Uttarakhand Board Class 12 Question Paper 2024 for Biology

UTTRAKHAND BOARD

Question Paper

1tm =i. SkH Swf # tiwt ' s
Roll Flo" No, of printed Paqes : S

131 401(mc!
20?'4
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BIOLOGY {THEOIaYI
S4,U:3Edl f WfnF : ?{}
'finre:3Hours] I i\,{xx" }'[arks : ?fi
fidqr : (!) F*T ITqq-wi fr gm 26 sw dr q+& xva *'Frmd S1

Directloms I Th*:re are in all 26 questions in this questlon paper' Ali questions are
comPulsorY.
{li) Hqq} AE frcrfftn 3im 3qb qTq3s 3rfuf, #l
Manks alloteel to the questions are nnentir:ned against them'
(iii) s*6 ssa.'di €ilT"+nfu qk& iTur q5frf, rcE f;frul
Read each qtrestion carefully and ans\ffer to the polnt'
(iv) ey{ $g11 I u@c qw *l Ss sqq'b }t-dffi qug h rrr{ q a-{ fi-,$-.d.r [:* ry;
t
* I e-fr frmm #rft r..rqqfr-drr fr fr.foui ssq Eqffir : s re
rraRr+
B?re?T s$T dl

euestion No.1 is rnultiple clroiee question. Four options are girren ln
answer of each part of this questiori. \,{lrite ccrrect option in yout" ilfi5'l+'cr-
borik. Question No. 2 to 5 are definite ans\r/er type ouestioirs,
(v) qs{ H"GTT 1 si q.f6 rsw'r.F sro eri *t qeq i+e"lT z * s fiE uiffi'*ffi & qvq
*t q'Eq nss;i o r5 acr dt 3iffi b sq-{dt sn'riwl 16 * 23 fl# ffiq.i-m &
*
qsq f,t syq q{-wT 24 + 26 d?F EK 3td & ssE d, &"f,e sw ewn 26 &si*d
:n$k: ffi'*l
Eaeh part of Question No. 1 carries one rnark" Question No. 2 to 5 are
of one inark each" Question No" 6 to 15 are of two marks eaeh. QuesLi*n
No. 16 to ?-3 are of three marks eaeh. Question No. 24 to 26 are cf
fsur r,,iarks eaeh, in irvhich Questiorr No.26 is Case/Scurce h+:led
question,
(vi) f,fl q*i-qd fr q'qr; q{ sri k6rq {sf * f,Qrfr ffiq-q seq} fr B{tfrRdi km-oi qwT
-ham
fo-qT rTqT.*i t-$ sst'ifr uo ft-drfl mT & s.r'&fur't
Thene is no overall choice in this questi,ur paper, lrowever, an intei"nal
choice has been provided in few questions. A.tt*mpt only cine of tl'le
given choices in such questitlns.

tll lr'.T"o.

4

1

1 (ff) cflg&frzilfu's {h ffdl * '
catised bY :
Filariasis disease is
(i) ud{tst (ii) 'f,ildqjj{dq * (in) Eu-cartrrdT t (iv) gttRqT t
Ent-amoera Wuchererta
TrichoPhYton
Ascaris '1

(s) qfrSikfi mr FiqioT df,I t '
(iii) frffis,RT i,) qmr#'iteru
t;";ffiH*il;'ffi*
Vitamins Chernical By By Nematod By
Microbes
Bv
qrqftm EK q{ M 5'5n-fi fr M
;ral t?
1

(r) .iiq-at& *-.{luJ 613q*li
Transgenicbacteriaareusedinproductionofwhat:nacC]-:.,.'scale?
(i)-"tfu=,(ii)ffi.tq(iii)qHdfiqftil{(iv,)=idr.Hq
ThyroxineTestosteroneHumaninsulin'.i-:iatoniut.fi 1

(u) .f6.i {lg's t qq..r.il Ei-e d
-

in -
Golden rice is enriched ,.t-:{>.- ,'i',\ F-$+-
(i)f,ddffuq'n,(ii)ueMftq(ili)uffi.r*_tlftF(ir,;ib{..
rv carotene
Keratin
Vitamin'A' Anthocyanin
6tdT * '
(s) w-rffi{ rtffi-{ur t tfi*er$q 3r-{qTfl

The genotype ratio in
monohybrid cross is :
(ii) L:2:1'
(i) 5i I
(iv)1:t:3
(iri)9:3:3:t 1
qrqr srflT * ;

(f,) 3r:frya WIHT ftflT frefiuT ftrqtn
systern is found in :
Hapiclcliploid sex determination (ivi dtqT q
(ii) rT€JqGdt d (iii) qgd, d
(i) ,{f|-trcn { Men Snails
Birds HoneY bees
6s lrdrq C d?
1

qTlT1if,T qrlrq{ C ffirdft defr
(u) ftfuniliT
Whenr,vasmedicalterr:rinationofpregnancygiveniegalapprcva|?
(ir'1 2020
(ii) 1s77 (iii) 2017
(i) 't971 t' 1

(s) ryqa d irqi q"f;i fr sirgfnT fu era
qf fr frtrn E\dT
(iv) 3frs
Inhumanbelngs,afteronemonthofpregnancy,theembryoforms*
(i) €ffi (ii) qra
(iii)
:qi
Limli Finqers EYe
Heart
l2l
431 0Dc)

: lrqq Ersr-r b emfr a\ {su-$1 it, * msrdt m\ srftimem (A) 4?Ir a'l{sT (R) b
FdaT
qEq r\ frF€r-d fu-qr rrrs S1 ffiimftsf, (i), (i;), {iii) f,p"IT (iv) fi"S qEffi
fr6ri
FT-6i s&:trq fifrut
statenrents labelled
Direction: in next ttivo parts of Question No.-1, there are turo
as Assertion (A) and Reason (R), Frorn the
following ootions (i), (ii),
(iii) and (iv), select their correct ans\{/er'
(i)AdeIIRatq]Tr-&*auTR.,nd--r-&'qiwfim<f,T*l
cf A,'
Both A and R are correct and R is the correet explanation
ffi
(ii) A f,erT n 11€t € qq
R, n # efr a1EqI trdl at{aT *t
of A"
Both A and R" are coryect but R is not tl'le coi-reqt e'rplanation
(iii) A sEt t q"i{ R qf,f, tl
A is correct but R is incorrect'
(iv) A d?lT n *'a\ rlTTd frl
Both A and R are incorrect'
(H) 3rfqffi?rq tal , q1ffi66 auT v.6$fr-dT *-{t;ffi fr erqTFEriF:+-< fud dt
?rKq (R) ,q-ffirn ii*{t,;itq eqH sq * mqTFqn ryfi dfr 1 dt
positive
Assertion (A): Mutualism and comrnensalism both are
:nteractions in living beings'
Reason (R) : In rnutualism, both the livinq beings
are not equally
benefitted.
qi<Hur aRI
(f,) orfyorm tnl : *E ftfrerCI ffir "jq$ur s{+Jfr <iqe{ol efl-{ dltri-{ad
fuqT cj q&dT *l
6,r1ur (R) , sfuo ffitror tr-q tftrdTkfi s-d-f,q fuffiffi t regz d

$rT, fuS'Vafr egt-iffi'
sft aret di 1

by in-situ
Assertion (A): Conservation of Bicdi'rersity can lre made
conservation and ex-situ conservation"
Reason(R):ThehistoricconventiononBiologica!diversityheldin
Rio-de-laneiro in 1992, it is also knov+n as 'Earth surnmit''
2. rro frs q rry t 3lftro; ryr ff sqft?ft enl mr orri di 1

what is the presence of more than one embryo in a seed called?
3, R-€ Jrufis-f{ dtt tr6 sdr6auT fifdur 1

Give an examPle of Point mutation'
4, t
qmfrqT l3eqf, m-S ar-ti -6116 olT EIq frfuut 1

WritethenarneofpathogenwhichCausesPneumonia.

t3l lP.T.O.
431(lDc)

x
-m-n-BP
5 & fr
what is Bt? .e] ;rifffud ftrx G.qrr&: ev.iq # .Ii,tgTIffi1T'+s $ t ;
6 {& fu 3Ir-${I.,J ffi HA'rfiv ffiI-d

Drawalabellgddiagranrofwornan.Sovary,sdiagranii.,..at!cEeetionview.iiio
need of rJescniPtion'
aafi flxttryqe fr1 e"crsr{&? *sfr1 u
r'-. 2
'7 yfu rlT,Tl\'fi Hqtzq
in frov^rering piarr:' D'av/
dir:gnan"t
and tripre fusion
Exprain d*uDre ier-tiii:ation
also.
qqT S? S'# d srrrs qarss
fiflBrea',ts w?h Tp'fiq ^'::it:r
of pregnancv- (M'T"p')? Write i: :"' -
rlJhat is nredicaI tenrninatir:n
3{eftIT/oR

BTq.q aro3 ffitryfrf,
1klt qlq ETriFq & arq'frifost
procluced by placenia
\l/rite tfie name of an'/ four horrnones
.dti (tt) frEii m dd'aul ai-{T'l] ;r5l ' F rtffi a r- fi6
e. q-fi & €-dF gs 'frd (rr) freJr qa 2
d f,Fe, ffirq ;
frtl m'fl d'}i qfu-{ duh frfus
Apr-lret,atl(TT)peaplantcrossedwithpuredwarf(tt)plant.FDse.Wi.iettvi:eS
ofplantswi|lbeproducedinF,&F,generation?Explainlllth-agramaticsketch.
frtBr r:i -&ts'ut 2
ffir
qmd *' mri frqt{q 613-&s
10. ftirT frstqq oql *f,T fla beings,
tr{ention the sex determin,3tIoii,n hurnan
What is sex detelrmination?
A.lso draw linear diagram
*6q h ftu rcr tRa ma tl w"$ ffi mi
ffitt m1 umtam sff{ {'T e
r j.. rTEfu fuflK tt a

Hr {sf,r *?
InyourView,u,,rhatmotivatesyelungesterstotakealcoholordrugs?[-lowcan
this be avoided? L:<2==Z
frFqfrfts-n q-( rfEfrrn ffi
ftfuu
-
Write short notes on the following
(ffi) flrnReerq
(€) {lHTqr;m s{eil qftHnT
Chemical safetv testing
Bioreacter 2
t2 3Tr{dftffin: sqTtr ddt *t sqdq
b mtd dr mu frfuui
LJ

genetically rnodified plants'
Write any two benefits of using

431 (IDc)
t4l

L4 qr-r srfrr'{ d tq6*'*'et TF6T frfuut 2

r,ii ihe role of Peptide 'C' in human insulin"
;'.i

15 ir; "Tq qril-{ fu ffi-{uTi mT 5d-s . hut 2

"'lantrcn the causes of Green House effect.
3TercII/OR
wsif&Tw ffi frfuu- i.xz=?
Wr-ite short note on the following-
(aT) tkelbfrm s{E'frrg (s) ,tffin 3TF*?rq
Radioactive wastes Chipko-movement
I l-r qp;q tffiT qT #s (drd'i?q) ffi'sflr *t q+s:e kq b frs g--sr6r qffi sfrT{dl 3
What is colostr-um? V;/hat is lts importance for new-born baby?
3re[il[/oR
(m) ffi mri d? q6 rrl-'ti{T Rv s+rg d v< d a'rei *a LVz

What rs menopause? At approximately what age cloes it stop?
1qs1 qftq-dqpotqorfuaeoftFwdfrru't 1.vz

Draw dlagnammai.ic representation of mature embryo sac"
't -? $*f, rrds\ 6r d-f,fr-fi qTrr frftsu I $i-fq + nilfi q-ffi b fru &T' qMt b srer 6161 6{qT
wi qq:q fuqrp ftt$ d 6RUT ild-Ett B

Write the scientific name of the fruit fly, \l/hy did lolorgan prefere to wonk with
f;-uit flies for his experiment? State any tuvo reasons.
I iJ, ffi ffiEuT ffiTr *? t-f,r ME.ry fue q-o-R Jq-q}ft r\ e6ET *p 3

What is pedigree analysis? How such an analysis can be useful?
1.9. uffi iffifrfr;o)dfu-#rsfr d qr$ Hri qr& ffq snq.u{.s" qrfrttn & qrq"frfuu ud
r* srd 6r Jdqs sifrut 3

Write the name of three R.f',J.A. polymerases found in eukaryotic cells and mention
their runctions.
24. qr$it-fl sqT *? fl{l-dFr ymmr fur srdT d? qrttf, 3:f,r{q fr qm fuu Hr+
ffi ffi
y,ffi-So 6r qrr{ rsrf&t 3
Vlhat is Bioqas? How is lt pnodueed? Name the microbes used in biogas
oroduetion.

SIETEII/OR

431(rDC) I5I lP.T"O.

fuqrrTrEsfr ''ry df&irn it"rfr fihFss
l-.\J-J
-

!Vrite shr:rt nctes on the foltowing-
tffi) *a;-Sqm
Bio fei-tilizers
(s) fi.3il.*"
tsOD (Biological OxYgen Demand)
(rl) mptr-o e-q"r
Natural Selection
?
21" gq-dlra 3r tFT u. mdffiT fu IrdD-dt6T 3d!,q dfrut
MentiontheprocessesofReconrbinantDNATechnology.
22. ffi
q'.frfufrm otr { s-et saTF 6ft sbqT 6;t eq'f,r'sut
Give an account of energy flow in an ecosystem'
SIeIqIlOR
1x3=j
1ffifurrqdMfhftsii"
Write short notes on the following-
(6) tnftfwrfnm Fr}.frs
Hcalogical PYranrid
ilg) 3srdfif,i
Prcduct ivitY
(q) -.ffq ffiq
Biomass
B -=
23 ffqfu 3dmts (Naturat habftat) fr sfl?i} b qEil dI+ ET-e rsfr1frq 3la',E'fl-Bi
frftws u?i 3Ttrn qfhw ffi dtfrrir 3

organisrns in natural hat tai
Name any three interactions take place between
and rlescribe thenr brieftY,

3rerff/oR
1x3=3
fr'6{ qr trf}lw ft.qtt fmfu-$ -
Write short i-totes on fcliltiwing-
(6) qBr:q-s;i (s) qISq qre (q) HiffiG +d rjsf,
Itlational Park BiosPhere reserves
Sacred groves

431 (lDc) t6l

ffifl'tul S{ qrHT3* & rf{F' ft-s s-*-"*'t
24 nge-flTd-;iq aur gnffmgaaa & €H 3{<K sq
tl
e-r atitq,u*fr b em d
EHi E"r& qi{nq*t& -n,a *fr*i
or o]ftr-or frqTffi dnr
4

Megasporogenesis' which type cf
Differentiate between Microsporogenesis and
lrlame the structures formed at the
end
cell dlvision occurs dtrring these events?
of these two events'
3Ter{r/ oR^

(E;) qrfl affI d;7 6l s@ qTqTbd ia-f {fifr'u t
J

Female Reproductive system'
Draw a neat and iabelled diagram of
(€) sI,f-s-{a E-d 36.n-fi 6T 3{TtdtqFrsquT otfur ?

and oogenes's.
Make a diagramatic representation of spermatogenesis
25 6**6r * u-< u dt qqaqT S 3w fr*qdBfr
at{ ad.r{ #tsEi fu1 fi
4 *fritil
Describethesalientfeaturesofthedouble*helixstructureofD,N'A.Drawdiagrarn
also.
3relql/oR
frm srotc nul ffim-r,t de qft
E-s Eqt{I qt5q 6I frara uffi q'Isi,ffiq El t m-q fary'' '*'$ '

Jq-fr1 qTfi $f,Fti it zra
qli fo*g q6I-{ ffid'&nn Mtr siil HqET"Ssi
whatdoessexrlinkedcharactermean?Ifacolourbiindnralemarriesanr:rn;a:
Woman(female),howthisdiseasedeveIopintheirpr0geny?Exp!airl
diagrammatrcallY^
qft-& aqi rsb +t frd rru qr'fr fu rd{ ftd&E
26. FmfrRra 3rq.ca qi €qrqxfu
answer the questions 6liven beinw-
Read the folt<lwing passage carefully and
qr-d qk{HT qqil eioeTs"r h ftu sgffi 6}frT ti u-.gg 6{"ss,* 'r-r'i tcr
r t "''fl
u.-fl rq.iffid
tfr or'}
#i tW
aEir I t*-fi t -6I<r
tw sq Hiv (t{13{r$.&. ) frEroJ *nr *qtmft-a i fS Wc,El-fl

t
sq"t qt{ qr6ar Hmfl.tf, ffifu ffi*+.R ?m *m?TI tr
# * 6i;t.' * :s}
jq"flq *t aqit *?r fi ql-trt
'i
ii qa qEgar tr sq-fl ffirfrrfr cffi. t, amq cKetr s-Jaq
3fi1 {rsqi d snco r*"ITl ffit u-.*v frreu e sfr ".;f,m€#
.15q
{t
ug-,fl FriTr,T €Teq (NACO)
q-iil{ h ffiItrfiq s1qrs{ fuu S, h{rh gIfi iI?J "?s'r$ &' qt*Oq8l
Sf Brq €r€rT qr{6-{ t 65-$
* mfh qTma;hEi*rr
e {ffii 6T t6r m H-6rrT t i rra ftu 6q fiFrffi ** d1 3*dqrrffir;
qql?fi HInT '* i
fr ftflr fr sigf, sn'* eg H& r kqq-{ & qzlq ftq s-,sfl fr{q
l7l IP.T.*.
431(IDC)

The word AIDS stands for Acqr"iired InnmLrno Defrc[ency Syndrors'le. AIDS was
first reported in 1981" AIES r.nainly eaused by the [-{IV (Hu;"nan imnrunodeflciene'r
Virus). It Es aiso calied retrovirus. HiV infection nrainly occur's by sexual contact
with infected person. it is L:-ansmitted fr-orn the infected mothcr to hen chiid
through the Placenta. AIES has nei cure, but pnevention is the best cane, In our
country, the Narional AIDS Controi enganisation (liJACO) and in states, the State
AIDS Control Onganisatians (SACC) are nraking people awere towards AIDS
education. World h.lealth Organlsation (Wli$i has started a nurnbei'of prografi'xrr'les
to prevent the spreadinq of l{IV infectiern. Fen thls, irye have need te aware ar"ld
alert, so that india eou!d lead for'ward in the direct;cn ef Hunian Welfar-e, On tst
day of Decennbeq AIm*s dav is celeb;'ated'
(6) rrs.-fl Lrtr qffie eqih * ffi+ q dnt S-m-el tl L

How AIDS s;reeds fronr one infected persCIn to others?
(s) "q{Ffr fr smq srqilH t"- w-s fu er<sf fr w m}Bu't 1

"Prevention is the best cure" -Clarifv ln context to AIDS"
(rr) ftq{ wreffi E+qaq sr{"r urr 3{d # rimqtrT m} *m* * tmt b frT+ silq:e+ ffi rra
arfff Grr Jdtq ft18ru1 2

Mention the programmes started by WHO to prevent the spreading of HIV
infectt*n "

*****

431(rDC) I8I

a

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