Uttarakhand Board Class 12 Question Paper 2023 for Biology

Uttarakhand Board
Question Paper
CLASS 12

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Roll No. I

No. of printed pages r 7

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2423
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BroLoGY (THEORYI
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Marks : 70
Tirne : 3l{ours l [Max.
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Eirectioms: There are in all 28 questions in this question paper. All questions
are compulsory.
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Marks alloted to the questions are mentioned against them.
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Read each question carefully and answer to the point.
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frfrrdf, y+ftq qT{ frl
Question No. 1 is multiple choice question. Four options are given
in answer of each part of this question. Write cornect option in your
answer book. Question No.2 to 7 are definite answer type
questions.
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qr{ dt H.q'iqqT a * tz n-m * 3i6 b p{ f; I !R-{'d@T 18 fr 25 cr6 ft{
Bi6 fu rq{ dt wq d{ffiT 26 * 2s ffiF aR si6 & qsq f;t
Each part of Question [\o. 1 carries one mark. Question No. 2 to 7
are of one mark each. Question tr'lo. B ta L7 are of two nnarks
each" Question l.lo. 18 to 25 are of three marks each. Question
No. 26 to 28 are of four marks each.
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rcrq fr-qT TrqT At US sqdl d fudrT u6 fr-6eq o'r €t Tfl{ frfrEt
There is no overall choice in this question papeL howevero an internal
choice has been provided in few questions. Attempt only one of
the given choices in such questions"

tll I P"T.O.

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1 (6) EFrqilqdBqrdret- 1

Double fertilization occurs in -
(i) ffitt (ii) qrdm'I$imd
Algae BrYoPhYtes

(iii) $qTilffr#d (iv) 3lrgeffisc
GymnosPerms AngiosPerms
(q) ed{@qbtffifrWrq*frtwrdrftA- 1

The number of chromosomes in the individual suffering from Turner's
syndrome is -
(i) 48 (ii) 46 (iii) 47 (iv) 4s
(1T) BqFT qafr C aflgFm slqE tDT drd ffi qrq ffir t? 1

According to Binomial system, what is the biological name of modern
human-
(i) adefir+, (ii) {q{r er€Fts
Homo-saPiens Panthera tigris
(iii) 6tqtFtffiv (iv) aiddfrfrs
Homo-erectus Homo'habilis
(q) sfrr$F{6 51ftffi1drdr t- 1

Antibiotics are Produced bY -
(i) ffiani (ii) t'r&5il<T6Kr
Vitamins Protozoans
(iii) qerakii6r<r (iv) {flEFitBRI
Microbes Chemicals
(s) FFE ii t ot{ qffiFrd E+ffi td - 1

Which is/are transgenic animal in the following -
(i) s{{il'qr (ii) nEI
Rabbit Cow

(iii) ts (iv) 3w\ffi HIft
Sheep All of the above

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(q) rilrdq rr$H iir-g{trr +ft t" 1

Golden rice is enriched in -
(i) ffi1q'g' (ii) rrm'r-ffiq
Vitamin'A' o-Carotene
(iii) ueisrqfr{ (iv) frtftH
Anthocyanine Keratine
(E) qiRfuifro ria iiTgq onr drqq rr{ +dr *- 1

The trophic level of human in an ecosystem is -
(i) qerq q'tsrur F( (ii) keq qlrvur rr<
First trophic level Second trophic level
(iii) Efiqdqurw{ (iv) ugeffrwrw<
Third trophic level Fourth trophic level
(H) q!5etfu wffit C qffi Fqt<fu +ft d- 1

In desert plants, leaves modified into -
(i) rri fr (ii) mydiii
Stem Spines
(iii) $rfi ii (iv) s$ tt
Fruits Roots
2 fig ftulqlqrfr frt sdt 3n<'k6 qra 6t dqT 6Et d? 1

what is the name of inner most layer of microsporangium?
frftn +d tHfuqr fum ror< b
=*n* 6l sfff,{ur d?
3
1

Sickle cell anaemia is the example of which type of mutation?
4 srtrr 61ffis 6d qr$ arfr *l 1

Where Darwin's Finches are found?
5 ts-q 6r wr ffT @T *? 1

What is the full form of AIDS?
6 Bt-frq fus ut{rg t qrw *or *l .l
I

By which bacterium Bt-toxin is produced.
7 fi.uw.S. rle oi gyf sv nrr d'? 1

What is the full form of C.F.C. gas?

431(rcw) I3t lP.T.O.

8. Hft*fil6r-flCs+q{rgr<rrsiFofufra}rrmo6lqlqftfut 2
Write the name of any two hormones produced by placenta in embryo
development.
9. erdfu=TaeTr3qarfifrsr<-<rsTsdotfu1 2

Clarify the difference between Transcription and Translation.
r0 . qrq b E6; sId 6..d arf, guT ilfr qt€) q;i riaF-{TI gA TIA E Hba gq Erd qtt} t 6-grqr rMr I

F1 d F,fitfr ti frrfl 16r{ b qte} srw Ett, Hfur EUh frffi? 2

A pure tall with red flower pea plant is crossed with a pure dwarf with white
flower pea plant. What type of plants will be produced in F, and F, geReration,
explain with diagrammatic sketch?
3terff / oR
fri{ frgt{q ffir *dT fa qmq t ftirr Fr€fwr ffi'r gfu frBs, ffi"{'iit d'fot
What is sex determination? Mention the sex determination in hurnan beings,
also draw liner diagram.
11. ffitftE-ffitcm (ymr$) sil< qu (qrftF rqtl b Wffiim # *-oera'a"rr frrizur b A-d
sqrq ft{fuu 1 2

Mention two measures each, for prevention and control of alcohoi and cirugs
abuse among adolescents?
Lz" fnqftrfuf, T{ df-&TH ftsuft ftftqs - 1 +t=2
Write the short notes on the following "
{ffi} rfirf, m-rFf, (q) Bt-6Er*l
Greerl revolution Bt-cotton
13. *{ frfu?vl ffir t? ffi*ffi-{ Eufr+n # EFft 6r rer6w tfr 6u eq-ilEAe 2
What is gene therapy? Explain with e>rample of Adinosine deai"nirrase deficiency?
1.4. qrs q1kie tf eq]q ffiE m) eq,sl$frt 2

Explain food web in grassland ecosystem.
sejt-dffi / oR
Erg q--{Yur b ngis sRur earr&t
Write rnajor causes of air poilution.

431(rGW) 141

4

1s. dd frB€rdT @T t? dq ftrFd€rar dqeaur mt m6 fr frfE*) qrq
6-r
what is Biodiversity? Give the name of any two methods
ftrfuir 2
of Biodiversity
Conservation"
16. fr**ld q< *Fro J*krr b qqTdiair sdq dHur
2
Write the effects of global warming on Glaciers.
L7 . ffi d q{'dfeiq frqEft frfuu- 1.+!=2
Write short notes on any two of the following :
(6) qlRno$qfrre
plastic waste
(tgt afto-<q
Forestation
(rT') *q $Tffit{
Bio-magnification
18. pfr b eld fi *d *slFro1 b +{ $$drii ol yds fiHur 3
write any three applications of biotechnology in the
area of Agricrlture.

SreErr / oR
o,rr}e ffig @r frl us66 s$Ti 6r rTrcr d $fff,{pr fitser
what are transEenic animals? Give importance and
example of transgenic animals.
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fr$quTfr#tsur e 6u fuiTeq6
\rv orfr
3
How many types of ecological pyramids in an
ecosystem? Illustrate them
diagrammatically too.

3{srdr / on
sirmi b varq d rirsTur t qftffiil dplT ${ffq b driTfiq
6.r rmils fiBer
Discuss the role of women and communities
in protection and conservation of
forests.
2a. d b 3Tusrsrq of ergqei 6rd 6'r w@ Ei qrrTifud frn
oag&r 3
Draw a neat and labelled diagram of transverse
section of ovary of woman.

3[e[fl / oR

431(rcw)
tsl I P.r.O"

{s} 3TT-+q ffi ftrfr mr& frl w dfr'sr tVz
What is menstrual cycle? Clarify.
{Es} Tflqd q-ffiTyl d *r.nr or qrqibd 6l sqr{At 11h

Draw a labelled diagram of human sperrn.
21. g-ffiqlsrqq t,ti 3{rctr{q sT aut{ dfrur 3

Describe the sperrnatogenesis and Oogenesis.
zz, ftirr ssir-{ nuT ffi oafr dt qfr t'o frdftftffi trrr drs6 S or kdl6 rgrrn;tr Tsq +
ffir fuT qzn a\ Jrb tTr& Tramtttrra fu frs eox Tdr=r dma ffidr arr vrsrst
3

What does sex-linked character mean? If a haemophilic carrier woman marries
with a norrnal male, how this disease will develop in their future progeny? Explain
diagrammatically.
v3. Frff-Mfu'er<r6Tsdqfrtffiut 3
Mention Hardy-Weinberg Principle.
z+" ffifo6q).rimr{il{qHe}artl 1*1*1=3
How does the transmission of following diseases take place?
{ffi) Etr-fl (q) qdftirr (r) Frmfur
AIDS Malaria pneumonia
zs. fr&H ffi 8? fi}fr FETwT b mqfro E kfrrro ffirR 6'r duh ffisr g

What is sewage? Describe the Primany and secondary sewage treatment.
26. q{rffrr fufr m.6} dl qa ffi
etrr{ drr d.n ta q$flry BqT il frfiffi 6xffii 61 3rils
ffirut 4

Vfhat is pollination? What are the kinds of pollination? Describe the different
agents of pollination process.

3rerin / oR
frHrfrEfrmrbroqrqifuafu-*cqr$u - 2+2=4
Draw only labelled diagram of the following -
{ffi) wm qfr6T 61Ek 6\ aeift 6u *bw< 61 3rgcrftr srd
l-ongitudinal Section (L.S.) of Pistil showing path of Pollen tube growth

431(rc\l) t6t

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(q) qRqdu qpldq 6'r fu{rirm FrsquT
Diagrammatic representation of the mature embryosac
27 . 3{R.trr.u. at *iqil{r drr duf:q dBu aprT 3{R.ttrT.U. 6T q(d var5ar 4
Describe the structure of R.N.A. and give the irnportance of
R.N.A.

SrerEI / oR
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2
Write the salient features of Genetic Code.
tst srffirila b qrpfro sprcird o}v+rgrgdr 2
Elaborate the natural selection theory of Darwinism.
28 ' qdRsr r{,SA ffi o,Fe fra qFrq d $dd #{q-qF 6t 3r{€rrs{i 6'r dufq ffiur 4
What is malaria-parasite. Describe its different stages of life
cycle in human.

3[erilT / on
ffifudERHflnqTfuTuftftfus
Write short notes on the following _
(6) S.w
2
Cancer
(s) f6y$fu9
1

Metastasis
(r) qlsTr 1

Morphine

*****

431(rGW)
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