Rajasthan Board Class 12 Question Paper 2025 Biology

RAJASTHAN BOARD

QUESTION
PAPER
2025

ANNUAL EXAMINATION

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Zm_m§H$ Roll No.

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Sl.No. :

No. of Questions – 18
No. of Printed Pages – 11 SS–42–Biology

Cƒ _mÜ`{_H$ narjm, 2025
SENIOR SECONDARY EXAMINATION, 2025
Ord {dkmZ

TEAR HERE TO OPEN THE QUESTION PAPER
BIOLOGY
g_` : 3 KÊQ>o 15 {‘{ZQ>

àíZ nÌ H$mo ImobZo Ho$ {bE `hm± \$m‹S>|
nyUmªH$ : 56

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Candidate must write first his / her Roll No. on the question paper
compulsorily.
2) g^r àíZ H$aZo A{Zdm`© h¢&
All the questions are compulsory.
3) àË`oH$ àíZ H$m CÎma Xr JB© CÎma-nwpñVH$m _| hr {bI|&
Write the answer to each question in the given answer-book only.
4) {OZ àíZmo§ _| AmÝV[aH$ IÊS> h¡§, CZ g^r Ho$ CÎma EH$ gmW hr {bI|&
`hm± go H$m{Q>E

For questions having more than one part, the answers to those parts are to be
written together in continuity.

SS–42–Biology 7034 [ Turn Over

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5) àíZ nÌ Ho$ {hÝXr d A§J«oOr ê$nmÝVaU _o| {H$gr àH$ma H$s Ìw{Q> / AÝVa / {damoYm^mg hmoZo na {hÝXr ^mfm
Ho$ àíZ H$mo hr ghr _mZ|&

If there is any error / difference / contradiction in the Hindi & English versions
of the question paper, the question of Hindi version should be treated valid.

6) àíZ H$m CÎma {bIZo go nyd© àíZ H$m H«$‘m§H$ Adí¶ {bI|&
Write down the serial number of the question before attempting it.

SS–42–Biology 7034

3
IÊS> - A
SECTION - A

~hþ{dH$ënr àíZ (i go xviii) {ZåZ{b{IV àíZm| Ho$ CÎma H$m ghr {dH$ën M¶Z H$a CÎmanwpñVH$m ‘| {b{IE&
Choose the correct answer from multiple choice questions. (i to xviii) and write in given
answer book.
1) i) Am^mgr ’$b H$m CXmhaU h¡& [½]
A) Am‘ ~) go~
g) H$sdr X) Va~yO
An example of a false fruit is -
A) Mango B) Apple
C) Kiwi D) Watermelon
ii) nrV qnS> (H$mn©g ë¶w{Q>¶‘) Ûmam ^mar ‘mÌm ‘| ñÌm{dV hm°‘m}Z H$m¡Zgm h¡? [½]
A) Q>oñQ>oñQ>oam°Z ~) àmoOoñQ>oamoZ
g) àmob¡p³Q>Z X) WmBam°p³gZ
Which hormone is secreted in large amount by the "Corpus luteum"?
A) Testosterone B) Progesterone
C) Prolactin D) Thyroxine
iii) {ÛVr¶H$ ewH«$mUw H$mo{eH$m ‘o§ JwUgyÌm| H$s g§»¶m h¡ - [½]
A) 23 ~) 24
g) 46 X) 47
Number of chromosomes in secondary spermatocyte are -
A) 23 B) 24
C) 46 D) 47
iv) J^m©dñWm amoH$Zo H$m ñWm¶r ‘mܶ‘ h¡ - [½]
A) ~§Ü¶H$aU ~) Amd{YH$ g§¶‘
g) A§V-J^m©e¶r¶w{º$ X) S>m¶m’«$m°‘
Terminal method to prevent pregnancies is -
A) Sterilisation B) Periodic abstinence
C) Intra uterine devices D) Diaphragms

SS–42–Biology 7034 [ Turn Over

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v) d§emJ{V H$m H«$mo‘mogmo‘ {gÕm§V {H$Ýhmo§Zo {X¶m? [½]
A) S>r~«rO, H$m°aoÝg ~) gQ>Z, ~modoar
g) íbmBS>Z, ídmZ X) dmQ²>gZ, {H«$H$
Who gave the chromosomal theory of inheritance?
A) de Vries, Correns B) Sutton, Boveri
C) Schleiden, Schwann D) Watson, Crick
vi) g‘¶w½‘Or à^m{dVm H$mo àX{e©V H$aZo dmbm OrZmoQ>mBn h¡ - [½]
A) RRYy ~) RrYy
g) rrYy X) RRYY
Genotype which represent homozygous dominance -
A) RRYy B) RrYy
C) rrYy D) RRYY
vii) AmZwd§{eH$ {dH$ma Omo H$s X-H«$mo‘mogmo‘ H$s EH$ A{V[aº$ à{V{b{n Ho$ H$maU CËnÞ hmoVm h¡ - [½]
A) S>mCZ qgS´>mo‘ ~) Q>Z©a qgS´>mo‘
g) ³bmBZ’o$ëQ>a qgS´>mo‘ X) hr‘mo’$s{b¶m
Genetic disorder which is caused due to presence of an additional copy of
X-chromosome -
A) Down's syndrome B) Turner's syndrome
C) Klinefelter's syndrome D) Haemophilia
viii) {ÛHw§$S>br S>rEZE ‘| ES>o{ZZ jma {Og jma go OwS>Vm h¡ dh h¡ - [½]
A) WmB{‘Z ~) ½dm{ZZ
g) gmBQ>m{o gZ X) ¶yao{gb
In DNA Double helix Adenine base joins with which base -
A) Thymine B) Guanine
C) Cytosine D) Uracil
ix) OrdmUw ‘| AZwboIZ Ho$ Xm¡amZ RNA H$m àH$ma Omo Q>oånboQ> àXmZ H$aVm h¡ - [½]
A) tRNA ~) rRNA
g) mRNA X) hnRNA
The type of RNA which provides template during transcription in Bacteria -
A) tRNA B) rRNA
C) mRNA D) hnRNA

SS–42–Biology 7034

5
x) {dH$mg Ho$ S>m{d©Z {gÕm§V H$m ‘yb VËd h¡ - [½]
A) CËn[adV©Z ~) ñdV… OZZ
g) àmH¥${VH$ MwZmd X) amgm¶{ZH$ n[adV©Z
The essence of Darwinian theory about evolution is -
A) Mutation B) Spontaneous generation
C) Natural selection D) Chemical change
xi) EMAmB©dr {dfmUw H$m àH$ma h¡ - [½]
A) Eo{S>Zmodm¶ag ~) ~¡³Q>r[a¶mo’o$O dm¶ag
g) [aQ´>modm¶ag X) amoQ>mdm¶ag
The type of HIV virus is -
A) Adenovirus B) Bacteriophage virus
C) Retrovirus D) Rotavirus
xii) Q>mB’$m°BS> Áda H$s nw{ï> {H$g narjU go H$s Om gH$Vr h¡? [½]
A) {dS>mb ~) Ebrgm
g) ~m¶moßgr X) gmoZmoJ«m’$s
Typhoid fever could be confirmed by which test -
A) Widal B) ALISA
C) Biopsy D) Sonography
xiii) ~m¶moJ¡g Ho$ CËnmXZ go gå~{ÝYV gyú‘Ord h¡ - [½]
A) {dfmUw ~) àmoQ>moOmoAm
g) OrdmUw X) H$dH$
Microorganism related to the production of biogas is -
A) Virus B) Protozoa
C) Bacteria D) Fungus
xiv) E§OmB‘ {OgH$m à¶moJ ~moVb dmbo ’$bm| Ho$ ag H$mo A{YH$ ñdÀN> Ed§ gm’$ H$aZo ‘o§ {H$¶m OmVm h¡ -[½]
A) bmBnoO, E‘mBboO ~) n¡³Q>rZoO, àmo{Q>EoO
g) b¡³Q>oO, gwH«o$O X) ݶyp³bEoO, Q>m¶{bZ
An Enzyme that is used for bottled fruit juice to make more clean and clear.
A) Lipase, Amylase B) Pectinase, Protease
C) Lactase, Sucrase D) Nuclease, Ptyalin

SS–42–Biology 7034 [ Turn Over

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xv) BH$mo Ama I (EcoRI) ‘o§ "Ama' go OrdmUw H$m ³¶m àX{e©V hmoVm h¡? [½]
A) dJ© ~) g§K
g) à^oX X) JU
What does the 'R' is derived from the EcoRI?
A) Class B) Phylum
C) Strain D) Order
xvi) ~rQ>r H$nmg nm¡Yo {H$g Ordm| go gwa{jV ahVo h¡? [½]
A) gyÌH¥${‘ ~) OrdmUw
g) H$dH$ X) H$sQ>
Bt cotton plants protected from which organism?
A) Nematode B) Bacteria
C) Fungus D) Insect
xvii) g‘{ï> JwU ‘| Za Ed§ ‘mXm H$m AZwnmV H$hbmVm h¡ - [½]
A) OÝ‘Xa ~) ‘¥Ë¶wXa
g) qbJ AZwnmV X) g‘{ï> KZËd
In population attributes the ratio of males and females is called -
A) Birth rate B) Death rate
C) Sex ratio D) Population density
xviii) O§Vw d nm¡Ym| Ho$ {dbwárH$aU H$m ‘w»¶ H$maU Zht h¡ - [½]
A) gh{dbwáVm ~) {dXoer Om{V¶m| H$m AmH«$‘U
g) ~møñWmZo g§ajU X) {eH$ma H$aZm
An important cause driving animals and plants to extinction is -
A) Co-extinctions B) Alien species invasions
C) Ex-situ conservation D) Hunting

SS–42–Biology 7034

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2) [a³V ñWmZm| H$s ny{V© H$s{OE :
Fill in the blanks :
i) EH$ àê$nr {ÛdrOnÌr ^«yU ‘| EH$ ................ VWm Xmo ~rOnÌ g‘m{hV hmoVo h¢& [½]
A typical dicotyledonous embryo consists of an _______ and two cotyledons.
ii) ^«yU (J‘©) Am¡a ‘mV¥ eara Ho$ gmW J{R>V g§aMZmË‘H$ Ed§ {H«$¶mË‘H$ BH$mB© H$mo ............... H$hm
OmVm h¡& [½]
The structural and functional unit formed between embryo (foetus) and
maternal body is called ________.
iii) eara H$s ajm Ho$ {bE ~Zo ~ZmE à{Vajr grYo hr eara H$mo {XE OmVo h¡ Vmo dh ................ à{Vajm
H$hbmVr h¡& [½]
Readymade antibodies are directly given to protect the body then it is called
_______ immunity.
iv) ‘bo[a¶m naOrdr H$mo AnZm OrdZ MH«$ nyam H$aZo Ho$ {bE .............. Am¡a ‘ÀN>a, Xmo nanmo{f¶m| H$s
Oê$aV n‹S>Vr h¡& [½]
The malarial parasite requires two hosts ________ and mosquitoes to
complete its life cycle.
v) ‘moZm°ñH$g na߶yarAg ¶rñQ> go CËnÞ ñQ>¡{Q>Z H$m ì¶mnm[aH$ ñVa na à¶moJ ............. H$mo H$‘ H$aZo
dmbo H$maH$ Ho$ ê$n ‘| {H$¶m OmVm h¡& [½]
Statins produced by the yeast Monascus Purpureus have been commercialised
as _______ lowering agents.
vi) AmZwd§{eH$ nXmW© AmaEZE H$mo ................. (ݶyp³bEoO EÝOmB‘) go CnMm[aV H$aHo$ AbJ {H$¶m
OmVm h¡& [½]
Genetic material RNA can be removed by treatment with _______. (Nucleases
enzyme)
vii) nmaOrdr Jm¶ "amoOr' go ‘mZd àmoQ>rZ ................. ¶wº$ Xþ½Y {‘bVm h¡& [½]
Transgenic cow, 'Rosie' produces human protein ________ enriched milk.
viii) à{Vajr AUw ‘| ............... noßQ>mBS> l§¥IbmE± hmoVr h¡& [½]
Antibody molecule has ________ peptide chains.
ix) ................. Am¡a CƒH$mo{Q> nmXnm| H$s O‹S>mo Ho$ ~rM H$dH$‘yb gmhM¶© h¡& [½]
The mycorrhiza is association between ________ and the roots of higher
plants.
x) nanmofr Ord H$s ~mh²¶ n¥ð> na Amhmany{V© H$aZo dmbo naOrdr, .............. H$hbmVo h¡& [½]
Parasites that feed on the external surface of the host organisms are
called _______.

SS–42–Biology 7034 [ Turn Over

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3) {ZåZ{b{IV àíZm| Ho$ CÎma EH$ eãX AWdm EH$ n§{º$ ‘| Xr{OE :
Give the answers of the following questions in a word or a line.
i) hmB{S´>bm nmXn ‘| namJU H$m ‘mܶ‘ {b{IE& [1]
Write the agent of pollination in Hydrilla plant.
ii) ewH«$mUwOZZ H$mo n[a^m{fV H$s{OE& [1]
Define spermiogenesis.
iii) ‘|S>b Ho$ EH$g§H$a g§H$aU H$s F2 nrT>r ‘| ewÕbå~o, g§H$abå~o d ~m¡Zo nm¡Ymo H$m AZwnmV {b{IE& [1]
In Mendel's monohybrid cross write the ratio of pure tall, hybrid tall and
dwarf plant in F2 generation.
iv) "UUU" AmZwd§{eH$ Hy$Q> Ûmam Hy$Q>bo{IV A‘rZmo Aåb H$m Zm‘ {b{IE& [1]
Write the name of amino acid coded by genetic code "UUU".
v) AmZwd§{eH$ g§VwbZ H$mo n[a^m{fV H$s{OE& [1]
Define genetic balance.
vi) ""gmB³bmoñnmo[aZ-E'' Ho$ CËnmXZ ‘| à¶wº$ H$dH$ H$m Zm‘ {b{IE& [1]
Write the name of the fungus used in production of cyclosporin A.
vii) XþY H$s Anojm Xhr ‘| {H$g {dQ>m‘rZ H$s ‘mÌm ~‹T>Zo go nmofU g§~§Yr JwUdÎmm ~‹T> OmVr h¡? [1]
By increasing of which vitamin the nutritional quality of curd is improves as
compared to milk?
viii) {M{H$Ëgm ‘| O¡d àm¡Úmo{JH$s Ho$ Cn¶moJ H$m H$moB© EH$ CXmhaU {b{IE& [1]
Write any one example of use of biotechnology in medicine.
ix) g‘{ï> KZËd H$mo ~‹T>mZo dmbo EH$ H$maH$ H$mo {b{IE& [1]
Write one factor which increases population density.
x) ""ñdñWmZo g§ajU'' H$m EH$ CXmhaU {b{IE& [1]
Write one example of "In situ conservation".

IÊS - ~
SECTION - B

bKwCÎmamË‘H$ àíZ (CÎma gr‘m bJ^J 50 eãX) :
Short answer type questions: (Answer limit approximately 50 words) :

4) ‘mXm OZZ V§Ì H$m Zm‘m§{H$V {MÌ ~ZmBE& [1½]
Draw a labelled diagram of female reproductive system.

5) I.U.T., ghm¶H$ OZZ àm¡Úmo{JH$s H$m nyam Zm‘ {b{IE& [1½]
Write full form of I.U.T., assisted reproductive technology.

SS–42–Biology 7034

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6) H$m°b‘ -I Ho$ ‘Xm| (AmBQ>‘m|) H$mo H$m°b‘ -II Ho$ gmW g§JV H«$‘g§»¶m H$mo H$moð>H$ Ho$ ^rVa {bIH$a {‘bmBE…
[3×½=1½]
H$m°b‘ -I H$m°b‘ -II
A) S>m{d©Z q’$M i) Vwë¶ê$nVm
B) njr Ed§ {VV{b¶m| Ho$ n§I ‘o§ g‘mZVm ii) g‘OmVVm
C) ìhob, M‘JmXS> d ‘mZd Ho$ AJ«nmX H$s ApñW¶m| iii) AZwHy$br{d{H$aU
‘| g‘mZVm
Match the items in column - I with those in column - II by writing the corresponding
serial number within brackets:
Column -I Column -II
A) Darwin's finches i) Analogy
B) Similarity between birds and ii) Homology
butterfly wings.
C) Similarity between bones of forelimbs iii) Adaptive radiation
of whales, bats and humans.

7) à{VO¡{dH$ H$mo n[a^m{fV H$s{OE& ""n¡Zrgr{b¶‘ ZmoQ>oQ>‘'' go àmá à{VO¡{dH$ H$m Zm‘ {b{IE&[1+½=1½]
Define antibiotic. Write the name of antibiotic obtained from "Penicillium notatum".

8) "à{V~§YZ E§OmBåg' Ho$ H$m¶© d H$moB© EH$ CXmhaU {b{IE& [½+1=1½]
Write function and any one example of restriction enzyme.

9) ""nmobr‘aoO MoZ [aEo³eZ'' (nm°{b‘aoO l¥§Ibm A{^{H«$¶m) H$mo g‘PmBE& [1½]
Explain "Polymerase Chain Reaction".

10) nmaOrdr O§Vw H$m Cn¶moJ amoJm| H$m Aܶ¶Z hoVw {H$g àH$ma {H$¶m OmVm h¡ g‘PmBE? [1½]
Explain, how transgenic animals are used for study of diseases?

SS–42–Biology 7034 [ Turn Over

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11) g‘{ï> nmañn[aH$ {H«$¶m {Og‘| nañna {H«$¶m H$aZo dmbr XmoZm| Om{V¶m| H$mo bm^ hmoVm h¡ H$mo CXmhaU XoH$a
{b{IE& [1½]
Write by giving example, population interaction in which interaction confers benefits
on both the interacting species.

12) EH$ gmYmaU MmaU ImÚ l¥§Ibm Ho$ à˶oH$ nmofUñVa H$mo CXmhaU XoH$a {b{IE& [1½]
Write each trophic level of a simple grazing food chain with examples.

13) O¡d{d{dYVm hm°Q>-ñnm°Q> {H$Z joÌm| H$mo H$hVo h¡? [1½]
Which regions are called biodiversity hotspots?

IÊS> - g
SECTION - C

XrK©CÎmamË‘H$ àíZ (CÎma gr‘m bJ^J 100 eãX) :
Long answer type questions (Answer limit approximately 100 words) :

14) bKw~rOmUwOZZ H$mo n[a^m{fV H$s{OE& namJH$U H$s g§aMZm g‘PmBE& [1+2=3]
Define microsporogenesis. Explain structure of pollen grain.
AWdm/OR
Jwê$~rOmUwOZZ H$mo n[a^m{fV H$s{OE& n[an¹$ ^«yUH$mof H$s g§aMZm g‘PmBE& [1+2=3]
Define megasporogenesis. Explain structure of mature embryo sac.

15) AgwJw{UVm H$m H$maU {b{IE& ""S>mCZ qgS´>mo‘'' Ho$ bjU {b{IE& [1+2=3]
Write reason of aneuploidy. Write symptoms of "Down's Syndrome".
AWdm/OR
~hþJw{UVm H$m H$maU {b{IE& ""Q>Z©a qgS´>mo‘'' Ho$ bjU {b{IE& [1+2=3]
Write reason of polyploidy. Write symptoms of "Turner's Syndrome".

16) nm[apñW{VH$ V§Ì ‘| O¡d ‘mÌm Ho$ {na¡{‘S> H$m dU©Z H$s{OE& [3]
Describe the pyramid of biomass in ecosystem.
AWdm/OR
nm[apñW{VH$ V§Ì ‘| D$Om© Ho$ {na¡{‘S> H$m dU©Z H$s{OE& [3]
Describe the pyramid of energy in ecosystem.

SS–42–Biology 7034

11
IÊS> - X
SECTION - D

{Z~ÝYmË‘H$ àíZ (CÎma gr‘m bJ^J 150 eãX) :
Essay type questions (Answer limit approximately 150 words) :

17) i) B©. H$mobmB© H$mo{eH$m ‘| S>rEZE à{VH¥${V H$s H$m¶©àUmbr g‘PmBE& [3+1=4]
ii) à{VH¥$V {ÛemI H$m Zm‘m§{H$V {MÌ ~ZmBE&
i) Explain machinery of DNA replication in E. coli cell.
ii) Draw a labelled diagram of replicating fork.
AWdm/OR
i) S>rEZE H$s AZwboIZ à{H«$¶m H$mo g‘PmBE& [3+1=4]
ii) AZwboIZ EH$b H$s Amao{I¶ g§aMZm ~ZmBE&
i) Explain the process of transcription in DNA.
ii) Draw schematic structure of a transcription unit.

18) i) A‘r~Vm amoJ Ho$ Xmo bjU {b{IE& [2+2=4]
ii) A‘r~Vm amoJ Ho$ g§H«$‘U Ho$ à‘wI ñÌmoV {b{IE&
i) Write two symptoms of Amoebiasis.
ii) Write main sources of Amoebiasis infection.
AWdm/OR
i) ݶw‘mo{Z¶m amoJ Ho$ Xmo bjU {b{IE& [2+2=4]
ii) ݶw‘mo{Z¶m amoJ Ho$ g§H«$‘U Ho$ à‘wI ñÌmoV {b{IE&
i) Write two symptoms of Pneumonia.
ii) Write main sources of Pneumonia infection.



SS–42–Biology 7034

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