1. (4)
2. (3)
3. (1)
4. (2)
5. (4)
6. (3)
7. (3)
8. (4)
9. (1)
10. (2)
11. (3)
12. (2)
13. (3)
14. (1)
15. (3)
16. (1)
17. (2)
18. (4)
19. (2)
20. (1)
21. (3)
22. (4)
23. (2)
24. (1)
25. (2)
26. (1)
27. (2)
28. (2)
29. (3)
30. (3)
31. (1)
32. (4)
33. (2)
34. (1)
35. (3)
SECTION-B
36. (1)
37. (2)
38. (1)
39. (3)
40. (3)
41. (4)
42. (1)
43. (1)
44. (4)
45. (3)
46. (4)
47. (2)
48. (1)
49. (4)
50. (4)
(CHEMISTRY)
SECTION-A
51. (1)
52. (1)
53. (1)
54. (3)
55. (4)
56. (4)
57. (1)
58. (4)
59. (2)
60. (1)
61. (4)
62. (3)
63. (1)
64. (3)
65. (3)
66. (3)
67. (3)
68. (4)
69. (4)
70. (2)
71. (4)
72. (1)
73. (2)
74. (1)
75. (4)
76. (3)
77. (1)
78. (1)
79. (1)
80. (3)
81. (1)
82. (3)
83. (2)
84. (3)
85. (2)
SECTION-B
86. (2)
87. (3)
88. (1)
89. (1)
90. (1)
91. (1)
92. (4)
93. (3)
94. (2)
95. (1)
96. (4)
97. (2)
98. (2)
99. (4)
100. (1)
(BOTANY)
SECTION-A
101. (4)
102. (3)
103. (1)
104. (3)
105. (4)
106. (3)
107. (1)
108. (1)
109. (4)
110. (4)
111. (3)
112. (4)
113. (3)
114. (2)
115. (4)
116. (1)
117. (3)
118. (4)
119. (4)
120. (4)
121. (4)
122. (3)
123. (2)
124. (3)
125. (2)
126. (3)
127. (2)
128. (2)
129. (3)
130. (1)
131. (4)
132. (4)
133. (2)
134. (1)
135. (3)
SECTION-B
136. (1)
137. (4)
138. (3)
139. (2)
140. (4)
141. (3)
142. (3)
143. (1)
144. (1)
145. (1)
146. (3)
147. (1)
148. (3)
149. (1)
150. (3)
(ZOOLOGY)
SECTION-A
151. (4)
152. (2)
153. (3)
154. (2)
155. (2)
156. (1)
157. (4)
158. (4)
159. (2)
160. (1)
161. (2)
162. (2)
163. (2)
164. (3)
165. (3)
166. (4)
167. (3)
168. (3)
169. (2)
170. (4)
171. (4)
172. (3)
173. (2)
174. (2)
175. (3)
176. (2)
177. (4)
178. (2)
179. (2)
180. (2)
181. (2)
182. (3)
183. (3)
184. (3)
185. (3)
SECTION-B
186. (2)
187. (1)
188. (4)
189. (4)
190. (1)
191. (4)
192. (2)
193. (3)
194. (4)
195. (1)
196. (3)
197. (2)
198. (1)
199. (2)
200. (3)
DURATION: DURATION : 90 Minutes 200 Minutes
AITS TEST - 01
M. MARKS: 720
All India Test Series (2024-25)
DATE: 15/09/2024
Hints & Solutions
[AITS-01 | 12th-NEET | 15-09-2024]
(PHYSICS)
SECTION-A
1. (4)
Net charge enclosed inside spherical surface
= +q – q = 0
2. (3)
0
2
i
B
r
= ,
2 A r =
1
2
0 2
A
B i =
2 2
0
2
4
i
A
B
=
3. (1)
Current sensitivity
division on scale
current
=
4. (2)
1 1 2 3
C C C C eq
= + =
3
eq
C
C =
5. (4)
Charge on body remains same whether the body is
at rest or in motion. Electric charge is quantized.
When positive charge in given to a body, some
electrons are removed from it, hence its mass
slightly decreases.
6. (3)
Resistivity is a material property and it does not
change with length of material.
7. (3)
Line containing points A, B, C and D is
perpendicular to electric field lines.
VA = VB = VC = VD
8. (4)
Magnetic field along the axis of wire length is zero.
9. (1)
Distance
11
13
R
from center lies inside the spherical
shell. Electric field inside spherical shell is zero.
10. (2)
Electrostatic force is conservative force, hence
work done by electrostatic force depend on initial
and final position only.
11. (3)
Using KCL at junction D
iDE =+= 5 3 8
A
Using KCL at junction E
i i DE = +2
i = − = 8 2 6
A
12. (2)
Two parallel wires carrying currents in same
direction attracts each other while in opposite
direction repel each other.
13. (3)
For static equilibrium,
| | | | F F =
e
| | | | F q E =
50 = 200q
q = 0.25 Coulomb
14. (1)
ˆ
dV E i
dx
= −
2 ˆ
(6 5 1) d
x x i
dx
= − + +
ˆ
E x i = − + (12 5) ( 2 )
ˆ
( 29 ) E i x m =
= −
N/C
15. (3)
If voltage V is greater than rated voltage of both
bulbs, then both bulbs will get fused.
16. (1)
B ni =0
7
4 10 300 2 0.76 −
= =
mT
17. (2)
Magnitude of electric field at equatorial position of
electric dipole is
3
kp
r
.
18. (4)
C R = 4 0
0
1
4
R C
=
9 12 kC 9 10 10 10−
= =
R = 90 × 10–3 m = 9 cm.
19. (2)
0
3 4
i dl r dB
r
=
20. (1)
An ammeter should have small resistance and
voltmeter should have large resistance.
21. (3)
Eat p =0
1 2
2 2 0
(80 )
kq kq
x x
− =
+
1 2
2 2 (80 )
q q
x x
=
+
80 5
x
x
+
=
x = 20 cm.
Distance from negative charge = 20 + 80 = 100 cm
22. (4)
For balance condition,
40
60
X
Y
= ,
2
3
X
Y
=
23. (2)
mv R
qB
= ,
v qB
R m
= =
24. (1)
k q q k q q k q q ( )( 2 ) ( )( ) ( )( 2 ) U
LLL
− −
= + +
2
3kq U
L
−
=
U
= 0
2
3
ext
kq W U U
L
= − =
25. (2)
2
p i R =
p R
(i = constant)
26. (1)
0 enclosed 0 0 B dl I . (3 2) = = − =
27. (2)
4 2 3 0
kQ kq kq kQ V
r r r r
= − + + + =
6kq + 2kQ = 0
Q = –3q
28. (2)
2
l
R
V
= ,
2
(0.8 ) 0.64 l
R R
V
= =
Percentage decrease
100 R R
R
−
=
0.64 100 36% R R
R
−
= =
29. (3)
0 0 | | at A 4 4 (2 )
i i B
R R
= −
0
8
i
R
=
30. (3)
Circuit immediately after closing the switch
Req = 4
4 4 = i
i = 1A
31. (1)
1
kq V
r
= ,
2
3
2
2
kq V
r
=
1
2
4
3
r
r
=
32. (4)
2 m
T
qB
=
Time period is independent of speed of the particle.
33. (2)
Electric field is maximum at
2
R
x =
34. (1)
1 1 1
Req 2 4
= + ,
4
3
Req =
35. (3)
U P E = − | | | | cos
U is maximum at = 180°
SECTION-B
36. (1)
E xi yj zk
ˆ ˆ ˆ
= + + = p E
ˆ ˆ ˆ ˆ
= + + (3 ) ( ) i xi yj zk
− = − 12 3 3 k yk zj
ˆ ˆ ˆ
On comparing,
y = – 4, E j =−4
ˆ
37. (2)
W Q V = ( ) 50 6( ) − = − V V B A
25
3
V V B A
−
− =
volt
38. (1)
Using KVL
5 14 4 15 2 0 − − + − = i i i , i = 1A
V(across 14) = 1 × 14 = 14 volt
V i (across cell A) = −5 2
= 3V
V i (across cell B) = − 15 4
= 11V
39. (3)
Ratio of and does not depend on charges but
depend on mass only.
2
1
tan
tan
m
m
=
as m1 = m2
=
40. (3)
Due to symmetry, net electric field at O is zero,
hence force on charge particle Q is zero.
41. (4)
It always experience zero net force but value of
torque depend on orientation of dipole placed in
electrostatic field.
42. (1)
Potential difference V remains same as battery is
connected.
V = Ed …(1)
V = E(2d) …(2)
2
E
E=
43. (1)
F i l B = ( )
ˆ ˆ
= i Ri Bk ((4 ) ( )) = − 4 ( ) BiR j
ˆ
| | 4 F BiR =
44. (4)
Net electric field is zero in region I and III.
45. (3)
It is a balanced wheat-stone bridge.
20 20 10
20 20
Req
= =
+
20 = i × 10
i = 2A
46. (4)
When a charge particle enters a transverse
magnetic field, work done by magnetic force is
zero and linear momentum of particle is not
constant.
47. (2)
Q = 2CV
Work done by battery
2
= = QV CV 2
48. (1)
Current density is inversely proportional to the
cross-sectional area of wire.
49. (4)
( ) ˆ ˆ ˆ
F q i j qk m = = (3 ) (5 ) 15 F qE e
=
ˆ
=−15qk
ˆ ˆ
F qk qk net =−= 15 15 0
Net force on particle is zero, so it moves with
constant velocity.
50. (4)
2 2 (220) 484
100
V
R
P
= = =
Resistance of half piece
484 242
2
= =
Resistance of pieces when connected in parallel
242 121
2
= =
Energy liberated/second
2
220 220 400
121
V
P
R
= = =
W
[AITS-01 | 12th-NEET | 15-09-2024]
(CHEMISTRY)
SECTION-A
51. (1)
Osmotic pressure is widely used to determine
molar masses of proteins, polymers and other
macromolecules.
(NEW NCERT 12
th Part-I Page No. 21)
52. (1)
2 Cu 2e Cu + − + →
Charge required to reduce 1 mole of Cu2+ to Cu =
2 F
Hence, charge required to reduce 5 moles of Cu2+
to Cu = 10 F
(NEW NCERT 12th Part-I Page No. 52)
53. (1)
0 2.303 [A ] k log
t [A]
=
1
2.303 [100] k log
10 [100 90]
2.303 k log[10]
10
2.303 k
10
k 0.2303 min−
=
−
=
=
=
(NEW NCERT 12th Part-I Page No. 72)
54. (3)
For the same alkyl group, the boiling points of alkyl
halides decrease in the order: RI> RBr> RCl> RF.
This is because with the increase in size and mass
of halogen atom, the magnitude of van der Waal
forces increases.
(NEW NCERT 12
th Part-II Page No. 168)
55. (4)
Mole fraction and molality are temperature
independent while %w/V and molarity are
temperature dependent.
(NEW NCERT 12
th Part-I Page No. 03)
56. (4)
According to the relation, ∆rG = –nFEcell
Reaction will be spontaneous if,
∆rG < 0 and Ecell > 0
(NEW NCERT 12th Part-I Page No. 35)
57. (1)
From exp. (1); k[1.0]x
[1.0]y = 0.20 ……..(i)
From exp. (2); k[2.0]x
[1.0]y = 0.40 ……..(ii)
From exp. (3); k[2.0]x
[2.0]y = 0.40 ……..(iii)
Dividing eq.(ii) by (i)
x
x
[2.0] 0.40
[1.0] 0.20
=
(2)x = 2
x = 1
Dividing eq.(iii) by (ii)
y
y
[2.0] 0.40
[1.0] 0.40
=
(2)y = 1 = (2)0
y = 0
Hence, overall order = x + y = 1 + 0 = 1
(NEW NCERT 12th Part-I Page No. 73)
58. (4)
The presence of an electron withdrawing group at
ortho and para position increases the reactivity of
halogens in haloarenes toward SN reaction. More
the electron withdrawing group, more will be
reactivity towards nucleophilic substitution
reaction.
(NEW NCERT 12
th Part-II Page No. 182)
59. (2)
A mixture of chloroform and acetone forms a
solution with negative deviation from Raoult’s law.
This is because chloroform molecule is able to
form hydrogen bond with acetone molecule. This
decreases the escaping tendency of molecules for
each component and consequently the vapour
pressure decreases resulting in negative deviation
from Raoult’s law.
(NEW NCERT 12
th Part-I Page No. 14)
60. (1)
At cathode:
2 Cu 2e Cu(s) + − + →
At anode:
2Cl Cl 2e 2
− − → +
(NEW NCERT 12th Part-I Page No. 52)
61. (4)
For first order reaction,
1/2 t
is independent to the
initial concentration of reactant.
(NEW NCERT 12th Part-I Page No. 77)
62. (3)
The density increases with increase in number of
carbon atoms, halogen atoms and atomic mass of
the halogen atoms.
(NEW NCERT 12
th Part-II Page No. 169)
63. (1)
Lower the value of KH at a given temperature,
higher is the solubility of the gas in water.
(NEW NCERT 12
th Part-I Page No. 07)
64. (3)
Higher the reduction potential, lesser the reducing
power.
(NEW NCERT 12th Part-I Page No. 37)
65. (3)
For zero order reaction, Rate = k[A]0 ⇒ Rate = k
Hence, the unit of rate and rate constant are same.
Also, the rate of zero order reaction is independent
to initial concentration of reactant.
(NEW NCERT 12th Part-I Page No. 71)
66. (3)
Allylic and benzylic halides show high reactivity
towards the SN1 reaction. The carbocation formed
gets stabilised through resonance.
(NEW NCERT 12
th Part-II Page No. 174)
67. (3)
B
f f
B A
w 1000 T k
M w
=
f B
B
f A
k w 1000 M
T w
=
B
1.86 40 1000 M
0.4 500
=
MB = 372 g
(NEW NCERT 12
th Part-I Page No. 19)
68. (4)
Cell constant = resistance × specific conductance
= 100 × 0.5 × 10–3 = 0.05 cm–1
(NEW NCERT 12th Part-I Page No. 43)
69. (4)
rate = k[A]n
……..(i)
8 × rate = k[2A]n …..(ii)
Dividing (ii) by (i)
8 = (2)n
n = 3
(NEW NCERT 12th Part-I Page No. 65)
70. (2)
H+ has exceptionally high limiting molar
conductivity among all and Na+ has minimum
molar conductivity (50.1 S cm2 mol–1
).
(NEW NCERT 12
th Part-I Page No. 49)
71. (4)
• If in a nearly saturated solution, the dissolution
process is exothermic, the solubility will
decrease with rise in temperature.
• Pressure does not have any significant effect on
solubility of solids in liquids.
(NEW NCERT 12
th Part-I Page No. 06)
72. (1)
(NEW NCERT 12
th Part-II Page No. 170)
73. (2)
For a chemical reaction with rise in temperature by
10°C, the rate constant is nearly doubled.
(NEW NCERT 12th Part-I Page No. 78)
74. (1)
When alkyl halide is heated in the presence of
metallic fluorides, alkyl fluoride is obtained. The
reaction is termed as Swarts reaction.
(NEW NCERT 12
th Part-II Page No. 165)
75. (4)
2 Ba(NO ) Ba 2NO 3 2 3
Initial moles 1 0 0
After dissociation 1 α α 2α
+ − +
−
Total moles = 1 + 2
i = 1 + 2
1 1.50 1 0.50 α = 0.25 25%
2 2 2
i − −
= = = =
(NEW NCERT 12
th Part-I Page No. 23)
76. (3)
Dry cell is also known as Leclanche cell which is
used commonly in our transistors and clocks.
(NEW NCERT 12th Part-I Page No. 54)
77. (1)
H = Ef – Eb ⇒ – 40 = 80 – Eb ⇒ Eb = +120 kcal
(NEW NCERT 12th Part-I Page No. 79)
78. (1)
• 2,3-Dihyroxypropanal (OHCCHOH-CH2OH)
is a chiral molecule.
• SN2 reactions of optically active halides are
accompanied by inversion of configuration.
(NEW NCERT 12
th Part-II Page No. 179)
79. (1)
Higher the value of i × m, more will be the boiling
point of aqueous solution.
Na SO : m 3 0.2 0.6 2 4
Urea : m 1 0.1 0.1
Glucose: m 1 0.2 0.2
KCl: m 2 0.2 0.4
• = =
• = =
• = =
• = =
i
i
i
i
(NEW NCERT 12
th Part-I Page No. 18)
80. (3)
Conductivity always decreases with decrease in
concentration of both weak and strong electrolytes.
This can be explained by the fact that the number
of ions per unit volume that carry the current in a
solution decreases on dilution.
(NEW NCERT 12
th Part-I Page No. 46)
81. (1)
Ea
RT k Ae
−
=
log k = log A –
Ea
2.303RT
Comparing with y = mx + c
m
Ea
2.303R
−
=
(NEW NCERT 12
th Part-I Page No. 80)
82. (3)
Friedel-craft reaction:
(NEW NCERT 12
th Part-II Page No. 184)
83. (2)
Massof solute 1000 Molarity
Molarmassof solute V(inmL)
=
5.6 M 1000 2.5M
56 40
= =
(NEW NCERT 12
th Part-I Page No. 04)
84. (3)
2Cl Cl 2e 2
− − → +
MIt
w
nF
=
71 1930 t 35.5
2 96500
=
35.5 2 96500 t 50 sec
71 1930
= =
(NEW NCERT 12th Part-I Page No. 51)
85. (2)
• Decomposition of N2O5: 1st order reaction
• Inversion of cane sugar: pseudo 1st order reaction
• Hydrogenation of ethene: 1st order reaction
• Thermal decomposition of HI on gold surface: zero
order reaction.
(NEW NCERT 12th Part-I Page No. 78)
SECTION-B
86. (2)
light
3 2 2
(Phosgene)
2CHCl O 2COCl 2HCl + ⎯⎯⎯→ +
(NEW NCERT 12
th Part-II Page No. 178)
87. (3)
A B
1 2 χ and χ
3 3
= =
0 0 P =P T A A B B χ P χ +
1 2 200 50
3 3
= +
200 100
3 3
= +
= 100 mm Hg
(NEW NCERT 12
th Part-I Page No. 14)
88. (1)
0
(cell) C
0.059 E logK 1.10
2
= = C
1.10 2 logK 37.28
0.059
= =
(NEW NCERT 12th Part-I Page No. 39)
89. (1)
The general formula for unit of rate constant is:
Unit of k = mol1–n L
n–1
time–1
For First order reaction: Unit of k = s–1
For Second order reaction: Unit of k = mol–1 L s–1
For Third order reaction: Unit of k = mol–2 L
2
s
–1
For Zero order reaction: Unit of k = mol L–1
s
–1
(NEW NCERT 12
th Part-I Page No. 69)
90. (1)
List-I
(Reaction)
List-II
(Name of
reaction)
A. II. Wurtz-fittig
reaction
B. I. Fittig
reaction
C. IV. Sandmeyer’s
reaction
D. III. Finkelstein
reaction
(NEW NCERT 12
th Part-II Page No. 181)
91. (1)
π=CRT
=0.2×0.082×300
=4.92 atm
(NEW NCERT 12
th Part-I Page No. 22)
92. (4)
2
0 0 0
m 2 Mg Cl = + (MgCl ) 2 + −
= 106 + 2(76.3)
= 258.6 S cm2 mol–1
(NEW NCERT 12th Part-I Page No. 45)
93. (3)
• A catalyst does not alter Gibbs energy of a
reaction.
• A catalyst does not change the equilibrium
constant of a reaction.
(NEW NCERT 12th Part-I Page No. 82)
94. (2)
CH CH Br K ONO CH CH ONO KBr 3 2 3 2
+ − + → +
(NEW NCERT 12
th Part-II Page No. 170)
95. (1)
• At high altitudes the partial pressure of oxygen
is less than that at the ground level. This leads
to low concentrations of oxygen in the blood
and tissues of people living at high altitudes or
climbers. Low blood oxygen causes climbers
to become weak and unable to think clearly,
symptoms of a condition known as anoxia.
• To increase the solubility of CO2 in soft drinks
and soda water, the bottle is sealed under high
pressure.
(NEW NCERT 12
th Part-I Page No. 08)
96. (4)
Relative lowering of vapour pressure = Xsolute =
0.1 1
0.1 10 101
=
+
(NEW NCERT 12
th Part-I Page No. 21)
97. (2)
In Daniell cell, when Eext (opposite potential) >
1.10 V
• Electrons flow from Cu to Zn and current flows
from Zn to Cu.
• Zinc is deposited at the zinc electrode and
copper dissolves at copper electrode.
(NEW NCERT 12
th Part-I Page No. 32)
98. (2)
The solutions that show large negative deviation
from Raoult’s law form maximum boiling
azeotrope at a specific composition.
(NEW NCERT 12
th Part-I Page No. 15)
99. (4)
2 2 1 [Br ] 1 [H ] 1 1 [Br ] [H O]
rate
5 t 6 t 3 t 3 t
− +
= − = − = + = +
(NEW NCERT 12th Part-I Page No. 69)
100. (1)
In gem-dihalide, two halogen atoms are present on
same carbon atom.
(NEW NCERT 12
th Part-II Page No. 161)
[AITS-01 | 12th -NEET | 15-09-2024]
(BOTANY)
SECTION-A
101. (4)
In a transverse section, a typical microsporangium
appears near circular in outline. It is generally
surrounded by four wall layers– the epidermis
endothecium, middle layers and the tapetum.
(NEW NCERT 12th Page No. 05)
102. (3)
Chromosome 1 has most genes (2968), and the Y
has the fewest (231).
(NEW NCERT 12th Page No. 104)
103. (1)
Occurrence of more than one embryo in a seed is
referred to as polyembryony.
(NEW NCERT 12th Page No. 23)
104. (3)
Erwin Chargaff observed that for a double stranded
DNA, the ratios between Adenine and Thymine and
Guanine and Cytosine are constant and equals one.
(NEW NCERT 12th Page No. 81)
105. (4)
The number of ovules in an ovary may be one
(wheat, paddy, mango) to many (papaya, water
melon, orchids).
(NEW NCERT 12th Page No. 09)
106. (3)
In bacteria, the transcribed mRNA is functional,
hence can directly be translated.
(NEW NCERT 12th Page No. 108)
107. (1)
In dicots, the zygote gives rise to the proembryo
and subsequently to the globular, heart-shaped
and mature embryo.
(NEW NCERT 12th Page No. 19)
108. (1)
One of the rRNA acts as a catalyst for peptide
bond formation, which is an example of RNA
enzyme (ribozyme).
(NEW NCERT 12th Page No. 108)
109. (4)
In water pollination, pollen grains in many such
species are long, ribbon like and they are carried
passively inside the water; some of them reach the
stigma and achieve pollination. Majority of insectpollinated flowers are large, colourful, fragrant
and rich in nectar.
(NEW NCERT 12th Page No. 13, 14)
110. (4)
Griffith’s observations:
S strain → Inject into mice → Mice die
R strain → Inject into mice → Mice live
S strain (heat-killed) → Inject into mice → Mice live
S strain (heat-killed) + R strain (live) → Inject
into mice → Mice die
(NEW NCERT 12th Page No. 84)
111. (3)
During pollen-pistil interaction the pollen tube,
after reaching the ovary, enters the ovule through
the micropyle and then enters one of the synergids
through the filiform apparatus.
(NEW NCERT 12th Page No. 17)
112. (4)
GUG codes for amino acid Valine.
(NEW NCERT 12th Page No. 96)
113. (3)
A typical dicotyledonous embryo, consists of an
embryonal axis and two cotyledons. Embryos of
monocotyledons possess only one cotyledon.
(NEW NCERT 12th Page No. 19)
114. (2)
A nucleotide has three components – a nitrogenous
base, a pentose sugar (ribose in case of RNA, and
deoxyribose for DNA), and a phosphate group.
There are two types of nitrogenous bases – Purines
(Adenine and Guanine), and Pyrimidines (Cytosine,
Uracil and Thymine). Cytosine is common for both
DNA and RNA and Thymine is present in DNA.
Uracil is present in RNA at the place of Thymine.
(NEW NCERT 12th Page No. 80)
115. (4)
In some species floral rewards are in providing
safe places to lay eggs; an example is that of the
tallest flower of Amorphophallus.
(NEW NCERT 12th Page No. 14)
116. (1)
Francis Crick proposed the Central dogma in
molecular biology, which states that the genetic
information flows from DNA → RNA → Protein.
(NEW NCERT 12th Page No. 82)
117. (3)
Funicle A stalk which attaches ovule to
the placenta
Micropyle A small pore in the seed coat
Chalaza The basal part of the ovule
Integuments One or two protective envelopes
of the ovule
(NEW NCERT 12th Page No. 09)
118. (4)
In eukaryotes, when the small subunit encounters
an mRNA, the process of translation of the
mRNA to protein begins.
(NEW NCERT 12th Page No. 99)
119. (4)
In western countries, a large number of pollen
products in the form of tablets and syrups are
available in the market. Pollen consumption has
been claimed to increase the performance of
athletes and race horses.
(NEW NCERT 12th Page No. 08)
120. (4)
A molecule that can act as a genetic material must
fulfill the following criteria:
(i) It should be able to generate its replica
(Replication).
(ii) It should be stable chemically and structurally.
(iii) It should provide the scope for slow changes
(mutation) that are required for evolution.
(iv) It should be able to express itself in the form
of 'Mendelian Characters’.
(NEW NCERT 12th Page No. 87)
121. (4)
Some plants such as Viola (common pansy), Oxalis,
and Commelina produce two types of flowers –
chasmogamous flowers which are similar to flowers
of other species with exposed anthers and stigma,
and cleistogamous flowers which do not open at all.
(NEW NCERT 12th Page No. 12)
122. (3)
The DNA sequence coding for tRNA or rRNA
molecule define a gene. A gene is defined as the
functional unit of inheritance. Cistron is a segment
of DNA coding for a polypeptide. In eukaryotes, the
monocistronic structural genes have interrupted
coding sequences – the genes in eukaryotes are split.
(NEW NCERT 12th Page No. 93)
123. (2)
The moth deposits its eggs in the locule of the ovary
and the Yucca flower, in turn, gets pollinated by the
moth. The larvae of the moth come out of the eggs
as the seeds start developing.
(NEW NCERT 12th Page No. 14)
124. (3)
Prior to the work of Oswald Avery, Colin
MacLeod and Maclyn McCarty (1933 – 44), the
genetic material was thought to be a protein.
(NEW NCERT 12th Page No. 85)
125. (2)
Endosperm may either be completely consumed
by the developing embryo (e.g., pea, groundnut,
beans) before seed maturation or it may persist in
the mature seed (e.g. castor and coconut) and be
used up during seed germination.
(NEW NCERT 12th Page No. 19)
126. (3)
Taylor and
colleagues
DNA replicates semiconservatively
Hershey and
Chase
DNA is the genetic material
Griffith Transforming principle
Avery, MacLeod
McCarty
Biochemical characterisation
of ‘transforming principle’
(NEW NCERT 12th Page No. 93)
127. (2)
The placenta is located inside the ovarian cavity
(locule).
(NEW NCERT 12th Page No. 08)
128. (2)
The unequivocal proof of DNA as genetic
material came from studies on a bacteriophage
(Virus that infects bacteria). The experiments
performed by Alfred Hershey and Martha Chase.
(NEW NCERT 12th Page No. 85)
129. (3)
There are several records of very old yet viable seeds.
The oldest is that of a lupine, Lupinus arcticus
excavated from Arctic Tundra. The seed germinated
and flowered after an estimated record of 10,000
years of dormancy. A recent record of 2000 years old
viable seed is of the date palm, Phoenix dactylifera
discovered during the archeological excavation at
King Herod’s palace near the Dead Sea.
(NEW NCERT 12th Page No. 22)
130. (1)
The discontinuously synthesised fragments are
later joined by the enzyme DNA ligase.
(NEW NCERT 12th Page No. 90)
131. (4)
Parthenocarpy can be induced through the
application of growth hormones and such fruits
are seedless.
(NEW NCERT 12th Page No. 21)
132. (4)
In the post-transcriptional modification step called
capping, an unusual nucleotide called methyl
guanosine triphosphate is added to the 5’ end of
hnRNA.
(NEW NCERT 12th Page No. 95)
133. (2)
The innermost wall layer of microsporangium is the
tapetum. It nourishes the developing pollen grains.
Cells of the tapetum possess dense cytoplasm and
generally have more than one nucleus.
(NEW NCERT 12th Page No. 05)
134. (1)
The technique of DNA Fingerprinting was
initially developed by Alec Jeffreys. He used a
satellite DNA as probe that shows very high
degree of polymorphism. It was called as Variable
Number of Tandem Repeats (VNTR). The size of
VNTR varies in size from 0.1 to 20 kb.
(NEW NCERT 12th Page No. 106)
135. (3)
Tassels wave in wind to trap
pollen grains
Corn cob
Fllower 6 feet in height Amorphophallus
Multicarpellary, apocarpous
gynoecium
Michelia
Insect or wind pollinated
aquatic plant
Water hyacinth
(NEW NCERT 12th Page No. 09, 13, 14)
SECTION-B
136. (1)
In eukaryotes, the regulation could be exerted at
(i) transcriptional level (formation of primary
transcript),
(ii) processing level (regulation of splicing),
(iii) transport of mRNA from nucleus to the
cytoplasm,
(iv) translational level.
(NEW NCERT 12th Page No. 99)
137. (4)
In an embryo sac three cells are at the chalazal
end and are called the antipodals.
(NEW NCERT 12th Page No. 11)
138. (3)
In eukaryotes, the replication of DNA takes place
at S-phase of the cell-cycle. A failure in cell
division after DNA replication results into
polyploidy(a chromosomal anomaly).
(NEW NCERT 12th Page No. 91)
139. (2)
Transfer of pollen grains from anther to the
stigma of a different plant. This is the only type of
pollination which during pollination brings
genetically different types of pollen grains to the
stigma.
(NEW NCERT 12th Page No. 12)
140. (4)
There are no tRNAs for stop codons that are
UAA, UAG and UGA. AUG has a tRNA called
initiator tRNA.
(NEW NCERT 12th Page No. 98)
141. (3)
The synergids have special cellular thickenings at
the micropylar tip called filiform apparatus, which
play an important role in guiding the pollen tubes
into the synergid.
(NEW NCERT 12th Page No. 11)
142. (3)
The ribosome consists of structural RNAs and
about 80 different proteins.
(NEW NCERT 12th Page No. 99)
143. (1)
Pollination by water in Vallisneria
(NEW NCERT 12th Page No. 14)
144. (1)
The goal of HGP is to identify all the approximately
20,000 – 25,000 genes in human DNA.
(NEW NCERT 12th Page No. 102)
145. (1)
z Gene beta-galactosidase
y Gene Permease
a Gene Transacetylase
i Gene Repressor protein
(NEW NCERT 12th Page No. 101)
146. (3)
Sporopollenin is the main component of exine
wall layer of pollen grain.
(NEW NCERT 12th Page No. 07)
147. (1)
The technique of DNA Fingerprinting was
initially developed by Alec Jeffreys.
(NEW NCERT 12th Page No. 106)
148. (3)
Occasionally, in some seeds such as black pepper
and beet, remnants of nucellus are also persistent.
This residual, persistent nucellus is the perisperm.
(NEW NCERT 12th Page No. 20)
149. (1)
During the human genome project, the sequence of
chromosome 1 was completed only in May 2006.
(NEW NCERT 12th Page No. 103)
150. (3)
Angiosperms exhibit double fertilisation because
two fusion events occur in each embryo sac,
namely syngamy and triple fusion.
(NEW NCERT 12th Page No. 24)
[AITS -01 | 12th-NEET | 15-09-2024]
(ZOOLOGY)
SECTION-A
151. (4)
During secretory phase of menstrual cycle the
levels of estrogen and progesterone increases
because corpus luteum begins to secrete large
amounts of progesterone and some amount of
estrogen. These hormones helps in maintenance of
endometrium to support potential pregnancy, whereas
level of LH and FSH decreases during this phase.
(NEW NCERT 12th Page No. 34)
152. (2)
In Syphilis, Gonorrhoea and Genital warts sex
organs are affected. In AIDS, sex organs are not
affected but, deficiency of immune system occurs
which provide suitable condition for various
diseases to attack body.
(NEW NCERT 12th Page No. 47)
153. (3)
The uterus is single and it is also called womb. The
wall of the uterus has three layers of tissue. The
external thin membranous perimetrium, middle
thick layer of smooth muscle, myometrium and
inner glandular layer called endometrium that lines
the uterine cavity.
(NEW NCERT 12th Page No. 30)
154. (2)
An ideal contraceptive should be user-friendly,
easily available, effective and reversible with no or
least side-effects. It also should in no way interfere
with the sexual drive, desire and/or the sexual act
of the user. Effectiveness is critical in preventing
unintended pregnancies, and a contraceptive that is
least effective would not reliably serve its purpose.
(NEW NCERT 12th Page No. 43)
155. (2)
List-I List-II
Interstitial space Leydig cells
Seminiferous tubule Highly coiled tube
Sertoli cells Nutrition to germ cells
Male germ cells Spermatogonia
(NEW NCERT 12th Page No. 27)
156. (1)
Gametogenesis in human females i.e., Oogenesis is
initiated during the embryonic development stage
when a couple of million gamete mother cells
(oogonia) are formed within each fetal ovary; no
more oogonia are formed and added after birth.
(NEW NCERT 12th Page No. 32)
157. (4)
Sperm is a microscopic structure composed of a
head, neck, a middle piece and a tail. It is produced
in seminiferous tubule.
(NEW NCERT 12th Page No. 27)
158. (4)
Lactational amenorrhea method is based on the fact
that ovulation and therefore, the cycle do not occur
during the period of intense lactation following
parturition. Thus, as long as the mother breastfeeds
the child fully, the chances of conception are
almost nil. However, this method has been reported
to be effective only up to a maximum period of six
months following parturition.
(NEW NCERT 12th Page No. 44)
159. (2)
FSH acts on the Sertoli cells and stimulates
secretion of some factors which help in the process
of spermiogenesis.
(NEW NCERT 12th Page No. 31)
160. (1)
Natural methods work on the principle of avoiding
chances of ovum and sperms meeting i.e.
preventing fertilisation.
(NEW NCERT 12th Page No. 44)
161. (2)
The second meiotic divisions of the mammalian
ovum occurs when sperm enters the secondary
oocyte which results in formation of ovum and
second polar body.
(NEW NCERT 12th Page No. 35, 36)
162. (2)
Administration of progestogens or progestogenestrogen combination pills or IUDs within 72 hours
(i.e. 3 days) of coitus are very effective as
emergency contraceptives as they could be used to
avoid possible pregnancy due to rape or casual
unprotected intercourse.
(NEW NCERT 12th Page No. 45)
163. (2)
Spermatogonia and primary spermatocytes are
diploid whereas secondary spermatocytes and
sperms are haploid and contains 23 chromosomes.
(NEW NCERT 12th Page No. 31)
164. (3)
Additional benefit of condom is that it protect the
user from contracting STIs and AIDS.
(NEW NCERT 12th Page No. 44)
165. (3)
The shape of the uterus is like an inverted pear. The
wall of the uterus has three layers of tissue. The
external thin membranous perimetrium, middle
thick layer of smooth muscle, myometrium and
inner glandular layer called endometrium that lines
the uterine cavity.
(NEW NCERT 12th Page No. 30)
166. (4)
Diaphragms, cervical caps and vaults are barriers
made of rubber that are inserted into the female
reproductive tract to cover the cervix during coitus.
They prevent conception by blocking the entry of
sperms through the cervix.
(NEW NCERT 12th Page No. 44)
167. (3)
The first menstruation begins at puberty and is
called menarche. In human beings, menstrual
cycles ceases around 50 years of age; that is termed
as menopause.
(NEW NCERT 12th Page No. 35)
168. (3)
Hormone-releasing IUDs are designed to provide
contraception by releasing hormones directly into
the uterus. Progestasert is a hormone-releasing
IUD. It contains progesterone (a type of progestin)
that is released into the uterus to prevent
pregnancy. The hormone thickens cervical mucus
and thins the endometrial lining, reducing the
likelihood of implantation.
(NEW NCERT 12th Page No. 44)
169. (2)
During fertilisation, a sperm comes in contact with
the zona pellucida layer of the ovum and induces
changes in the membrane that block the entry of
additional sperms. Thus, it ensures that only one
sperm can fertilise an ovum. The entry of sperm
activates the secondary oocyte to completes second
meiotic division.
During fertilisation haploid nuclei of sperm and
haploid nuclei of ovum fused to form diploid
nuclei. During entry of sperm into ovum all
chromosomes enter the egg.
(NEW NCERT 12th Page No. 35)
170. (4)
IUDs increase phagocytosis of sperms within the
uterus and the Cu ions released suppress sperm
motility and the fertilising capacity of sperms.
(NEW NCERT 12th Page No. 44)
171. (4)
Human chorionic gonadotropin (hCG) and human
placental lactogen (hPL) are secreted by placenta
only.
(NEW NCERT 12th Page No. 37)
172. (3)
IUDs are ideal contraceptives for the females who
want to delay pregnancy and/or space children. It
is one of most widely accepted methods of
contraception in India.
(NEW NCERT 12th Page No. 45)
173. (2)
The oviducts (fallopian tubes), uterus and vagina
constitute the female accessory ducts.
(NEW NCERT 12th Page No. 29)
174. (2)
The zygote or early embryos (with upto 8
blastomeres) could be transferred into the fallopian
tube (ZIFT-zygote intra fallopian transfer) and
embryos with more than 8 blastomeres, into the
uterus (IUT - intra uterine transfer), to complete its
further development.
(NEW NCERT 12th Page No. 48)
175. (3)
Rapid secretion of LH leading to its maximum
level during the mid-cycle called LH surge induces
rupture of Graafian follicle and thereby the release
of ovum (ovulation).
(NEW NCERT 12th Page No. 35)
176. (2)
Out of the listed assisted reproductive technologies
(ARTs), three involve in vitro fertilization, where
fertilization occurs outside the body in a
laboratory: ZIFT (Zygote Intrafallopian Transfer),
ICSI (Intracytoplasmic Sperm Injection), and IUT
(Intrauterine Transfer). These techniques require
the manipulation and fertilization of the egg
outside the fallopian tubes or uterus before transfer.
(NEW NCERT 12th Page No. 48)
177. (4)
100 ova are produced from 100 secondary oocytes
and 200 sperms are produced from 100 secondary
spermatocytes.
(NEW NCERT 12th Page No. 31, 32)
178. (2)
In vitro fertilisation (IVF) is the fertilisation
occurring outside the body in almost similar
conditions as that in the body whereas in vivo
fertilization is fertilization that occurs inside the
female's body.
(NEW NCERT 12th Page No. 46)
179. (2)
List-I List-II
Trophoblast Outer layer of blastocyst
Cleavage Mitotic division of zygote
Inner cell mass Group of cells that would
differentiate as embryo
Implantation Embedding of blastocyst in
the endometrium
(NEW NCERT 12th Page No. 36, 37)
180. (2)
The correct order of events of human reproduction
is: Gametogenesis → Insemination → Fertilisation
→ Implantation → Gestation → Parturition.
Option (2) incorrectly places fertilization before
insemination and gametogenesis.
(NEW NCERT 12th Page No. 26)
181. (2)
The testis is covered by a dense covering. Each
testis has about 250 compartments called testicular
lobules. Each lobule contains one to three highly
coiled seminiferous tubules in which sperms are
produced.
(NEW NCERT 12th Page No. 27)
182. (3)
Mons pubis is a cushion of fatty tissue covered by
skin and pubic hair in females. It is not a part of the
internal genitalia, and the cushion is made up of fat,
not proteins.
(NEW NCERT 12th Page No. 30)
183. (3)
Artificial insemination is a technique where the
semen collected either from the husband or a
healthy donor is artificially introduced either into
the vagina or into the uterus.
(NEW NCERT 12th Page No. 48)
184. (3)
In human beings, after one month of pregnancy, the
embryo’s heart is formed. The first sign of growing
foetus may be noticed by listening to the heart
sound carefully through the stethoscope. By the
end of the second month of pregnancy, the foetus
develops limbs and digits. The first movements of
the foetus and appearance of hair on the head are
usually observed during the fifth month.
(NEW NCERT 12th Page No. 38)
185. (3)
The signals for parturition originate from the fully
developed foetus and the placenta which induce
mild uterine contractions called foetal ejection
reflex. This triggers release of oxytocin from the
maternal pituitary.
(NEW NCERT 12th Page No. 38)
SECTION-B
186. (2)
List-I List-II
Nirodh Sheath of latex
Diaphragm Covers cervix
Multiload 375 Contains copper
Implant Placed under skin
(NEW NCERT 12th Page No. 44)
187. (1)
Isthmus is the part of fallopian tube. Pills have to
be taken daily for a period of 21 days starting
preferably within the first five days of menstrual
cycle. After a gap of 7 days (during which
menstruation occurs) it has to be repeated in the
same pattern till the female desires to prevent
conception.
(NEW NCERT 12th Page No. 44, 45)
188. (4)
A functional mammary gland is characteristic of all
female mammals. Acrosome is present in head of
sperm.
(NEW NCERT 12th Page No. 31)
189. (4)
Secondary oocyte is actually a haploid cell, not
diploid. It is formed as a result of meiosis-I, not
meiosis-II. During ovulation, the secondary oocyte
is released and will only complete meiosis-II if
fertilization occurs.
(NEW NCERT 12th Page No. 32)
190. (1)
Copper-T is an effective contraceptive device in
human females. It increase phagocytosis of sperms
within the uterus and the Cu ions released suppress
sperm motility and the fertilising capacity of
sperms. In barrier methods, ovum and sperms are
prevented from physically meeting with the help of
barriers. Cu-T does not blocks sperm from traveling
upward from the vagina into the fallopian tubes.
(NEW NCERT 12th Page No. 44)
191. (4)
The sequence of formation of spermatozoa is:
Spermatogonia → primary spermatocytes →
secondary spermatocytes → spermatid →
spermatozoa
(NEW NCERT 12th Page No. 31)
192. (2)
A rapid decline in death rate, maternal mortality
rate (MMR) and infant mortality rate (IMR) as well
as an increase in number of people in reproducible
age cause increase in population but increased IMR
and increased MMR will cause decline in growth
rate.
(NEW NCERT 12th Page No. 43)
193. (3)
All techniques of IVF require extremely high
precision handling by specialised professionals and
expensive instrumentation. Therefore, these
facilities are presently available only in very few
centres in the country. Obviously their benefits is
affordable to only a limited number of people.
(NEW NCERT 12th Page No. 48)
194. (4)
List-I List-II
Umbilical
cord
Connects the placenta to embryo
Placenta Facilitates supply of oxygen and
nutrients to the embryo
Chorionic
villi
Finger like projections on trophoblast
Ovary Secretes relaxin hormone
(NEW NCERT 12th Page No. 37)
195. (1)
Lactational amenorrhea is a natural method of
contraception. As no medicines or devices are used
in natural methods of contraception, side effects
are almost nil. Chances of failure, though, of this
method are also high compared to other methods
like vasectomy, condoms, or IUDs.
(NEW NCERT 12th Page No. 44)
196. (3)
In the given figure, B represents the plug of
cervical mucus.
(NEW NCERT 12th Page No. 37)
197. (2)
The mode of action of implant is similar to that of
pills and their effective periods are much longer.
(NEW NCERT 12th Page No. 45)
198. (1)
The edges of the infundibulum possess finger-like
projections called fimbriae, which help in
collection of the ovum after ovulation.
(NEW NCERT 12th Page No. 29)
199. (2)
Administration of progestogens or progestogenestrogen combinations or IUDs within 72 hours of
coitus have been found to be very effective as
emergency contraceptives as they could be used to
avoid possible pregnancy due to rape or casual
unprotected intercourse.
(NEW NCERT 12th Page No. 45)
200. (3)
The uterus opens into vagina through a narrow
cervix. The cavity of the cervix is called cervical
canal which alongwith vagina forms the birth
canal.
(NEW NCERT 12th Page No. 30)
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