SET-2

Series SGN H$moS> Z§.

Code No. 57/2
amob Z§. narjmWu H$moS >H$mo CÎma-nwpñVH$m Ho$ _wI-n¥ð
Roll No. >na Adí` {bIo§ &
Candidates must write the Code on the
title page of the answer-book.

 H¥$n`m Om±M H$a b| {H$ Bg àíZ-nÌ _o§ _w{ÐV n¥ð> 11 h¢ &

 àíZ-nÌ _| Xm{hZo hmW H$s Amoa {XE JE H$moS >Zå~a H$mo N>mÌ CÎma-nwpñVH$m Ho$ _wI-n¥ð> na
{bI| &
 H¥$n`m Om±M H$a b| {H$ Bg àíZ-nÌ _| >26 àíZ h¢ &
 H¥$n`m àíZ H$m CÎma {bIZm ewê$ H$aZo go nhbo, àíZ H$m H«$_m§H$ Adí` {bI| &
 Bg àíZ-nÌ H$mo n‹T>Zo Ho$ {bE 15 {_ZQ >H$m g_` {X`m J`m h¡ & àíZ-nÌ H$m {dVaU nydm©•
_| 10.15 ~Oo {H$`m OmEJm & 10.15 ~Oo go 10.30 ~Oo VH$ N>mÌ Ho$db àíZ-nÌ H$mo n‹T>|Jo
Am¡a Bg Ad{Y Ho$ Xm¡amZ do CÎma-nwpñVH$m na H$moB© CÎma Zht {bI|Jo &
 Please check that this question paper contains 11 printed pages.
 Code number given on the right hand side of the question paper should be
written on the title page of the answer-book by the candidate.
 Please check that this question paper contains 26 questions.
 Please write down the Serial Number of the question before
attempting it.
 15 minute time has been allotted to read this question paper. The question
paper will be distributed at 10.15 a.m. From 10.15 a.m. to 10.30 a.m., the
students will read the question paper only and will not write any answer on
the answer-book during this period.

Ord {dkmZ (g¡ÕmpÝVH$)

BIOLOGY (Theory)

{ZYm©[aV g_` : 3 KÊQ>o A{YH$V_ A§H$ : 70

Time allowed : 3 hours Maximum Marks : 70

57/2 1 P.T.O.
gm_mÝ` {ZX}e :
(i) àíZ-nÌ _| nm±M IÊS>m| _§o 26 àíZ {XE JE h¢ & g^r àíZ A{Zdm`© h¢ &
(ii) IÊS> A _| àíZ g§»`m 1 go 5 A{V bKw-CÎmar` àíZ h¢, àË`oH$ àíZ 1 A§H$ H$m h¡ &
(iii) IÊS> B _| àíZ g§»`m 6 go 10 bKw-CÎmar` àíZ àH$ma I Ho$ h¢, àË`oH$ àíZ 2 A§H$m| H$m
h¡ &
(iv) IÊS> C _| àíZ g§»`m 11 go 22 bKw-CÎmar` àíZ àH$ma II Ho$ h¢, àË`oH$ àíZ 3 A§H$m|
H$m h¡ &
(v) IÊS> D _| àíZ g§»`m 23 _yë` AmYm[aV àíZ 4 A§H$m| H$m h¡ &
(vi) IÊS> E _| àíZ g§»`m 24 go 26 XrK©-CÎmar` àíZ h¢, àË`oH$ àíZ 5 A§H$m| H$m h¡ &
(vii) àíZ-nÌ _| g_J« na H$moB© {dH$ën Zht h¡, {\$a ^r 2 A§H$m| dmbo EH$ àíZ _|, 3 A§H$m| dmbo
EH$ àíZ _| Am¡a 5 A§H$m| dmbo g^r VrZm| àíZm| _| ^rVar M`Z-{dH$ën {XE JE h¢ & àË`oH$
narjmWu H$mo Eogo àíZm| Ho$ Xmo {dH$ënm| _§o go H$moB© EH$ àíZ hb H$aZm h¡ &

General Instructions :
(i) There are a total of 26 questions and five sections in the question paper.
All questions are compulsory.
(ii) Section A contains questions number 1 to 5, very short-answer type
questions of 1 mark each.
(iii) Section B contains questions number 6 to 10, short-answer type I
questions of 2 marks each.
(iv) Section C contains questions number 11 to 22, short-answer type II
questions of 3 marks each.
(v) Section D contains question number 23, value based question of 4 marks.
(vi) Section E contains questions number 24 to 26, long-answer type questions
of 5 marks each.
(vii) There is no overall choice in the question paper, however, an internal
choice is provided in one question of 2 marks, one question of 3 marks and
all the three questions of 5 marks. In these questions, an examinee is to
attempt any one of the two given alternatives.

57/2 2
 IÊS> A
SECTION A

1. àmH²$-B§gw{bZ _| hmoZo dmbo Cg amgm`{ZH$ n[adV©Z H$m C„oI H$s{OE {OgHo$ Ûmam dh
n[anŠd B§gw{bZ H$s Vah H$m`© H$aZo _| gj_ hmo OmVm h¡ & 1
Mention the chemical change that proinsulin undergoes, to be able to act
as mature insulin.

2. {ZåZ{b{IV Ho$ Zm_ {b{IE : 1

(a) 15 {_{b`Z df© nyd© dZ_mZwf (Eon) Ho$ g_mZ àmB_oQ>

(b) 2 {_{b`Z df© nyd© nydu A\«$sH$m Ho$ Kmg-ñWbm| _| ahZo dmbo àmB_oQ>

Write the names of the following :

(a) A 15 mya primate that was ape-like

(b) A 2 mya primate that lived in East African grasslands

3. Xmo amoJm| Ho$ Zm_ {b{IE {OZH$m àgma ES>rµO _ÀN>am| Ho$ CÝ_ybZ Ho$ Ûmam {Z`§{ÌV {H$`m Om
gH$Vm h¡ & 1

Name two diseases whose spread can be controlled by the eradication of

Aedes mosquitoes.

4. _mZd _| gmBQ>moH$mBZ amoY _mZd _| {H$g àH$ma ghO à{Vajm àXmZ H$aVo h¢ ? 1
How do cytokine barriers provide innate immunity in humans ?

5. dh Xmohao CÔoí` {b{IE {OZH$s ~hþbH$sH$aU _| ny{V© S>rAm°ŠgramB~moÝ`ypŠb`mogmBS>

Q´>mB\$m°ñ\o$Q> H$aVo h¢ & 1

Write the dual purpose served by Deoxyribonucleoside triphosphates in

polymerisation.

57/2 3 P.T.O.
 IÊS> B
SECTION B

6. (a) {hamoBZ S´>J Ho$ òmoV nm¡Yo H$m Zm_ {b{IE & `h nm¡Yo go {H$g àH$ma àmßV H$s OmVr
h¡ ?
(b) _mZd eara na {hamoBZ Ho$ à^mdm| H$mo {b{IE & 2
(a) Name the source plant of heroin drug. How is it obtained from the
plant ?
(b) Write the effects of heroin on the human body.
7. AmnH$mo A{YH$ CnO dmbr Q>_mQ>a H$s EH$ ZB© {H$ñ_ àmßV hþB© h¡ & Cg VH$ZrH$ H$m Zm_
{b{IE {OgHo$ Ûmam Q>_mQ>a µ\$gb H$s ^mdr nr{‹T>`m| H$s ~‹S>r g_{ï>`m| _| dm§{N>V bjUm| H$s
{Za§VaVm ~ZmE aIZo H$mo gw{ZpíMV {H$`m Om gHo$ & Bg {d{Y H$s ì`m»`m ^r H$s{OE & 2
You have obtained a high yielding variety of tomato. Name and explain
the procedure that ensures retention of the desired characteristics
repeatedly in large populations of future generations of the tomato crop.
8. Eogm _mZm OmVm h¡ {H$ {H$gr g_{ï> _| EH$ OrZ H$s Eobrb Amd¥{Îm`m± nr‹T>r Xa nr‹T>r
EH$g_mZ ahVr h¢ & hmS>u-doZ~J© Zo ~rOJ{UVr` g_rH$aU H$s ghm`Vm go BgH$s ì`m»`m
{H$g àH$ma H$s ? 2
AWdm
`Ú{n Agr_Ho$ÝÐH$s H$mo{eH$m _| ñnï> Ho$ÝÐH$ Zht hmoVm, {\$a ^r S>r.EZ.E. nyar H$mo{eH$m _|
\¡$bm Zht hmoVm & ì`m»`m H$s{OE & 2
With the help of an algebraic equation, how did Hardy-Weinberg explain
that in a given population the frequency of occurrence of alleles of a gene
is supposed to remain the same through generations ?

OR
Although a prokaryotic cell has no defined nucleus, yet DNA is not
scattered throughout the cell. Explain.

9. g§.am. A_o[aH$m Ho$ AH$m©Q>m, H¡${b\$mo{Z©`m, Ho$ ‘AH$m©Q>m H$ÀN> Ho$ {_Ì’ Zm_H$ ZmJ[aH$ g_yh
Zo EH$sH¥$V An{eï> Ob CnMma Ûmam H$ÀN> ^y{_ Ho$ Ob H$s JwUdÎmm gwYmaZo _| {H$g àH$ma
ghm`Vm H$s ? Mma MaUm| _| BgH$s ì`m»`m H$s{OE & 2
How did a citizen group called Friends of Arcata Marsh, Arcata,
California, USA, help to improve water quality of the marshland using
Integrated Waste Water Treatment ? Explain in four steps.

57/2 4
10. {~Zm-\$brXma ñWbr` µ\$gb H$mo CJmZo Ho$ {bE {_Å>r _| ZmBQ´>moOZ H$s _mÌm _| gwYma hoVw
AmnH$s gbmh _m±Jr JB© h¡ &
(a) Eogo Xmo gyú_Ordm| H$s AZwe§gm H$s{OE Omo {_Å>r _| ZmBQ´>moOZ H$m g§dY©Z H$a gH|$ &
(b) \$brXma µ\$gbm| H$mo {_Å>r Ho$ Bg àH$ma Ho$ g§dY©Z H$s Amdí`H$Vm Š`m| Zht hmoVr ? 2

Your advice is sought to improve the nitrogen content of the soil to be

used for cultivation of a non-leguminous terrestrial crop.
(a) Recommend two microbes that can enrich the soil with nitrogen.
(b) Why do leguminous crops not require such enrichment of the soil ?

IÊS> C
SECTION C

11. A{ZfoH$\$bZ VWm A{ZfoH$OZZ _| {d^oX H$s{OE & àË`oH$ H$m EH$-EH$ CXmhaU ^r Xr{OE & 3
Differentiate between Parthenocarpy and Parthenogenesis. Give one
example of each.

12. {M{H$Ëgm H$s Ñ{ï> go g^r `wdm _mVmAm| H$mo `h gbmh Xr OmVr h¡ {H$ CZHo$ ZdOmV
{eewAm| Ho$ {bE ñVZnmZ gdm}Îm_ h¡ & Š`m Amn Bggo gh_V h¢ ? H$maU g{hV AnZo CÎma
H$s nw{ï> H$s{OE & 3
Medically it is advised to all young mothers that breastfeeding is the best
for their newborn babies. Do you agree ? Give reasons in support of your
answer.

13. nyU© {dH${gV (n[anŠd) _mZd ewH«$mUw H$m {MÌ ~ZmBE & BgHo$ VrZ ^mJm| H$mo Zm_m§{H$V H$a
CZHo$ H$m`© {b{IE & 3
Draw a diagram of a mature human sperm. Label any three parts and
write their functions.

14. (a) dr.EZ.Q>r.Ama. H$m nyam Zm_ {b{IE VWm S>r.EZ.E. q\$JaqàqQ>J (S>r.EZ.E.
A§Jw{bN>mnr) _| BgH$s ^y{_H$m H$m dU©Z H$s{OE &
(b) S>r.EZ.E. A§Jw{bN>mnr VH$ZrH$ Ho$ H$moB© Xmo AZwà`moJ {b{IE & 3
(a) Expand VNTR and describe its role in DNA fingerprinting.
(b) List any two applications of DNA fingerprinting technique.

57/2 5 P.T.O.
15. (a) O¡{dH$ {H$gmZ amoJm| Ed§ nr‹S>H$m| Ho$ {Z`§ÌU Ho$ {bE agm`Zm| H$s Anojm O¡d {Z`§ÌU
H$mo dar`Vm XoVo h¢ & Am¡{MË` {gÕ H$s{OE &
(b) O¡d {Z`§ÌH$ Ho$ ê$n _| Cn`moJ {H$E OmZo dmbo OrdmUw, H$dH$ Ed§ H$sQ> H$m EH$ -EH$
CXmhaU Xr{OE & 3
(a) Organic farmers prefer biological control of diseases and pests to
the use of chemicals for the same purpose. Justify.
(b) Give an example of a bacterium, a fungus and an insect that are
used as biocontrol agents.

16. nwZ`m}JO S>r.EZ.E. àm¡Úmo{JH$s _| {ZåZ{b{IV H$s ^y{_H$m H$s ì`m»`m àË`oH$ Ho$ EH$ -EH$
CXmhaU H$s ghm`Vm go H$s{OE : 3
(a) à{V~§YZ E§µOmB_
(b) ßbmpµÁ_S>
Explain the roles of the following with the help of an example each in
recombinant DNA technology :
(a) Restriction Enzymes
(b) Plasmids

17. newnmbZ _| ~{h…àOZZ, ~{h…g§H$aU VWm nma-àOZZ (g§H$aU) nÕ{V`m| H$s ì`m»`m
H$s{OE & 3
Explain out-breeding, out-crossing and cross-breeding practices in animal
husbandry.

18. n{j`m| _| ‘qbJ-{ZYm©aU’ H$s {H«$`m{d{Y H$s ì`m»`m H$s{OE & _mZdm| _| qbJ-{ZYm©aU go `h
{H$g àH$ma {^Þ h¡ ? 3
Explain the mechanism of ‘sex determination’ in birds. How does it differ
from that of human beings ?

19. (a) ~m`mo[aEoŠQ>a H$m {dH$mg O¡d-àm¡Úmo{JH$s _| {H$g àH$ma ghm`H$ hþAm ?

(b) gdm©{YH$ Cn`moJ _| AmZo dmbo ~m`mo[aEoŠQ>a H$m Zm_ {bIH$a CgH$s H$m`©{d{Y H$m
dU©Z H$s{OE & 3
(a) How has the development of bioreactor helped in biotechnology ?
(b) Name the most commonly used bioreactor and describe its
working.
57/2 6
20. V§~mHy$ Ho$ nm¡Ym| _| {_ëdmS>oJmBZ BZH$moJZr{e`m Ho$ g§H«$_U Ho$ {Z`§ÌU _| EJ«mo~¡ŠQ>r[a`_ H$m
g§dmhH$ Ho$ ê$n _| Cn`moJ {H$g àH$ma ghm`H$ ahm h¡ ? ghr AZwH«$_ _| ì`m»`m H$s{OE & 3
How has the use of Agrobacterium as vectors helped in controlling
Meloidegyne incognitia infestation in tobacco plants ? Explain in correct
sequence.

21. (a) g_ê$n VWm g_OmV g§aMZmAm| _| {d^oX H$s{OE &

(b) {ZåZ{b{IV gyMr _| go g_ê$n g§aMZmAm| H$m M`Z H$aHo$ {b{IE : 3
(i) {VVbr Ed§ n{j`m| Ho$ n§I
(ii) H$eoéH$s öX`
(iii) ~m¡JoZ{d{b`m Ed§ Hw$Hw$a{~Q>m Ho$ àVmZ
(iv) eH$aH§$X Am¡a Amby Ho$ H§$X
(a) Differentiate between analogous and homologous structures.
(b) Select and write analogous structures from the list given below :
(i) Wings of butterfly and birds
(ii) Vertebrate hearts
(iii) Tendrils of bougainvillea and cucurbita
(iv) Tubers of sweet potato and potato

22. (a) ‘‘Zm°d} H$s Anojm ^maV _| nm[aV§Ì {d{dYVm A{YH$ h¡ &’’ Š`m Amn Bg H$WZ go
gh_V h¢ ? H$maU ~VmVo hþE AnZo CÎma H$s nw{ï> H$s{OE &
(b) AmZwd§{eH$ O¡d-{d{dYVm VWm OmVr` (ñnrerµO) O¡d-{d{dYVm _| A§Va {b{IE Omo
O¡{dH$ g§JR>Z Ho$ g^r ñVam| _| n[ab{jV hmoVo h¢ & 3

AWdm
O~ {H$gr ZXr _| ehar dm{hV _b H$m {dgO©Z {H$`m OmVm h¡, Vmo ZXr Ho$ bjUm| na n‹S>Zo
dmbo à^md H$s ì`m»`m H$s{OE & 3

(a) ‘‘India has greater ecosystem diversity than Norway.’’ Do you

agree with the statement ? Give reasons in support of your answer.
(b) Write the difference between genetic biodiversity and species
biodiversity that exists at all the levels of biological organisation.
OR
Explain the effect on the characteristics of a river when urban sewage is
discharged into it.
57/2 7 P.T.O.
 IÊS> D
SECTION D

23. dm`w-àXÿfU Ho$ H$maU Xoe Ho$ AZoH$ eham| _| dm`w H$s JwUdÎmm Ho$ {JaVo ñVa H$mo boH$a
ZmJ[aH$ ~hþV A{YH$ qM{VV h¢ Ed§ AnZo ñdmñÏ` H$mo boH$a naoemZ ^r h¢ & {OZ eham| _|
dm`w H$s JwUdÎmm AË`§V IVaZmH$ ñVa VH$ nhþ±M MwH$s h¡, CZ_| {M{H$ËgH$m| Zo ñdmñÏ`
AmnmV Kmo{fV H$a {X`m h¡ &
(a) dm`w-àXÿfU Ho$ Xmo à_wI H$maH$m| H$m C„oI H$s{OE &
(b) dm`w-àXÿfU Ho$ H$maU nmXnm| Ed§ _mZdm| na n‹S>Zo dmbo H$moB© Xmo hm{ZH$maH$ à^md
{b{IE &
(c) AnZo {dÚmb` Ho$ B©H$mo-Šb~ Ho$ H¡$ßQ>Z H$s h¡{g`V go {dÚmb` Ed§ Amgnmg Ho$
joÌm| _| dm`w-àXÿfU amoH$Zo Ho$ {bE {dÚm{W©`m| _| OmJê$H$Vm A{^`mZ Ho$ Am`moOZ Ho$
{bE {H$Ýht Xmo H$m`©H«$_m| H$m gwPmd Xr{OE & 4

Looking at the deteriorating air quality because of air pollution in many

cities of the country, the citizens are very much worried and concerned
about their health. The doctors have declared health emergency in the
cities where the air quality is very severely poor.

(a) Mention any two major causes of air pollution.

(b) Write any two harmful effects of air pollution to plants and
humans.

(c) As a captain of your school Eco-club, suggest any two programmes

you would plan to organise in the school so as to bring awareness
among the students on how to check air pollution in and around
the school.

57/2 8
 IÊS> E
SECTION E

24. (a) {d{^Þ AO¡d H$maH$m| Ho$ à{V {d{^Þ OÝVwAm| H$s {ZåZ{b{IV AZw{H«$`mE± n[ab{jV
hmoVr h¢ & àË`oH$ Ho$ EH$-EH$ CXmhaU H$s ghm`Vm go BZH$m dU©Z H$s{OE &
(i) {Z`_Z H$aZm
(ii) g§ê$nU aIZm
(iii) àdmg H$aZm
(iv) {Zb§{~V H$aZm

(b) 80 {VV{b`m| H$s EH$ g_{ï> _| `{X EH$ gßVmh _| 8 {VV{b`m| H$s _¥Ë`w hmo OmVr
h¡, Vmo Cg Ad{Y _| {VV{b`m| H$s g_{ï> H$s _¥Ë`w Xa H$s JUZm H$s{OE & 5

AWdm
(a) {H$gr nm[aV§Ì _| nmofU ñVa Š`m hmoVm h¡ ? BgHo$ g§X^© _| ‘pñWV eñ` (I‹S>r
µ\$gb)’ H$m Š`m A{^àm` h¡ ?
(b) {H$gr nm[aV§Ì _| ‘àW_ nmofH$ ñVa’ H$s ^y{_H$m H$s ì`m»`m H$s{OE &
(c) EH$ àmH¥${VH$ nm[aV§Ì _| AnaX ImÚ ûm¥§Ibm, MmaU ImÚ ûm¥§Ibm go {H$g àH$ma
gå~Õ h¡ ? 5

(a) Following are the responses of different animals to various abiotic

factors. Describe each one with the help of an example.
(i) Regulate
(ii) Conform
(iii) Migrate
(iv) Suspend

(b) If 8 individuals in a population of 80 butterflies die in a week,

calculate the death rate of population of butterflies during that
period.

OR

57/2 9 P.T.O.
 (a) What is a trophic level in an ecosystem ? What is ‘standing crop’
with reference to it ?
(b) Explain the role of the ‘first trophic level’ in an ecosystem.
(c) How is the detritus food chain connected with the grazing food
chain in a natural ecosystem ?

25. (a) nwînr nmXnm| H$s {H$Ýht Xmo `w{º$`m| H$m dU©Z H$s{OE Omo ñd`w½_Z VWm na{ZfoMZ H$mo
~m{YV H$aVr h¢ &
(b) EH$ Amd¥V~rOr Ho$ ~rOmÊS> H$s {H$gr EH$ ghm` H$mo{eH$m _| namJZ{bH$m Ho$ àdoe
Ho$ Cnam§V {Û{ZfoMZ VH$ H$s n[aKQ>ZmAm| H$m dU©Z H$s{OE & 5

AWdm
(a) _mZd {ñÌ`m| _| AmV©d MH«$ H$s ì`m»`m H$s{OE &
(b) _mZd {ñÌ`m| _| AmV©d MH«$ H$s d¡km{ZH$ g_P J^© {ZamoYH$ Cnm` Ho$ ê$n _| {H$g
àH$ma ghm`H$ hmo gH$Vr h¡ ? 5
(a) Describe any two devices in a flowering plant which prevent both
autogamy and geitonogamy.
(b) Explain the events upto double fertilisation after the pollen tube
enters one of the synergids in an ovule of an angiosperm.
OR

(a) Explain menstrual cycle in human females.

(b) How can the scientific understanding of the menstrual cycle of
human females help as a contraceptive measure ?

26. (a) Cg Ord H$m d¡km{ZH$ Zm_ {b{IE {OgH$m Cn`moJ Wm°_g h§Q> _m°J©Z Am¡a CZHo$
gm{W`m| Zo AnZo à`moJm| _| {H$`m Wm & OrZm| Ho$ g§X^© _| ghb½ZVm Am¡a nwZ`m}OZ Ho$
~rM ghg§~§Y _| CZHo$ Ûmam {H$E JE AÜ``Z H$s ì`m»`m H$s{OE &
(b) _m°J©Z Ho$ gmW H$m`© H$aVo hþE ñQ>Q>ud|Q> Zo OrZ {MÌU (OrZ _¡qnJ) H$s ì`m»`m {H$g
àH$ma H$s ? 5

AWdm

57/2 10
 (a) \«¢${gg {H«$H$ Ûmam à{Vnm{XV ‘_yb {gÕmÝV’ (goÝQ´>b S>mo½_m) {b{IE & Š`m BgHo$
Hw$N> AndmX ^r h¢ ? H$maU ~VmVo hþE EH$ CXmhaU H$s ghm`Vm go AnZo CÎma H$s
nw{ï> H$s{OE &
(b) ‘ê$nm§Var` {gÕmÝV’ H$s O¡damgm`{ZH$ àH¥${V H$m {ZYm©aU {H$g àH$ma hþAm Omo
{J«{\$W Ho$ à`moJm| Ûmam ñnï> Zht hmo nm`m Wm ? g_PmBE & 5

(a) Write the scientific name of the organism Thomas Hunt Morgan
and his colleagues worked with for their experiments. Explain the
correlation between linkage and recombination with respect to
genes as studied by them.

(b) How did Sturtevant explain gene mapping while working with
Morgan ?

OR

(a) State the ‘Central dogma’ as proposed by Francis Crick. Are there
any exceptions to it ? Support your answer with a reason and an
example.

(b) Explain how the biochemical characterisation (nature) of

‘Transforming Principle’ was determined, which was not defined
from Griffith’s experiments.

57/2 11 P.T.O.