adrenaline (d) Glucagon

43. The causative agent of mad-cow disease is a(a) bacterium (b) prion(c) worm (d) virus

44. Biradial symmetry and lack of cnidoblasts arethe characteristics of(a) Starfish and sea anemone(b) Ctenoplana and Beroe(c) Aurlia and Paramecium(d) Hydra and starfish

45. The arrangement of the nuclei in a normalembryo sac in the dicot plants is(a) 2 4 2+ + (b) 3 2 3+ +(c) 2 3 3+ + (d) 3 3 2+ +

JCECE (Medical) l Solved Paper 2013 | 11

46. Triticale, the first man-made cereal crop, hasbeen obtained by crossing wheat with(a) rye(b) pearl millet(c) sugar cane(d) barley

47. HIV that causes AIDS, first starts destroying(a) B-Iymphocytes (b) leucocytes(c) thrombocytes (d) helper T-lymphocytes

48. In which one of the following sets of animals do all the four give birth to young ones?(a) Lion, bat, whale, ostrich(b) Platypus, penguin, bat, hippopotamus

(c) Shrew, bat, cat, kiwi(d) Kangaroo, hedgehog, dolphin, loris

49. Two common characters found in centipede,cockroach and crab are(a) compound eyes and anal cerci(b) jointed legs and chitinous exoskeleton(c) green gland and trachea(d) book lungs and antennae

50. Angiotensinogen is a protein produced andsecreted by(a) macula densa cells(b) endothelial cells (cells lining the blood vessels)(c) liver cells(d) juxtaglomerular (JG) cells

12 | JCECE (Medical) l Solved Paper 2013

AnswersPhysics

1. (a) 2. (b) 3. (a) 4. (c) 5. (b) 6. (d) 7. (b) 8. (c) 9. (b) 10. (a)

11. (c) 12. (b) 13. (a) 14. (c) 15. (d) 16. (a) 17. (a) 18. (b) 19. (c) 20. (a)

21. (d) 22. (b) 23. (b) 24. (c) 25. (c) 26. (a) 27. (b) 28. (a) 29. (a) 30. (c)

31. (a) 32. (c) 33. (d) 34. (d) 35. (c) 36. (b) 37. (a) 38. (b) 39. (d) 40. (a)

41. (b) 42. (a) 43. (c) 44. (a) 45. (b) 46. (a) 47. (b) 48. (c) 49. (b) 50. (b)

Chemistry1. (a) 2. (a) 3. (b) 4. (d) 5. (c) 6. (d) 7. (c) 8. (b) 9. (c) 10. (b)

11. (a) 12. (c) 13. (c) 14. (a) 15. (d) 16. (d) 17. (b) 18. (b) 19. (b) 20. (b)

21. (c) 22. (a) 23. (b) 24. (d) 25. (b) 26. (c) 27. (b) 28. (b) 29. (b) 30. (d)

31. (b) 32. (c) 33. (c) 34. (c) 35. (d) 36. (c) 37. (d) 38. (d) 39. (b) 40. (b)

41. (b) 42. (b) 43. (c) 44. (c) 45. (c) 46. (c) 47. (d) 48. (a) 49. (b) 50. (b)

Biology1. (b) 2. (a) 3. (b) 4. (c) 5. (d) 6. (d) 7. (b) 8. (d) 9. (b) 10. (d)

11. (b) 12. (d) 13. (b) 14. (b) 15. (b) 16. (d) 17. (b) 18. (b) 19. (b) 20. (b)

21. (a) 22. (c) 23. (b) 24. (a) 25. (c) 26. (c) 27. (a) 28. (a) 29. (c) 30. (a)

31. (b) 32. (b) 33. (a) 34. (b) 35. (d) 36. (c) 37. (b) 38. (b) 39. (b) 40. (c)

41. (b) 42. (c) 43. (b) 44. (b) 45. (b) 46. (a) 47. (d) 48. (d) 49. (b) 50. (c)