SAMPLE TEST PAPER

CLASS XIfor

2

CLASS-XI

PART-IIQ (MENTAL ABILITY)

This section contains 20 Multiple Choice Questions. Each question has four choices (1), (2), (3)and (4) out of which ONLY ONE is correct.

Directions (1 to 2) : In each of the following questions, a matrix of certain character is given. These charactersfollow a certain trend, row-wise or column-wise. Find out this trend and choose the missing character from the givenalternatives.

1.

6 11 25

8 6 16

12 5 ?

(1) 18 (2) 16 (3) 12 (4) 10

2. 125 51 9 8

87 44 4 9

79 37 6 ?

(1) 3 (2) 4 (3) 5 (4) 13

3. If O = 16, FOR = 42, then what is FRONT equal to?(1) 61 (2) 65 (3) 73 (4) 78

Directions (Q. 4) : Following questions are based on letter series. In each series some letters aremissing. The missing letters are given in the proper sequence as one of the alternative. Find thecorrect alternatives in each case and indicate your answer.

4. a — bba — aa — b—a(1) baab (2) aaba (3)aaab (4) abba

Direction (Q. 5) : In each of the following questions, statements are given followed by conclusions.You have to take the given statements to be true even if they seem to be at variance with commonlyknown facts and then decide which of the given conclusion logically follows from the givenstatements disregarding commonly known facts.

5. StatementsSome keys are staplers.Some staplers are stickers.All the stickers are pents.Conclusions1. Some pens are staplers. 2. Some stickers are keys.3. No sticker is key. 4. Some staplers are keys.(1) Only (1) and (2) (2) Only (2) and (4)(3) Only (2) and (3) (4) Only (1) and (4) and either (2) or (3)

INSTRUCTIONSTime duration: 2:30 hours. (The initial 30 minutes are given for filling Response Sheet and the test durationis 2 hours). 

Maximum Marks: 320This Question Paper consists of 2 parts which contains 80 MCQs with 4 choices Part 1: 20 questions on IQ (which comprises questions on application of logic & mental ability) Part 2 : 60 questions (Compulsory Subjects: Physics: 20, Chemistry: 20 & Optional Subjects

(only 1 subject to be attempted):  Biology: 20 or Maths: 20)

Marking Scheme: For each correct answer 4 marks are awarded and for each wrong answer -1 mark isawarded. In case of no response zero mark will be awarded.

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CLASS-XIDirections Questions (6 to 7) : In each of the following problems, there is one question and threestatements I, II and III given below the question. You have to decide whether the data given in thestatements is sufficient to answer the question. Read all the statements carefully and find which ofthe statements is/are sufficient to answer the given question. Choose the correct alternative ineach question.

6. How is ‘DATE’ written in the code language?I. DEAR is written as $#@? in that code.II. TREAT is written as %?#@% in that code.III. TEAR is written as %#@? in that code.(1) Only I and II (2) Only II and III (3) Only I and either II or III (4) None of these

7. Who among Siddhartha, Nikunj, Vipul and Mukul is the youngest?I. Vipul is younger than Mukul but older than Siddhartha and Nikunj.II. Mukul is the oldest.III. Siddhartha is older than Nikunj.(1) Only I (2) Only I and II (3) Only II and III (4) Only I and III

Direction (8-11) :Three ladies and four men are a group of friends i.e. P, K, R, Q, J, V and X. Eachone has a different profession i.e. Lawyer, Travel Agent, Air-hostess, Doctor, Professor, Consultantand Jeweller and each one owns a different car i.e. Alto, Corolla, Santro, Lancer, Ikon Scorpio andEsteem, not necessarily in that order. None of the ladies is a Consultant or a Lawyer. R is an Air-hostees and she owns as Ikon car. P owns a Scopio. K is not a Doctor. J is a Jeweller and he ownsCorolla. V is a Lawyer and does not own Alto. X is a Consulatant and owns Santro. The Doctorowns Esteem car whereas the Professor owns Scorpio. The Travel Agent owns an Alto. None of theladies owns a Scorpio.

8. Who are the three ladies in the group ?(1) V, R, K (2) R, P, J (3) R, K, Q (4) Data inadequate

9. What car does Q own ?(1) Esteem (2) Lancer (3) Alto (4) Santro

10. Who owns the car Lancer ?(1) V (2) X (3) K (4) Data inadequate

11. What is the profession of K ?(1) Doctor (2) Professor (3) Travel Agent (4) Data inadequate

Direction (12-14) : These questions are based on the following information :Seven villages A, B, C, D, E, F and G are situated as follows :E is 2 km to the west of B. F is 2 km to the north of A.C is 1 km to the west of A. D is 2 km to the south of G.G is 2 km to the east of C. D is exactly middle of B & E.

12. A is in the middle of :(1) E and C (2) E and G (3) F and G (4) Gand C

13. Which two villages are the farthest from one another ?(1) D and C (2) F and E (3) F and B (4) G and E

14. How far is E from F (in km) as the crow flies ?

(1) 4 (2) 20 (3) 5 (4) 26

15. There are two clocks on a wall, both set right at 10 : 00 AM. One clock is losing 2 min per hour & other clockis gaining 3 min per hour. If the clock which is losing 2 min per hour shows 3 : 00 PM the next day, what timedoes the clock gaining 3 min per hour show :(1) 4 : 15 PM (2) 5 : 00 PM (3) 5 : 30 PM (4) 4 : 00 PM

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CLASS-XI16. At what time between 5 o’clock and 6 o’clock do the hands of a clock coincide ?

(1) 25 min past 5 o’clock (2) 25511

min past 5 o’clock

(3) 27311

min past 5 o’clock (4) 31511

min past 5 o’clock

17. How many times does the 29th day of the month occur in 400 consecutive years ?(1) 4497 (2) 1237 (3) 5012 (4) 4126

18. A told B, "Yesterday I met the only brother of the daughter of my grand mother." Whom did A meet ?(1) Cousin (2) Brother (3) Nephew (4) Father

Direction (Q. 19) : In question, one term in the number series is wrong. Find out the wrong term.19. 4, 6, 15, 56, 280, 1644 :

(1) 280 (2) 1644 (3) 56 (4) 15

20. 8 4 6 15 52½ 236¼12 (a) (b) (c) (d) (e)What will come in place of (c) ?(1) 18 (2) 20 (3) 21½ (4) 22½

PART-IISECTION-A : PHYSICS

This section contains 20 Multiple Choice Questions. Each question has four choices (1), (2), (3)and (4) out of which ONLY ONE is correct.

21. Given that A +B+C

= 0. Out of three vectors A

, B

and C

two are equal in magnitude and the magnitude

of the third vector is 2 times that of either vector having equal magnitudes. Then the angle between thevectors is(1) 30, 60, 90 (2) 45, 45, 90 (3) 45, 60, 90 (4) 90, 135, 135

22.x 1

2

dt ta sin 1

a2at t

. The value of x is

(1) 1 (2) –1 (3) 0 (4) 2

23. The velocity-time graph of a linear motion is shown in figure. The displacement from the origin after 8 sec. is

V (m/s)

2

4

1 2 3 4 5 6

t (sec.)0

7 8

2

-2

(1) 5 m (2) 14 m (3) 8 m (4) none of these

24. A particle moves in xy plane. The position vector of particle at any time t is 2ˆ ˆr {(2t)i (2t ) j}m

. The rate of

change of at time t = 2 second. (where is the angle which its velocity vector makes with positive x-axis) is

(1)2

17 rad/s (2)

114

rad/s (3)47

rad/s (4)65

rad/s

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CLASS-XI

25. Time taken by the projectile to reach from A to B is t. Then the distance AB is equal to

(1)ut

3(2)

3 ut2

(3) 3 ut (4) 2 ut

26. A 2 kg block is connected with two springs of force constants k1 = 100 N/m andk2 = 300 N/m as shown in figure. The block is released from rest with the springs unstretched.The acceleration of the block in its lowest position is (g = 10 m/s2)

(1) zero

(2) 10 m/s2 upwards

(3) 10 m/s2 downwards

(4) 5 m/s2 upwards

27. Two blocks of masses 2 kg and 1 kg are in contact with each other on ahorizontal frictionless table. When a horizontal force of 3.0 N is applied tothe block of mass 2 kg, the value of the force of contact between the twoblocks is

2 kg 1 kg3 N

(1) 4 N (2) 3 N(3) 2 N (4) 1 N

28. A system of three blocks kept on ground is shown with the coefficients of friction in the figure. At any instant,two forces F1 and F2 act on the blocks as shown. The instantaneous acceleration of block C is

F1 = 60 N

30 kg20 kg10 kg

F2 = 20 NAB = 0.6BC = 0.1C, ground = 0.3

A

BC

(1) 2 m/s2 (2) zero m/s2 (3) 4 m/s2 (4) none of these

29. When the force retards the motion of a body the work done is(1) zero(2) negative(3) positive(4) +ve or –ve depending upon the magnitude of force and displacement

30. A particle is attached to an inextensible string of length 1 m in a verticalplane. The particle is released from position A with the string in stretched

state as shown in the figure. If Ba

and Ca

are magnitude of the particle at

lowest position B and the other extreme position C respectively. Then the

ratioB

C

a

a

is equal to

C

3737

A

B

(1) 0 (2) (3) 2/3 (4) 4/3

31. Two blocks A and B, having masses 100 kg and 200 kg are placed as shown inthe figure. The block A is connected to a wall with a light inextensible string. Thecoefficient of friction between the blocks is 0.2 and that between the block B andthe floor is 0.3. Then the minimum force required to move the block B will be(take g = 10 m/s2)(1) 600N (2) 800N (3) 900N (4) 1100N

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CLASS-XI32. A disc of radius 0.1 m undergoes accelerated rolling motion as shown in the

figure. The velocity and acceleration of centre of mass at a given instant is 10m/sec and 1 m/sec2 respectively. The magnitude of acceleration of Q (thehighest point on disc) w.r.t point of contact P at the given instant is

yQ

P

x

(1) 103 m/s2 (2) 2 3 22 (2 10 ) (3) 2 m/s2 (4) none of these

33. A particle is moving in x–y plane. At certain instant of time, the components of its velocity and acceleration areas follows vx = 3 m/s, vy = 4 m/s, ax = 2 m/s2 and ay = 1 m/s2. The rate of change of speed at this moment is

(1) 10 m/s2 (2) 4 m/s2 (3) 5 m/s2 (4) 2 m/s2

34. A tin sheet of uniform mass distribution is shown in figure. The CM of the sheetis at

(1) (5, –0.5)

(2) (–0.5, 5)

y10cm

6 cm

2 cm

4 cm

2cm

x

(3) (10, –1)

(4) (–1, 10)

35. A uniform rod of length is kept vertically on a smooth horizontal surface at x = 0. It is rotated slightly andreleased. When the rod finally falls on the horizontal surface the lower end will remain at

(1) x =2

x = 0x–axis

(2) x >2

(3) x <2

(4) x = 0

36. A shell is fired from a cannon with a velocity V at an angel with the horizontal direction. At the highest pointin its path, it explodes into two pieces of equal masses. One of the pieces retraces its path to the cannon. Thespeed of the other piece immediately after the explosion is

(1) 3V cos (2) 2V cos (3)32

V cos (4) 3V cos

37. A ball A is falling vertically downwards with velocity v1. It strikes elastically with awedge moving horizontally with velocity v2 as shown in figure. Component of thevelocity of particle a along the incline surface after the collision is v1

v2

30°

A

(1) 3 v1 (2)1v

3

(3) 2 v1 (4) 1v2

38. A uniform rod of mass m and length makes a constant angle with an axis of rotation which passes throughone end of the rod. Its moment of inertia about this axis is

(1)2m

3

(2)2m

3

sin (3)2m

3

sin2 (4)2m

3

cos2

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CLASS-XI39. A uniform rod of mass m and length is suspended by means of two light

inextensible strings as shown in figure. Tension in one string immediately afterthe other string is cut is

(1)mg2

(2) mg A B

(3)mg4

(4)2mg

40. A uniform disc of mass M and radius R is rolling without slipping with angularspeed on a horizontal plane as shown in figure. The magnitude of angularmomentum of the disc about the origin O is

(1)12

MR2 (2) MR2

y

O xR

M

(3)32

MR2 (4) 2 MR2

SECTION-B : CHEMISTRYThis section contains 20 Multiple Choice Questions. Each question has four choices (1), (2), (3)and (4) out of which ONLY ONE is correct.

41. 120 gm of solution containing 40% by mass of NaCl are mixed with 200 gm of a solution containing 15% bymass NaCl. Determine the mass percent of sodium chloride in the final solution.(1) 24.4% (2) 78% (3) 48.8% (4) 19.68%

42. The charge on 1 gram ions of Al3+ is

(1)271

NAe coulomb (2) 31

× NAe coulomb (3) 91

× NAecoulomb (4) 3 × NAe coulomb

43. Sulphur trioxide is prepared by the following two reactionsS8(s) + 8O2(g) 8SO2(g)2SO2 (g) + O2(g) 2SO3(g)

How many grams of SO3 are produced from 1 mol of S8 ?(1) 1280.0 (2) 640.0 (3) 960.0 (4) 320.0

44. If -particle with speed v0 is projected from infinity and it approches upto r0 distance from the nuclie. Then thespeed of -particle which approches upto 2r0 distance from the nucleus is

(1) 02v (2)0v

2(3) 2v0 (4) 0v

2

45. In a hydrogen like sample, ions are in a particular excited state, if electrons make transition upto 1 st

excited state, then it produces maximum 15 different types of spectral lines then electrons were in(1) 5th state (2) 6th state (3) 7th state (4) 8th state

46. For the Hydrogen spectrum, last line of the Lyman series has frequency 1 , last line of Lymen series of

He+ ion has frequency 2 and 1st line of Lyman series of He+ ion has frequency 3 then

(1) 4 1 = 2 + 3 (2) 1 = 4 2 + 3 (3) 2 = 3 – 1 (4) 2 = 1 + 3

47. Magnetic moment of Xn+ (Z = 26) is 24 B.M. Hence number of upaired electrons and value of n respectivelyare -(1) 4, 2 (2) 2, 4 (3) 3, 1 (4) 0, 2

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CLASS-XI48. The order of magnitude of ionic radii of ions Na+, Mg2+, Al3+ and Si4+ is

(1) Na+ < Mg2+ < Al3+ < Si4+ (2) Mg2+ > Na+ > Al3+ > Si4+

(3) Al3+ > Na+ > Si4+ > Mg2+ (4) Na+ > Mg2+ > Al3+ > Si4+

49. Which has maximum first ionization potential(1) C (2) N (3) B (4) O

50. Orbital angular momentum of an electron is h3

then the number of orientations of this orbital in space

are(1) 3 (2) 5 (3) 7 (4) 9

51. Wavelength of radiations emitted when an electron jumps from a state A to C is 2000 Å and it is 6000 Å whenthe electron jumps from state B to state C. Wavelength of the radiations emitted when an electron jumps fromstate A to B will be(1) 2000 Å (2) 3000 Å (3) 4000 Å (4) 6000 Å

52. The correct order of second ionisation enthalpy in the following :(1) F > O > N > C (2) O > F > N > C (3) O > N > F > C (4) C > N > O > F

53. S1 The HOMO in F2– is *2px =

*2py molecular orbitals.

S2 Bond order of O2– is more then O2

+ .

S3 NO+ is more stable than N2+

S4 C2 is more stable than C2+

State, in order, whether S1, S2, S3, S4 are true or false(1) FFFT (2) FTTT (3) FTFT (4) FFTT

54. The correct order of boiling point is :

(1) H2O < H2S < H2Se < H2Te (2) H2O > H2Se > H2Te > H2S

(3) H2O > H2S > H2Se > H2Te (4) H2O > H2Te > H2Se > H2S

55. How many nodal plane is/are present in 1s bonding molecular orbital?(1) zero (2) 1 (3) 2 (4) 3

56. Which one among the following does not have hydrogen bonds ?(1) boric acid (solid) (2) N2H4 (liquid) (3) H2O2 (liquid) (4) C6H6 (liquid)

57. Which of the following is ionic solid :(1) XeF6 (s) (2) PBr5(s) (3) CaC2(s) (4) All

58. A mixture of two gases A and B in the mole ratio 2 : 3 is kept in a 2 litre vessel. A second 3 litre vessel has thesame two gases in the mole ratio 3 : 5. Both gas mixtures have the same temperature and same pressure. Theyare allowed to intermix and the final temperature and pressure are the same as the initial values, the finalvolume being 5 litres. Given that the molar masses are MA and MB, what is the mean molar mass of the finalmixture ?

(1) A B77M 123M200

(2) A B123 M 77 M200

(3) A B77 M 123 M250

(4) A B123 M 77 M250

59. The ratio of the average molecular kinetic energy of UF6 to that of H2, both at 300 K, is(1) 1 : 1 (2) 7 : 2 (3) 176 : 1 (4) 2 : 7

9

CLASS-XI60. The curve of pressure volume (PV) against pressure (P) of the gas at a particular temperature is as shown,

according to the graph which of the following is incorrect (in the low pressure region)

(1) H2 and He show +ve deviation from ideal gas equation.(2) CO, CH4 and O2 show negative deviation from ideal gas equation.(3) H2 and He show negative deviation while CO2, CH4 and O2 show positive deviation.(4) H2 and He are less compressible than that of an ideal gas while CO2, CH4 and O2 more compressible tha

that of ideal gas.

Attempt any one of the section C or DSECTION-C : MATHEMATICS

This section contains 20 Multiple Choice Questions. Each question has four choices (1), (2), (3)and (4) out of which ONLY ONE is correct.

61. If cos(x – y), cos x and cos(x + y) are in H.P., then the value of2

ysec.xcos , is

(1)2

1(2) 2 (3) 1 (4) none of these

62. If a, b, c, d are in H.P., which of the following statements is correct(1) ad < bc (2) ad = bc (3) ad > bc (4) none of these

63. Roots of the equation | x2 – x – 6 | = (x + 2) are(1) –2, 1, 4 (2) 0, 2, 4 (3) 0, 1, 4 (4) – 2, 2, 4

64. The value of a for which the equation x3 + ax + 1 = 0 and x4 + ax2 + 1 = 0 have a common root is(1) 2 (2) –2 (3) 1 (4) –1

65. The real values of a for which the quadratic equation 2x2 – (a3 + 8a – 1)x + a2 – 4a = 0 possesses roots ofopposite signs is given by(1) a > 5 (2) 0 < a < 4 (3) a > 0 (4) a > 7

66. If the complex numbers z1, z2, z3 represent the vertices of an equilateral triangle such that| z1 | = | z2 | = | z3 |, then z1 + z2 + z3 is

(1) 0 (2) 3 (3) (4) 2

67. If sinicosx , sinicosy , thenyx

yx

is

(1) i cot2

(2) i tan2

(3) i cot2

(4) i tan2

68. If a, b, c are in A.P. then ax + by + c = 0 represents(1) a single line (2) a family of concurrent lines(3) a family of parallel lines (4) none of these

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CLASS-XI69. L 1 and L 2 are two lines. If the reflection of L 1 in L 2 and the reflection of L2 in L1 coincide , then

the angle between the lines is(1) 30° (2) 45° (3) 60° (4) 90°

70. A rhombus is inscribed in the region common to the two circles x² + y² - 4x - 12 = 0 andx² + y² + 4x - 12 = 0 with two of its vertices on the line joining the centres of the circles . The area ofthe rhombus is

(1) 8 3 sq. units (2) 4 3 sq. units

(3) 16 3 sq. units (4) none of these

71. Rays PA and PB both are tangent to the circle 4yxS 22 are drawn from the point P(-4, 0). The

centre of the largest circle which touches S , PA and PB is(1) (6,0) (2)(8,0) (3) (4,0) (4) (- 10/3,0)

72. If A B4

, then (tan A + 1) (tan B + 1) is equal to

(1) 1 (2) 2 (3) 3 (4) none of these

73. If cos 2B =cos(A C)cos(A C)

, then

(1) tan A, tan B, tan C are in A.P. (2) tan A, tan B, tan C are in G.P.(3) tan A, tan B, tan C are in H.P. (4) none of these

74. For real , value of 42 cossin lies in the interval

(1) [1, 2] (2)3

, 14

(3)1 5

,4 16

(4) none of these

75. The value(s) of for which the equation sin4 x + cos4 x + sin 2x + = 0 is valid, lie in the interval:

(1)3 1

,2 2

(2)

1 3,

2 2

(3)3 1

,2 2

(4) none of these

76. If equation2x bx 1ax c 1

, has roots equal in magnitude but opposite in sign, then the value of

is

(1)a ba b

(2)a ba b

(3) c (4)1c

77. If , , are the roots of the equation x3 + px2 + qx + r = 0, then1 1 1

is equal

to

(1) 2

1

r(2)

3

2

(1 r)

r

(3)

3

2

1 r

r

(4) – r

78. If x, y, z are real and unequal then the expression x2 + 4y2 + 9z2 – 6yz – 3zx – 2xy is always(1) non–negative (2) non–positive (3) zero (4) none of these

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CLASS-XI

79. The number of real solution of 2 2

1 1x 3

x 9 x 9

is

(1) 0 (2) 1 (3) 2 (4) 3

80. If the third term of a G.P. is equal to 4 , the product of its first five terms is equal to :(1) 26 (2) 210 (3) 28 (4) none of these

SECTION-D : BIOLOGY

This section contains 20 Multiple Choice Questions. Each question has four choices (1), (2), (3)and (4) out of which ONLY ONE is correct.

61. Select the characters, which are not applicable to the family Solanaceae

I. Epipetalous and syngenesious anthersII. Bicarpellary and syncarpous ovaryIII. Oblique ovary with axile placentationIV. Stamens six, arranged in two whorlsV. Bicarpellary syncarpous and inferior ovary(1) II and III only (2) I, IV, V only (3) II, IV and V only (4) I and III only

62. Ladies finger (bhindi/okra) belongs to(1) Malvaceae (2) Cruciferae (3) Solanaceae (4) Liliaceae

63. Binomial of sunhemp is(1) Crotolaria juncea (2) Arachis hypogea (3) Glycine max (4) Erythrina indica

64. Which of the following is the site of lipid synthesis?(1) Rough ER (2) Smooth ER (3) Golgi bodies (4) Ribosome

65. Sequence of four phases of cell cycle(1) G1 S G2 M (2) G1 G2 S M (3) S G1 G2 M (4) M G1 G2 S

66. Which of the following occurs more than one and less than five in a chromosome

(1) Chromatid (2) Centromere (3) Chromomere (4) Telomere

67. Acetyl CoA binds to oxaloacetic acid to form(1) Formaldehyde (2) Citrate (3) Acetate (4) Isocitrate

68. Which of the following organism is useful in the preparation of Roquefort cheese(1) Mucor (2) Rhizopus (3) Aspergillus (4) Penicillium

69. Correct sequence of electron acceptor of ATP synthesis

(1) Cyt b, c, a3, a (2) Cyt b, c, a, a3 (3) Cyt a, a3, b, c (4) Cyt c, b, a, a3

70. In which of the following, all listed genera belong to the same class of algae?(1) Chara, Fucus, Pohysiphonia (2) Volvox, Spirogyra, Chlamydomonas(3) Porphyra, Ectocarpus, Ulothrix (4) Sargassum, Laminaria, Gracillaria

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CLASS-XI71. Which one of the following options is correct :

Kingdom

Animalia(Multicellular)

Level oforganisation

Tissue/organ/organ system

Level

CellularLevel

Symmetry

Radial

Bilateral

Body cavityor coelom

Acoelomate

Pseudocoelomate

Coelomate

Phylum

(b)

(c)

(d)

(a)

(1) (a)–Porifera, (b)–Coelenterata, (c)–Echinodermata, (d)–Chordata(2) (a)–Porifera, (b)–Arthropoda, (c)–Coelenterata, (d)–Hemichordata(3) (a)–Porifera, (b)–Coelenterata, (c)–Hemichordata, (d)–Annelida(4) (a)–Porifera, (b)–Platyhelminthes, (c)–Aschelminthes, (d)–Annelida

72. Select the correct column match–Column–I Column–II

(A) Exocoetus (i) Fighting fish(B) Hippocampus (ii) Angel fish(C) Clarias (iii) Magur(D) Betta (iv) Sea horse(E) Pterophyllum (v) Flying fish(1) (A)–i, (B)–ii, (C)–iii, (D)–iv, (E)–v (2) (A)–ii, (B)–iii, (C)–iv, (D)–v, (E)–i(3) (A)–v, (B)–iv, (C)–iii, (D)–i, (E)–ii (4) (A)–iii, (B)–iv, (C)–v, (D)–i, (E)–ii

73. Some characters are given below :(a) They are mostly terrestrial animal and their body is covered by dry and cornified skin with scales or

scutes.(b) They are warm-blooded (homoiothermous) animals.(c) Heart is usually three-chambered.(d) The forelimbs are modified into wings.(e) Endoskeleton is fully ossified (bony) and the long bones are hollow with air cavities (pneumatic).How many characters are related to–(A)Aves (B) Reptilia(1) A–3, B–2 (2) A–2, B–2 (3) A–4, B–2 (4) A–2, B–4

74. The largest known invertebrate belongs to the phylum–(1) Echinodermata (2) Mollusca (3) Arthropoda (4) Annelida

75. Which of the following is not the feature of echinoderms?(1) Water vascular system (2) Tube Feet(3) Spiny endoskeleton (4) Bilateral symmetry in adults

76. A metal ion that is a cofactor for the proteolytic enzyme, carboxypeptidase, is–(1) Magnesium (2) Copper (3) Zinc (4) Calcium

77. Identify the molecule shown below–

HO

(1) Phospholipid (2) Ganglioside (3) Cholesterol (4) Triglyceride

13

CLASS-XI78. Given below is a secondary structure assumed by many proteins. Identify it–

C=O –N

C C

N–N C=0C C

O=C N–N

N O=C

C C

C=O N–N

N=N C=O

C C

O=C N–N

N O=C

C C

C=O N–C=O

N–N N

C C

O=C N=N

N O=C

(1) Alpha helix (2) Beta pleated sheet (3) Triple helix (4) Zwitter ion

79. What type of bond formation is shown in the following figure?

OH OH

OH

OH

OH

OH

OH

HO

HO

HOOH

OH

OH

OH

CH OH2

CH OH2

CH OH2

CH OH2

O

O

O

O

–D–Glucose –D–Glucose

H

H

H

H

H

H

H

H

H

H

H

H

+

H O2

O

Maltose

Nonreducingend

Reducingend

(1) Glycosidic bond (2) Peptide bond (3) Ester bond (4) Disulfide bond

80. Identify the molecule shown below–

OH

OHOH

HOCH 2O

(1) Ribose (2) Deoxyribose (3) Mannose (4) Sucrose

* * * * *

14

CLASS-XI

ANSWER KEY

1.(2) 2.(4) 3.(4) 4.(2) 5.(4) 6.(3) 7.(4) 8. (3) 9. (1) 10. (1)11.(3) 12.(4) 13.(3) 14.(1) 15.(3) 16.(3) 17.(1) 18. (4) 19. (1) 20. (4)21.(4) 22.(3) 23.(1) 24.(1) 25.(1) 26.(2) 27.(4) 28. (2) 29. (2) 30. (3)31.(4) 32.(2) 33.(4) 34.(1) 35.(1) 36.(4) 37.(4) 38. (3) 39. (3) 40. (3)41.(1) 42.(4) 43.(2) 44.(2) 45.(3) 46.(4) 47.(1) 48. (4) 49. (2) 50. (3)51.(2) 52.(2) 53.(4) 54.(4) 55.(1) 56.(4) 57.(4) 58. (1) 59. (1) 60. (3)61.(2) 62.(3) 63.(4) 64.(2) 65.(2) 66.(1) 67.(2) 68. (2) 69. (3) 70. (1)71.(2) 72.(2) 73.(2) 74.(2) 75.(1) 76. (1) 77. (2) 78. (1) 79. (1) 80. (2)

BIOLOGY61.(2) 62.(1) 63.(1) 64.(2) 65.(1) 66.(4) 67.(2) 68. (4) 69. (2) 70. (2)71.(4) 72.(3) 73.(1) 74.(2) 75.(4) 76. (3) 77. (3) 78. (2) 79. (1) 80. (1)