Class 12 Question Paper 2024 Biology

ANNUAL EXAMINATION

Question Paper
2024

NCERT BASED SYLLABUS
FOR CBSE AND STATE BOARD
FOLLOWING NCERT

Series SQR1P/1 SET-1
àíZ-nÌ H$moS>
Q.P. Code 57/1/1
amob Z§. narjmWu àíZ-nÌ H$moS> >H$mo CÎma-nwpñVH$m Ho$
Roll No. _wI-n¥ð >na Adí` {bIo§ &
Candidates must write the Q.P. Code
on the title page of the answer-book.

ZmoQ> NOTE
(I) H¥$n`m Om±M H$a b| {H$ Bg àíZ-nÌ _o§ _w{ÐV (I) Please check that this question paper
n¥ð> 23 h¢ & contains 23 printed pages.

(II) H¥$n`m Om±M H$a b| {H$ Bg àíZ-nÌ _| (II) Please check that this question paper
>33 àíZ h¢ & contains 33 questions.

(III) àíZ-nÌ _| Xm{hZo hmW H$s Amoa {XE JE (III) Q.P. Code given on the right hand
àíZ-nÌ H$moS H$mo narjmWu CÎma-nwpñVH$m Ho$ side of the question paper should be
_wI-n¥ð> na {bI| & written on the title page of the
answer-book by the candidate.
(IV) H¥$n`m àíZ H$m CÎma {bIZm ewê$ H$aZo go (IV) Please write down the serial
nhbo, CÎma-nwpñVH$m _| àíZ H$m H«$_m§H$ number of the question in the
Adí` {bI| & answer-book before attempting it.
(V) Bg àíZ-nÌ 15 {_ZQ >H$m (V) 15 minute time has been allotted to
g_` {X`m J`m h¡ & àíZ-nÌ H$m {dVaU read this question paper. The
10.15 ~Oo {H$`m OmEJm & question paper will be distributed
10.15 ~Oo go 10.30 ~Oo VH$ N>mÌ Ho$db at 10.15 a.m. From 10.15 a.m. to
10.30 a.m., the students will
àíZ- read the question paper only and
do CÎma-nwpñVH$m na H$moB© CÎma Zht {bI|Jo & will not write any answer on t he
answer-book during this period.
Ord {dkmZ (g¡ÕmpÝVH$)
BIOLOGY (Theory)

:3 : 70
Time allowed : 3 hours Maximum Marks : 70

57/1/1-11 1 P.T.O.

:

:
(i) 33

(ii)

(iii) 1 16 1

(iv) 17 21 2

(v) 22 28 3

(vi) 29 30 4

(vii) 31 33 5

(viii)

(ix)
(x)

IÊS> H$
1 16 1 16 1=16

1. {ZåZ{b{IV _| go {H$g nm¡Yo _| Za VWm _mXm nwîn XmoZm| EH$ hr nm¡Yo na nwpînV hmoVo h¢ VWm
CZ_| gOmVnwînr namJU AWdm na{ZfoMZ g§^d h¡ ?
(A) nnrVm (B) IOya (S>oQ> nm_)
(C) (D) nmbH$

2. {ZåZ{b{IV _| go H$m¡Z-gm hm°_m}Z _mZd Anam (ßb¡g|Q>m) Ûmam òm{dV hmoVm h¡ Omo gJ^©Vm
(J^m©dñWm) H$mo ~ZmE aIZo _| ghm`H$ h¡ ?
(A) [ab¡ (B) _mZd Oam`w JmoZ¡S>moQ´>m°{nZ
(C) Q>mo{gZ (D) _mZd Anam b¡ oOZ
57/1/1-11 2

General Instructions :
Read the following instructions carefully and follow them :
(i) This question paper contains 33 questions. All questions are compulsory.
(ii) Question paper is divided into five sections Sections A, B, C, D and E.
(iii) Section A questions number 1 to 16 are multiple choice type questions. Each
question carries 1 mark.
(iv) Section B questions number 17 to 21 are very short answer type questions.
Each question carries 2 marks.
(v) Section C questions number 22 to 28 are short answer type questions. Each
question carries 3 marks.
(vi) Section D questions number 29 and 30 are case-based questions. Each
question carries 4 marks. Each question has subparts with internal choice in
one of the subparts.
(vii) Section E questions number 31 to 33 are long answer type questions. Each
question carries 5 marks.
(viii) There is no overall choice. However, an internal choice has been provided in
Sections B, C and D of the question paper. A candidate has to write answer for
only one of the alternatives in such questions.
(ix) Kindly note that there is a separate question paper for Visually Impaired
candidates.
(x) Wherever necessary, neat and properly labelled diagrams should be drawn.

SECTION A

Questions no. 1 to 16 are Multiple Choice Type Questions, carrying 1 mark
each. 16 1=16

1. In which of the following plants are both male and female flowers born on
the same plant and the mode of pollination can be geitonogamy or
xenogamy ?
(A) Papaya (B) Date Palm
(C) Maize (D) Spinach

2. Which one of the following hormones is secreted by the human placenta
that helps in the maintenance of pregnancy ?
(A) Relaxin (B) Human Chorionic Gonadotropin
(C) Oxytocin (D) Human Placental Lactogen

57/1/1-11 3 P.T.O.

3. n[adma {Z`moOZ hoVw {H$gr Xån{V Ûmam AnZmB© OmZo dmbr Amd{YH$ g§`_ Ad{Y hmoZr Mm{hE :
(A) _mhdmar MH«$ Ho$ 5d| go 10d|o {XZ Ho$ ~rM
(B) _mhdmar MH«$ Ho$ 13d| go 15d|o {XZ Ho$ ~rM
(C) _mhdmar MH«$ Ho$ 10d| go 17d|o {XZ Ho$ ~rM
(D) _mhdmar MH«$ Ho$ 16d| go 20d|o {XZ Ho$ ~rM >
4. {ZåZ{b{IV go $

(A) 45 + XX
(B) 44 + XXY g_J« ê$n go _mXm bjU H$m {dH$mg
(C) 44 + XO Aënd{Y©V A§S>me` Ho$ H$maU Zmar ~m±P hmoVr h¡
(D) 44 + XY gm_mÝ` Za (nwéf)
5. Amn OmZVo hr h¢ {H$ àmH¥${VH$ ê$n go ~rg {^Þ àH$ma Ho$ Eo_rZmo Aåb nmE OmVo h¢ VWm
S>rEZE _| Mma {^Þ àH$ma Ho$ jma nmE OmVo h¢ & Eogo 3 jmam| H$m g_yh EH$ {d{eîQ> Eo_rZmo
Aåb H$m Hy$Q> boIZ H$aVm h¡ & `{X Eogm Z hmoH$a 96 {^Þ àH$ma Ho$ Eo_rZmo Aåb hmoVo VWm
S>rEZE _| 12 {^Þ àH$ma Ho$ jma hmoVo, Vmo EH$ àHy$Q> Ho$ g§`moOZ hoVw Amdí`H$ Ý`yZV_ jmam|
H$s g§»`m hmoJr :
(A) 6 (B) 8
(C) 2 (D) 4
6. EH$ `moOZmË_H$ nm°br ûm¥§Ibm _| bmBZ BgHo$ àH$ma ~§Y H$m
{Zê$nU Xem©Vr h¡ :

(A) hmBS´>moOZ ~§Y (B) noßQ>mBS> ~§Y
(C) N-½bmBH$mo{g{S>H$ ~§Y (D) \$m°ñ\$moS>mBEñQ>a ~§Y
57/1/1-11 4

3. The periodic abstinence by a couple for family planning should be from :
(A) Day 5 to 10 of menstrual cycle
(B) Day 13 to 15 of menstrual cycle
(C) Day 10 to 17 of menstrual cycle
(D) Day 16 to 20 of menstrual cycle

4. Select the incorrect match from the following :

Human Karyotype Characters
(A) 45 + XX Broad palm with characteristic palm crease
(B) 44 + XXY Overall feminine development

(C) 44 + XO Sterile females as ovaries are rudimentary
(D) 44 + XY Normal male

5. You know that there are twenty different types of naturally occurring
amino acids and four different types of bases in the DNA. A combination
of 3 such bases code for a specific amino acid. If instead there are
96 different amino acids and 12 different bases in the DNA, then the
minimum number of combination of bases required to form a codon is :
(A) 6 (B) 8
(C) 2 (D) 4

6. The type of bond represented by the dotted line in a schematic
polynucleotide chain is :

(A) Hydrogen bond (B) Peptide bond
(C) N-glycosidic linkage (D) Phosphodiester bond

57/1/1-11 5 P.T.O.

7. {ZåZ{b{IV _| go {H$g àH$ma H$s n[apñW{V`m|/amoJ _| _mZd eara _| _mñQ> H$mo{eH$mAm| H$s
A{V{H«$`merbVm (_| d¥{Õ) ào{jV hmoVr h¡ ?
(A) Q>mB\$m°BS> (B) EobOu
(C) EoñHo$[aE{gg (D) ES²>g

8. XÿY H$mo Xhr _| ñH§${XV H$aZo dmbo H$mo gm_mÝ`V: Bg dJ© _| aIVo h¢ :
(A) gm`Zmo (B) AmH$s© (AmÚ)
(C) agm`Z- (D)

9. {ZåZ{b{IV nmaOrdr O§VA w m| (Q´>m§gOo{ZH$ E{Z_ëg) _| go {H$go nmo{b`mo Ho$ Q>rHo$
H$s gwajm narjU hoVw Cn`moJ {H$`m J`m h¡ ?
(A) (B) ~H$ar
(C) gyAa (D) Myhm
10. µO qhS> II S>rEZE AUw Ho$ {d{eîQ> AZwH«$_ H$mo nhMmZ H$a {deof
{~ÝXþ na H$mQ>Vo h¢, Bg {d{eï> AZwH«$_ _| jmaH$ `w½_m| H$s g§»`m h¡ :
(A) N>h jmaH$ `w½_ (B) Mma jmaH$ `w½_
(C) gmV jmaH$ `w½_ (D) VrZ jmaH$ `w½_
11. dh g_wÞV {deofH$ Omo AmZwd§{eH$V: ê$nm§V[aV nmaOrdr \$gb JmoëS>Z amBg _|o nm`m
OmVm h¡ :
(A) _mÌm
(B)
(C) àmoQ>rZ H$s CÀM _mÌm
(D) {dQ>m{_Z-E H$s CÀM _mÌm
12. Cn^moº$mAm| Ûmam ZdrZ H$m~©{ZH$ nXmWm] Ho$ {Z_m©U, VWm emH$mhm[a`m| Ed§ AnKQ>H$m| Ho$ {bE
^r Cn^moJ hoVw CnbãY O¡d _mÌm H$mo H«$_e: {ZåZ àH$ma go ì`º$ H$aVo h¢ :
(A) gH$b àmW{_H$ CËnmXH$Vm VWm ZoQ> àmW{_H$ CËnmXH$Vm
(B) ZoQ> àmW{_H$ CËnmXH$Vm VWm {ÛVr`H$ CËnmXH$Vm
(C) {ÛVr`H$ CËnmXH$Vm VWm ZoQ> àmW{_H$ CËnmXH$Vm
(D) {ÛVr`H$ CËnmXH$Vm VWm gH$b àmW{_H$ CËnmXH$Vm
57/1/1-11 6

7. In which of the following conditions/diseases is there a substantial
increase in the activity of mast cells observed in the human body ?
(A) Typhoid (B) Allergy
(C) Ascariasis (D) AIDS

8. Lactobacillus that sets milk into curd is categorised as :
(A) Cyanobacteria (B) Archaebacteria
(C) Chemosynthetic bacteria (D) Heterotrophic bacteria

9. Which one of the following transgenic animals is being used to test the
safety of the polio vaccine ?
(A) Sheep (B) Goat
(C) Pig (D) Mice

10. Restriction Endonuclease Hind II always cuts DNA molecules at a
particular point by recognising a specific sequence of :
(A) Six base pairs (B) Four base pairs
(C) Seven base pairs (D) Three base pairs

11. The improved trait that is found in the genetically modified transgenic
crop Golden rice is :
(A) High lysine content
(B) Insect resistant
(C) High protein content
(D) High vitamin-A content

12. The rate of formation of new organic matter by consumers, and the
biomass available for consumption of herbivores as well as decomposers
are referred to as :
(A) Gross primary productivity and Net primary productivity
(B) Net primary productivity and Secondary productivity
(C) Secondary productivity and Net primary productivity
(D) Secondary productivity and Gross primary productivity
57/1/1-11 7 P.T.O.

13 16 (A)
(R) (A), (B), (C)
(D)

(A) A{^H$WZ (A) Am¡a H$maU (R) XmoZm| ghr h¢ Am¡a H$maU (R), A{^H$WZ (A) H$s
ghr ì¶m»¶m H$aVm h¡ &
(B) A{^H$WZ (A) Am¡a H$maU (R) XmoZm| ghr h¢, naÝVw H$maU (R), A{^H$WZ (A) H$s
ghr ì¶m»¶m H$aVm h¡ &
(C) A{^H$WZ (A) ghr h¡, naÝVw H$maU (R) µJbV h¡ &
(D) A{^H$WZ (A) µJbV h¡, naÝVw H$maU (R) ghr h¡ &

13. (A) : h_mao Xoe H$m H$mZyZ {eew H$mo H$mZyZZ JmoX boZo H$s BOmµOV XoVm h¡ Am¡a
`h AmO ^r g§VmZ{dhrZ X§n{V Ho$ {bE OZH$Vm àm{á H$m gdm}Îm_ Cnm`
h¡ &
(R) : ^maV _| AZmW Am¡a XrZ- ê$n go JmoX boZo _|
^mdZmË_H$, Ym{_©H$ VWm gm_m{OH$ KQ>H$ ~mYH$ Zht h¢ &

14. (A) : g§b½Z OrZ F2 _| {Ûg§H$a AZwnmV 9 : 3 : 3 : 1 Zht Xem©Vo (n[ab{jV
Zht hmoVo) h¢ &
(R) : g§b½Z (ghb½Z) OrZm| _| ñdV§Ì {dg§`moOZ Zht hmoVm &

15. (A) : AZoH$ EH$~rOnÌr nm¡Ym| H$m amoJH$maH$
h¡ &
(R) : nm¡Yo _| àgm_mÝ` H$mo{eH$mAm| H$mo Q²>`y_a _| ê$nm§V[aV H$aZo hoVw `h S>rEZE
Ho$ EH$ A§e -S>rEZE H$mo hñVm§V[aV H$aZo _| g_W© h¡ &

16. (A) : ^maV gaH$ma Zo OrE_ AZwg§YmZ g§~§Yr H$m`m] H$s d¡Ym{ZH$Vm {ZYm©aU hoVw
OrB©Egr Zm_H$ g§JR>Z H$s ñWmnZm H$s h¡ &
(R) : O~ AmZwd§{eH$V: ê$nm§V[aV Ordm| H$mo nm[aV§Ì _| à{dîQ> H$am`m OmVm h¡
Vmo CZ na
57/1/1-11 8

For Questions number 13 to 16, two statements are given one labelled as
Assertion (A) and the other labelled as Reason (R). Select the correct answer to these
questions from the codes (A), (B), (C) and (D) as given below.
(A) Both Assertion (A) and Reason (R) are true and Reason (R) is the
correct explanation of the Assertion (A).
(B) Both Assertion (A) and Reason (R) are true, but Reason (R) is not
the correct explanation of the Assertion (A).
(C) Assertion (A) is true, but Reason (R) is false.
(D) Assertion (A) is false, but Reason (R) is true.

13. Assertion (A) : The laws of our country permit legal adoption and it is as
yet, one of the best methods for childless couples looking
for parenthood.
Reason (R) : Emotional, religious and social factors are no deterrents to
the legal adoption of orphaned and destitute children in
India.

14. Assertion (A) : Linked genes do not show dihybrid F2 ratio 9 : 3 : 3 : 1.

Reason (R) : Linked genes do not undergo independent assortment.

15. Assertion (A) : Agrobacterium tumefaciens is a pathogen of several
monocot plants.
Reason (R) : It is able to deliver a piece of DNA known as T-DNA to
transform normal plant cells into a tumor.

16. Assertion (A) : Indian Government has set up an organisation known as
GEAC to decide the validity of GM research.
Reason (R) : Genetic modification of organisms has no effect when such
organisms are introduced in the ecosystem.

57/1/1-11 9 P.T.O.

IÊS> I
1
17. ZrMo Xr JB© Vm{bH$m _| A, B, C VWm D H$mo nhMm{ZE : 4 =2
2

\$b{^{Îm A
B Kmg Hw$b Ho$ ~rO H$m ~rOnÌ
^«yU Aj C
D ~rO _| ~rOm§S>H$m` H$m Adeof
18. ZrMo {XE JE {MÌ H$m àojU H$s{OE & Cg àH¥${V -d¡km{ZH$ H$m Zm_ {b{IE {OÝhmo§Zo {MÌ _|
{XE JE Ord Ho$ AmYma na Ordm| Ho$ {dH$mg H$m {gÕmÝV {X`m & {dH$mg Ho$ {bE CZH$s Xr
JB© ì`m»`m ^r {b{IE & 2

19. g§VmZhrZ `wJbm| Ho$ ghm`VmW© ghm`H$ OZZ àm¡Úmo{JH$s (EAmaQ>r) H$m`©H«$_ _| AnZmE OmZo
dmbo _yb MaUm| H$m CëboI H$s{OE & Bgo naIZbr {eew (Q>oñQ> Q²>`y~ ~o~r) H$m`©H«$_ ^r
? 2
20. (H$) IoV _| H$m_ H$aVo g_` EH$ {H$gmZ H$mo EH$ {df¡bo gm±n Zo H$mQ> (S>g) {b`m &
Cgo$ A{dbå~ hr g_rn Ho$ ñdmñÏ` Ho$ÝÐ bo Om`m J`m Ohm± CgH$m OrdZ ~MmZo
hoVw {M{H$ËgH
1
(i) ? 1
2
1
(ii) àH$ma H$s à{Vajm àXmZ H$s JB© ?
2
AWdm
(I) A
Zht H$aVo ? H$maU g{hV ì`m»`m H$s{OE & 2

57/1/1-11 10

SECTION B

1
17. Identify A, B, C and D in the table given below : 4 =2
2
Terms Part of the plant it represents
Pericarp
Cotyledon in seed of grass family
Embryonal axis
Remains of nucellus in a seed

18. Observe the picture given below. Name the naturalist and write the
explanation given by him that evolution of life forms had occurred on the
basis of this example. 2

19. Write the basic steps followed in the Assisted Reproductive Technologies
(ART) programme to help childless couples. Why is it also known as test
tube baby programme ? 2

20. (a) A farmer while working on his farm was bitten by a poisonous
snake. He was rushed to a nearby health centre where the doctor
gave him an injection to save his life.
1
(i) What did the doctor inject and why ? 1
2
1
(ii) Name the kind of immunity provided by this injection.
2
OR
(b) Why do organic farmers not recommend complete eradication of
insect pests ? Explain giving reason. 2

57/1/1-11 11 P.T.O.

21. ZrMo {XE JE O¡d_mÌm Ho$ {nam{_S> H$m AÜ``Z H$s{OE & Eogr Xmo pñWV \$gb)
Ho$ Zm_ {b{IE Omo ñVa VWm ñVa _| nmB© Om gH$Vr h¢ & Bg àH$ma Ho$ {nam{_S> H$m
Zm_ {bIH$a Cg nm[aV§Ì H$m Zm_ {b{IE {Og_| `h nm`m OmVm h¡ & 2

IÊS> J

22. _{hbmAm| Ûmam br OmZo dmbr J^©{ZamoYr Jmo{b`m| ({nëg) H$s {H«$`m{d{Y Ho$ VarHo$ H$s
ì`m»`m H$s{OE & BZHo$ à^mdH$mar n[aUm_ àmá H$aZo hoVw AnZm`r OmZo dmbr {Z`V
g_`-gmaUr H$m CëboI H$s{OE & 3

23. (H$) Cg àH$ma Ho$ S>rEZE H$m Zm_ VWm Xmo A{^bjU {b{IE Omo S>rEZE A§Jw{bN>mnr
(S>rEZE q\$JaqàqQ>J) VH$ZrH$ H$m AmYma ~ZmVo h¢ & 1+1

1 1
(I) Bg VH$ZrH$ Ho$ H$moB© Xmo AZwà`moJm| H$m CëboI H$s{OE & +
2 2

24. (H$) Eg.Eb. {_ba Ûmam {H$E JE à`moJ H$s gmW©H$Vm H$s ì`m»`m H$s{OE & CZ
d¡km{ZH$m| Ho$ Zm_ {b{IE {OZHo$ àñVmdm| (n[aH$ënZm) Zo {_ba H$mo Bg à`moJ H$mo
1
H$aZo Ho$ {bE ào[aV {H$`m & 2
2

1
(I) CëH$mqnS> {díbofU Bg n[aH$ënZm H$m g_W©Z {H$g àH$ma H$aVm h¡ ?
2

57/1/1-11 12

21. Study the diagram of a pyramid of biomass given below. Name the two
Name
this type of pyramid and the ecosystem in which it is found. 2

SECTION C

22. Explain the mode of action of contraceptive pills taken by human

females. Mention the schedule to be followed for effective outcome. 3

23. (a) Name and write two characteristics of the type of DNA that forms

the basis of DNA fingerprinting technique. 1+1

1 1
(b) Mention any two applications of this technique. +
2 2

24. (a) Explain the significance of the experiment carried out by

S.L. Miller. Name the scientists whose hypothesis prompted him to
1
carry out this experiment. 2
2

1
(b) How does meteorite analysis favour this hypothesis ?
2

57/1/1-11 13 P.T.O.

25. ZrMo Xr JB© Vm{bH$m _| A, B, C, D, E VWm F H$mo nhMmZ H$a CZHo$ Zm_ {b{IE : 3

Ý`y_mo{Z`m
aXX©, Am_me`
Q>mB\$m°BS>
gm_mÝ` OwH$m_ amBZmodm`ag
eara Ho$ {d{^ÝZ ^mJm| _| gyIr, eëH$s
XmX ([a¨Jd_©) {dj{V`m± (ñHo$br brOZ), bmb hmoZm
VWm IwObr
EoñHo$[aE{gg
H$ãO
dmbm _b

26. EH$ n[adma _| {nVm, nwÌr VWm nwÌ dUm©Y h¢, O~{H$ _m± gm_mÝ` X¥pîQ> dmbr h¡ (dUmªY Zht
h¡) & AmB© h¡ ?
AnZo CÎma H$s Ý`m`g§JVVm {gÕ H$aZo hoVw EH$ H«$m°g ~ZmBE & 3

27. (H$) (i) ? 1

(ii) gd©àW_ {Z{_©V nmaOrdr Jm` H$m Zm_ {b{IE VWm BgHo$ _hÎd H$m CëboI
H$s{OE & 2

AWdm
(I) (i) B©H$mo Ama I (EcoRI) Ho$ Zm_H$aU hoVw AnZmB© JB© na§nam H$s ì`m»`m
H$s{OE & 2

(ii) Ho$db AmaoI H$s ghm`Vm go B©H$mo Ama I H$s S>rEZE nm°br na
{H«$`m H$mo àX{e©V H$s{OE & 1

28. (H$) `h H¡$go gw{ZpíMV hmoVm h¡ {H$ Am°{H©$S> H$m namJU EH$ {d{eîQ Om{V H$s>
_{jH$m Ûmam hr hmo ? ì`m»`m H$s{OE & 2

(I) Bg CXmhaU H$s ghm`Vm go gh-{dH$mg H$m dU©Z H$s{OE & 1

57/1/1-11 14

25. Identify A, B, C, D, E and F in the table given below : 3

Name of Human Disease Causative Organism Symptoms

Pneumonia Streptococcus
Typhoid High fever, weakness,
headache, stomach
pain
Common Cold Rhino virus
Ringworm Dry scaly lesions on
body parts, redness,
itching
Ascariasis Ascaris
Entamoeba Constipation, cramps,
histolytica stools with mucous
and blood clots

26. In a family, the father, the daughter and the son are colour blind,
whereas the mother has normal vision. Do you think the son and the
daughter have inherited the disease from their father ? Work out a cross
to justify your answer. 3

27. (a) (i) What are transgenic animals ? 1

(ii) Name the first transgenic cow and state its importance. 2
OR
(b) (i) Explain the convention for naming EcoRI. 2

(ii) With the help of an illustration only, show the action of
EcoRI on a DNA Polynucleotide. 1

28. (a) Explain how it is ensured that the orchid Ophrys is pollinated by a
specific species of bee. 2

(b) Describe co-evolution with the help of this example. 1
57/1/1-11 15 P.T.O.

IÊS> K
29 30 3

29. ZrMo {XE JE àíZm| Ho$ CÎma Xr{OE & 4

`h A{dídgZr` (AmíM`©OZH$) Zht h¡ {H$ ^maV H$m ^y{_joÌ {díd Ho$ Hw$b ^y{_joÌ
H$m Ho$db 2·4% h¡ O~{H$ BgH$s d¡pídH$ OmVr` {d{dYVm à^mdembr ê$n go 8·1% h¡ !
naÝVw ñnrerµO (Om{V`m|) Ho$ Bg AmH$bZ _| àmoH¡$[a`moQ²>g H$s g§»`m H$m CëboI H$ht ^r
Zht h¡ &
Ord-{dkmZr h_oem go hr {díd Ho$ {d{^ÝZ joÌm| H$s OmVr` {d{dYVm go g§~§{YV Am± m|
H$m g§J«h H$aZo _| gOJ/{Okmgw aho h¢ & Xþ{Z`m Ho$ VrZ AbJ-AbJ joÌm| _| ñVZYm[a`m| Ho$
{d{^ÝZ dJm] H$s Om{V`m| H$s joÌr` {d{dYVm Ho$ {bE EH$Ì Am±
J«m\$ Ûmam Xem©`m J`m h¡ :

(H$) ~ma J«m\$ _| joÌ III _| OmVr` {d{dYVm (g ? 1
AWdm
(H$) ~ma J«m\$ _| joÌ I _| OmVr` {d{dYVm (g_ ? 1

(I) nm¡Ym| VWm OÝVwAm| H$s {d{dYVm {díd _| EH$g_mZ Zht h¡ `Wm Ag_mZ {dVaU

h¢ & 1

(J) àm{U`m| H$s Vah CZH$s àOm{V`m| H$s
{d{dYVm H$s AZw_m{ZV g§»`m Zht hmoVr h¡ ? ñnîQ> H$s{OE & 2

57/1/1-11 16

SECTION D

Questions No. 29 and 30 are case-based questions. Each question has
3 sub-questions with internal choice in one sub-question.

29. Read the following passage and answer the questions that follow. 4

total land area whereas its share of the global species diversity is an
impressive 8·1 per cent ! However, in these estimates of species,
prokaryotes do not figure anywhere.

Biologists are always keen on collecting data with respect to species
diversity observed in different regions of the world. The data collected
based on the survey conducted for species richness of groups of
mammals in three different regions of the world is shown in the bar
graph given below :

(a) Why is the species richness maximum in Region III in the bar
graph ? 1
OR
(a) Why is the species richness minimum in Region I in the bar graph ? 1
(b) Plants and animals do not have uniform diversity in the world but
show rather uneven distribution. Mention what this kind of diversity
is referred to as. 1
(c) Why is it that prokaryotes do not have an estimated number of their
species diversity as seen in plants and animals ? Explain. 2
57/1/1-11 17 P.T.O.

30. ZrMo {XE JE AmaoI H$m AÜ``Z H$s{OE {Og_| ê$nm§V[aV OrdmUwAm| Ho$ M`Z H$s H$m`©{d{Y
Ho$ {d{^ÝZ MaUm| H$mo Xem©`m J`m h¡ & BgHo$ AmYma na {XE JE AJ«Jm_r àíZm| Ho$ CÎma
Xr{OE :

(H$) Cg {Zdh (H$m°bmoZr) H$mo nhMm{ZE Omo ê$nm§V[aV hþB© h¡ & CÎma H$s Ý`m`g§JVVm
1 1
{gÕ H$s{OE & +
2 2

(I) ßbmpµÁ B
à{V à{VamoYr OrZm| H$m {ZdoeZ {H$`m OmVm h¡ ? AmZwd§{eH$ B§Or{Z`[a¨J _| CZH$s
^y{_H$m H$m CëboI H$s{OE & 2

(J) AmZwd§{eH$ B§Or{Z`[a¨J _| _hÎdnyU© ^y{_H$m {Z^mZo dmbo Xmo E§µOmB_m| Ho$ Zm_
{b{IE & 1

AWdm
(J) {Zdoer {ZpîH«$`Vm (BZge©Zb B Z) _| -J¡bo µO H$s ^y{_H$m
{b{IE & 1

57/1/1-11 18

30. Study the diagram given below that shows the steps involved in the
procedure of selecting transformed bacteria and answer the questions
that follow :

1 1
(a) Identify the colony that has got transformed. Justify your answer. +
2 2

(b) What are the sites in a plasmid called where ampicillin and
tetracycline resistance genes are inserted ? State their role in genetic
engineering. 2

(c) Name two enzymes playing an important role in genetic
engineering. 1

OR

(c) State the role of -galactosidase in insertional inactivation. 1

57/1/1-11 19 P.T.O.

IÊS> L>

31. (H$) (i) EH$ Amd¥V~rOr (E|{O`moñn_©) _| Za `w½_H$moX²{^X² Ho$ {dH$mg H$s ì`m»`m
1
H$s{OE & 2
2
1
(ii) EH$ VrZ-H$mo{eH$s` Za `w½_H$moX{² ^X² H$m Zm_m§{H$V {MÌ ~ZmBE & 2
2
AWdm
(I) (i) _mZd ñÌr Ho$ A§S>me` H$s AmaoIr` H$mQ> H$m Ñí` Xem©Vo hþE {MÌ ~ZmH$a
{ZåZ{b{IV ^mJm| H$mo Zm_m§{H$V H$s{OE : 2

(1) é{Ya dm{hH$mE±
(2) àmW{_H$ nwQ>H$
(3) V¥Vr`H$ nwQ>H$
(4) A§S>mUw
(ii) _mZd ñÌr Ho$ OrdZ H$mb H$s {H$g AdñWm _| àmW{_H$ nwQ>H$m| H$m {Z_m©U
1
hmoVm h¡ ?
2
(iii) A§S>moËgJ© go AJbm AmV©d MH«$ hmoZo VH$ H$s hm°_m}Zr VWm g§aMZmË_H$
1
n[aKQ>ZmAm| H$s ì`m»`m H$s{OE & 2
2

32. (H$) AmZwd§{eH$s Ho$ àmapå^H$ à`moJm| _| go EH$ à`moJ Ûmam gwñnîQ> hmo J`m Wm {H$
AmZwd§{eH$ nXmW© H$m ñWm`r hmoZm CgH$m EH$ _hÎdnyU© A{^bjU h¡ & Cg
d¡km{ZH$ H$m Zm_ {b{IE {OZHo$ à`moJ Ûmam `h {gÕ hmo gH$m & à`moJ H$m dU©Z
H$s{OE VWm CgHo$ {ZîH$f© H$m dU©Z H$s{OE & 5

AWdm
(I) AmnH$mo ~¢JZr \y$bm| dmbm _Q>a H$m EH$ b§~m nm¡Ym {X`m J`m {OgH$m OrZràê$n
(OrZmoQ>mBn) kmV Zht h¡ & nm¡Ym| _| Ho$db ñdnamJU Ho$ Ûmam {H$E JE {d{^ÝZ H«$m°gm|
H$s ghm`Vm go nm¡Yo H$m OrZràê$n (OrZmoQ>mBn) kmV H$s{OE & AnZo Ûmam ~ZmE JE
àË`oH$ H«$m°g H$m OrZràê$nr (OrZmoQ>mBn) VWm Ñí`àê$nr (\$sZmoQ>mBn) AZwnmV
{b{IE & 5
57/1/1-11 20

SECTION E

31. (a) (i) Explain the development of male gametophyte in an
1
angiosperm. 2
2
1
(ii) Draw a labelled diagram of a three-celled male gametophyte. 2
2

OR

(b) (i) Draw a diagrammatic sectional view of ovary of human
female and label the following : 2
(1) Blood vessels
(2) Primary follicle
(3) Tertiary follicle
(4) Ovum
(ii) At which stage of life are primary follicles formed in a human
1
female ?
2
(iii) Explain the events (both hormonal and structural) that occur
at the time of ovulation till the onset of the next menstrual
1
cycle. 2
2

32. (a) Stability, as one of the properties of genetic material, was very
evident in one of the very early experiments in genetics. Name the
scientist and describe his experiment. State the conclusion he arrived
at. 5

OR

(b) A tall pea plant bearing violet flowers with unknown genotype is
given. Find the genotype by working out different crosses only by
selfing the plants. Write the genotypic and phenotypic ratios of each
cross shown by you. 5
57/1/1-11 21 P.T.O.

33. (H$) (i) H$mo{eH$mAm| Ho$ Cg A{^bjU H$m Zm_ {bIH$a ì`m»`m H$s{OE Omo
àgm_mÝ` H$mo{eH$mAm| _| Vmo A{^b{jV hmoVm h¡ naÝVw H¢$ga H$mo{eH$mAm| _|
1
bwßV hmo OmVm h¡ & 1
2
(ii) _mZd H$s g^r àgm_mÝ` H$mo{eH$mAm| _| do OrZ hmoVo h¢ Omo {d{eîQ>
n[apñW{V`m| _| H¢$gaOZr hmo gH$Vo h¢ & CZH$m Zm_ {b{IE VWm ~VmBE {H$
do H¡$go Cn`w©º$ ê$n _| ì`dhma H$aVo h¢ & 1

(iii) H¢$ga Ho$ A{^kmZ VWm {ZXmZ _| {ZåZ{b{IV VH$ZrH$m| H$s ^y{_H$m H$m
CëboI H$s{OE :
(1) Ordy{Vnarjm (~m`moßgr) VWm D$VH$ {dH¥${V ({hñQ>mon¡Wmobm°Or) 1
1
(2) Mw§~H$s` AZwZmXr B_oqOJ (_¡½Zo{Q>H$ aoµOmoZ|g B_oqOJ) 1
2
AWdm
(I) ZJam| Ed§ eham| go à{V{XZ dm{hV _b EH$ ~hþV ~S>r _mÌm _| O{ZV hmoVm h¡ VWm
Bgo H$_ àXÿ{fV ~ZmZo Ho$ {bE BgH$m CnMma dm{hV _b CnMma g§`§Ìm| (STP) _|
{H$`m OmVm h¡ & dm{hV _b CnMma g§`§Ìm| Ho$ {d{^ÝZ MaUm| H$mo ZrMo {XE JE àdmh
AmaoI Ûmam Xem©`m J`m h¡ &
Bg àdmh AmaoI H$m AÜ``Z H$a ZrMo {XE JE àíZm| Ho$ CÎma Xr{OE :
àmW{_H$ ~{h:òmd dm`wdr` Q>¢H$mo§ _o§ go JwµOmam OmVm h¡

~{h:òmd H$mo Adgm{XV H$aZo hoVw {Z:gmXZ (g¡Q>qbJ) Q>¢H$m| _| ^oOm OmVm h¡
(i) (1) àmW{_H$ ~{h:òmd § JwµOmam OmVm h¡ ? 1
(2) {Z{_©V AdgmX ? BgHo$ _hÎd H$m CëboI
H$s{OE & 1
(3) CnMm[aV ~{h:òmd H$mo àmH¥${VH$ Ob òmoVm| _| àdm{hV H$aZo go nyd©
{Z:gmXZ Q>¢H$ _| A§{V_ MaU H$s ì`m»`m H$s{OE & 1

(ii) {d{^ÝZ Ord-OJVm| Ho$ {H$Ýht Xmo Ordm| Ho$ Zm_ {b{IE {OZH$m Am_ Vm¡a na
Cn`moJ O¡d-Cd©aH$m| Ho$ ê$n _| {H$`m OmVm h¡ & {b{IE {H$ BZ_| go àË`oH$
Ord O¡d-Cd©aH$ Ho$ ê$n _| H¡$go H$m`© H$aVm h¡ & 2
57/1/1-11 22

33. (a) (i) Name and explain the property present in normal cells but is
1
lost in cancer cells. 1
2

(ii) All normal human cells have genes that may become
cancerous under certain conditions. Name them and explain
how. 1
(iii) State the role of the following techniques in detection and
diagnosis of cancer :

(1) Biopsy and Histopathology 1
1
(2) Magnetic Resonance Imaging 1
2

OR
(b) Large quantities of sewage are generated every day in cities as well
as in towns and are treated in Sewage Treatment Plants (STPs) to
make them less polluting. Given below is the flow diagram of stages
of STP.
Study the flow diagram and answer the questions that follow :

Primary effluent passed into large aeration tanks

Effluent passed into settling tanks to form sediment

(i) (1) Why is primary effluent passed into large aeration
tanks ? 1
(2) What is the sediment formed, referred to as ? Mention
its significance. 1
(3) Explain the final step in the settling tank before the
treated effluent is released into water bodies. 1
(ii) Name any two organisms commonly used as biofertilisers,
belonging to different kingdoms. Write how each one acts as
a biofertiliser. 2

57/1/1-11 23 P.T.O.

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