NIOS Class 12 Question Paper 2021 (Jan Feb) Biology

This Question Paper consists of 30 questions and 12 printed pages.
Bg àíZ-nÌ _| 30 àíZ VWm 12 ‘w{ÐV n¥ð> h¢&
Sl. No.

Roll No.
AZw H « $_m§ H $
Code No.
H$mo S > Z§ . 60/OSS/1
BIOLOGY (Theory) Set / go Q > A
Ord{dkmZ ({gÕm§V)
(314)
Day and Date of Examination
(narjm H$m {XZ d {XZm§ H $)
Signature of Invigilators 1.
({ZarjH$m| Ho $ hñVmja)
2.
General Instructions :
1. Candidate must write his/her Roll Number on the first page of the Question Paper.
2. Please check the Question Paper to verify that the total pages and total number of questions contained in
the Question Paper are the same as those printed on the top of the first page. Also check to see that the
questions are in sequential order.
3. Making any identification mark in the Answer-Book or writing Roll Number anywhere other than the
specified places will lead to disqualification of the candidate.
4. Write your Question Paper Code No. 60 / OSS / 1, Set - A on the Answer-Book.
5. (a) The Question Paper is in English/Hindi medium only. However, if you wish, you can answer in any
one of the languages listed below :
English, Hindi, Urdu, Punjabi, Bengali, Tamil, Malayalam, Kannada, Telugu, Marathi, Oriya, Gujarati, Konkani,
Manipuri, Assamese, Nepali, Kashmiri, Sanskrit and Sindhi.
You are required to indicate the language you have chosen to answer in the box provided in the Answer-Book.
(b) If you choose to write the answer in the language other than Hindi and English, the responsibility
for any errors/mistakes in understanding the question will be yours only.

gm_mÝ` AZwXoe :
1. narjmWu àíZ-nÌ Ho$ nhbo n¥ð> na AnZm AZwH«$‘m§H$ Adí¶ {bI|&
2. H¥$n¶m àíZ-nÌ H$mo Om±M b| {H$ àíZ-nÌ Ho$ Hw$b n¥ð>m| VWm àíZm| H$s CVZr hr g§»¶m h¡ {OVZr àW‘ n¥ð> Ho$ g~go D$na N>nr h¡& Bg
~mV H$s Om±M ^r H$a b| {H$ àíZ H«${‘H$ ê$n ‘| h¢&
3. CÎma-nwpñVH$m ‘| nhMmZ-{M• ~ZmZo AWdm {Z{X©ï> ñWmZm| Ho$ A{V[aº$ H$ht ^r AZwH$« ‘m§H$ {bIZo na narjmWu H$mo A¶mo½¶ R>ham¶m Om¶oJm&
4. AnZr CÎma-nwpñVH$m na àíZ-nÌ H$s H$moS> g§»¶m 60 / OSS / 1, goQ> - A {bI|&
5. (H$) àíZ-nÌ Ho$db qhXr/A§J«oOr ‘mܶ‘ ‘| h¡& {’$a ^r, ¶{X Amn Mmh| Vmo ZrMo Xr JB© {H$gr EH$ ^mfm ‘| CÎma Xo gH$Vo h¢ :
A§J«oOr, qhXr, CX©ÿ, n§Om~r, ~§Jbm, V{‘b, ‘b¶mb‘, H$ÝZ‹S>, VobwJw, ‘amR>r, C{‹S>¶m, JwOamVr, H$m|H$Ur, ‘{Unwar, Ag{‘¶m,
Zonmbr, H$í‘rar, g§ñH¥$V Am¡a qgYr&
H¥$n¶m CÎma-nwpñVH$m ‘| {XE JE ~m°³g ‘| {bI| {H$ Amn {H$g ^mfm ‘| CÎma {bI aho h¢&
(I) ¶{X Amn qhXr Ed§ A§J«oOr Ho$ A{V[a³V {H$gr Aݶ ^mfm ‘| CÎma {bIVo h¢ Vmo àíZ H$mo g‘PZo ‘| hmoZo dmbr Ìw{Q>¶m|/Jb{V¶m| H$s
{Oå‘oXmar Ho$db AmnH$s hmoJr&

60/OSS/1-314-A] G-616 1  [ Contd......

BIOLOGY (Theory)
Ord{dkmZ ({gÕm§V)
(314)
Time : 3 Hours] [Maximum Marks : 80

g_` : 3 K§Q>o] [nyUmªH$ : 80

Note : i) This Question Paper consists of 30 questions.
ii) All the questions are compulsory.
iii) Marks for each question have been indicated against it.
iv) Each question from Q. Nos. 1 to 8 has four alternatives - (A), (B), (C) and (D), out
of which one is the most appropriate. Choose the correct answer among the four
alternatives and write it in your answer-book against the number of the
question. No separate time is allotted for attempting multiple choice questions.
{ZX}e : i) Bg àíZ-nÌ ‘| 30 àíZ h¢ &
ii) g^r àíZ A{Zd
A{Zdm¶© m¶© h¢ &
iii) à˶oH$ àíZ Ho$ A§H$ CgHo$ gm‘Zo Xem©¶o J¶o h¢ &
iv) dñVw{ZîR> àíZ H«$‘m§H$ 1 go 8 VH$, à˶oH$$ àíZ Ho$ Mma d¡H$pënH$ CÎma (A), (B), (C) Am¡a (D) {X¶o J¶o h¢ {OZ‘| go EH$ ghr
¶m gdm©{YH$ C{MV h¡ & Mma d¡H$pënH$ CÎmam| ‘| go ghr CÎma Mw{Z¶o VWm Cgo AnZr CÎma-nwpñVH$m ‘| àíZ H«$‘m§H$ Ho$ gm‘Zo {b{I¶o&
dñVw{ZîR> àíZm| Ho$ {b¶o AbJ go g‘¶ Zht {X¶m Om¶oJm &

1. Which of the following is an initiation codon? [1]

A) UAG

B) UAA

C) AUG

D) AAG

{ZåZ{b{IV ‘| go H$m¡Z-gm EH$ àma§^H$ H$moS>moZ h¡?

A) UAG

B) UAA

C) AUG

D) AAG

60/OSS/1-314-A] G-616 2  [ Contd......

2. Approximately how many bacteria may be obtained from one bacterium in an hour
under favourable conditions? [1]

A) 64

B) 8

C) 32

D) Infinite number

AZwHy$b n[apñW{V`m| _| EH$ K§Q>o _| EH$ OrdmUw go bJ^J {H$VZo OrdmUw àmá {H$E Om gH$Vo h¢?

A) 64

B) 8

C) 32

D) Ag§»`

3. Hypervitaminosis is caused due to excessive intake of which of the following : [1]

A) Vit. D

B) Vit. B

C) Folic acid

D) Vit. C

{ZåZ{b{IV _| go {H$g Ho$ AË`{YH$ godZ go ""hmBna {dQ>m{_ZVm'' hmoVm h¡ :

A) Vit. D

B) Vit. B

C) µFolic acid

D) Vit. C

60/OSS/1-314-A] G-616 3  [ Contd......

4. Water chestnut shows two different types of leaves on the same plant. This condition
is known as : [1]

A) Heterotropic

B) Biparous

C) Phyllotaxy

D) Heterophylly

qgKm‹S>o Ho$ EH$ hr nm¡Yo na Xmo {^Þ àH$ma H$s n{Îm`m± {XIm`r XoVr h¢ &

A) {df_ AZwdVu

B) ~mBnoag

C) nU©{dÝ`mg

D) {df_nUu

5. For which of the following disease bioengineered vaccine has not been developed.[1]

A) Rabies

B) Marasmus

C) Herpes

D) Hepatitis B

{ZåZ{b{IV H$m¡Z-go amoJ Ho$ {bE O¡dB§Or{Z`ar d°ŠgrZ A^r VH$ {dH${gV Zht hþAm h¢ -

A) ao~rµO

B) _¡a¡ñ_g

C) hnuµO

D) hon¡Q>mB{Q>g B

60/OSS/1-314-A] G-616 4  [ Contd......

6. Apomixis is : [1]

A) Development of plants in darkness.

B) Effect of low temperature on flowering.

C) Development of plants without fusion of gametes.

D) Inability to perceive stimulus for flowering.

Ag§JOZZ hmoVm h¡ -

A) A§Yoao _o§ nm¡Ym| H$m {dH$mg

B) nwînZ na H$_ Vmn_mZ H$m à^md

C) J¡_rQ>m| Ho$ g§b`Z Ho$ {~Zm hr nm¡Ym| H$m {dH$mg

D) nwînZ Ho$ {bE CÔrnZ àmá Z H$a gH$Zm

7. Which of the following is an amphibian? [1]

A) Salamander

B) Calotes

C) Crocodile

D) Hemidactylus

{ZåZ{b{IV _| go H$m¡Z-gm Eopåµ\${~`Z àmUr h¢?

A) g¡bm_¢S>a

B) H¡$bmoQ>rµO

C) _Ja

D) ho{_S>°ŠQ>mBbg

60/OSS/1-314-A] G-616 5  [ Contd......

8. Name the phenomenon which makes it difficult to close a wooden door after
monsoon. [1]

A) Osmosis

B) Plasmolysis

C) Diffusion

D) Imbibition

Cg n[aKQ>Zm H$mo Mw{ZE {OgHo$ H$maU _mZgyZ Ho$ níMmV² bH$‹S>r Ho$ XadmµOm| H$mo ~§X H$aZm H${R>Z hmo OmVm h¡?

A) namgaU

B) n«Ðì`b`Z

C) {dgaU

D) A§V…emofU

9. State any two adaptations found in plants to reduce transpiration. [2]

dmînmoËgO©Z H$mo H$_ H$aZo Ho$ {bE nm¡Ym| _| nmE OmZo dmbo {H$Ýht Xmo AZwHy$bZm| H$s MMm© H$s{OE&

10. Draw a neat and labelled diagram of the Androecium and Gynoecium in an Angiosperm
flower. [2]

{H$gr E|{O`moñn_© _| E§S´>mo{g`_ (nw_§J) Am¡a J`Zr{g`_ (Om`m§J) H$mo Xem©Zo dmbm EH$ ñdÀN> Am¡a Zm_m§{H$V
AmaoI ~ZmBE&

11. Name the two basic strategies for conservation of biodiversity and define them with
suitable examples. [2]

O¡d{d{dYVm Ho$ g§ajU Ho$ {bE Xmo _yb^yV H$m`©Zr{V`m± ~VmBE VWm CZHo$ Cn`wº$ CXmhaU ^r Xr{OE&

60/OSS/1-314-A] G-616 6  [ Contd......

12. Draw a neat diagram of the male reproductive system of a Cockroach. Label tests
and ejaculatory duct in it. [2]

{VbMÅ>o Ho$ Za OZZ V§Ì H$m EH$ ñdÀN> AmaoI ~ZmBE VWm Cg_| d¥fU VWm ñIbZ dm{hZr H$m Zm_m§H$Z H$s{OE&

13. Distinguish between actively acquired immunity and passively acquired immunity.[2]

g{H«$` ê$n go Cnm{O©V Ed§ {ZpîH«$` ê$n go Cnm{O©V à{Vajm _| A§Va ~VmBE&

14. What is a Food chain? Give a suitable example. What are different steps of a food
chain known as? [2]

ImÚ-l¥§Ibm Š`m hmoVr h¡? EH$ Cn`wº$ CXmhaU Xr{OE& ImÚ-l¥§Ibm Ho$ {d{^Þ MaUm| H$mo Š`m H$hVo h¢?

15. Explain Kranz anatomy. [2]

H«$m§O emara H$s ì`m»`m H$s{OE&

16. a) Mention any two functions of Auxin.

b) Which two hormones are essential for vascular tissue differentiation.

[2]
a) Am°pŠgZ Zm_H$ hm°_m}Z Ho$ H$moB© Xmo H$m`© ~VmBE&

b) g§dhZr D$VH$-{d^oXZ Ho$ {bE H$m¡Z-go Xmo hm°_m}Z A{V Amdí`H$ h¢?

60/OSS/1-314-A] G-616 7  [ Contd......

17. State any four reasons for the degradation of water. [2]

nmZr Ho$ jaU Ho$ {bE H$moB© ^r Mma H$maU ~VmE§ &

18. Distinguish between multiple alleles and Codominance giving suitable examples.[2]

Cn`wº$ CXmhaU XoVo hþE ~hþEobrbm| (~hþ{dH$pën`m|) Am¡a ghà^m{dVm _| A§Va ~VmBE&

19. Distinguish between a tendon and a ligament. [2]

H§$S>am Am¡a ñZm`w _| A§Va ~VmBE&

20. a) List any three advantages of Bio-diesel.

b) Name a common Petro-Plant.

[2]

a) O¡d S>rµOb (~m`moS>rµOb) Ho$ VrZ bm^mo H$s gyMr ~ZmBE&

b) EH$ gm_mÝ` noQ´>mo-ßbm§Q> H$m Zm_ ~VmBE&

21. With the help of a flow chart explain the chromosomal basis of sex-determination in
humans. [4]

EH$ àdmh MmQ>© H$s ghm`Vm go _mZdm| _| qbJ-{ZYm©aU Ho$ JwUgyÌr AmYma H$s ì`m»`m H$s{OE&

60/OSS/1-314-A] G-616 8  [ Contd......

22. Draw neat and labelled diagrams of : [4]

a) Stamens in Pea flower.

b) Moss plant with a sporophyte.

ñdÀN> Am¡a Zm_m§{H$V AmaoI ~ZmBE :

a) _Q>a Ho$ nwîn Ho$ n§wHo$ga

b) ~rOmUw-CX²{^X g{hV _m°g H$m nm¡Ym

23. a) What do you understand by a balanced diet?

b) What special diet is recommended for a pregnant woman and why?

[4]

a) g§Vw{bV Amhma go AmnH$m Š`m VmËn`© h¡?

b) EH$ J^©dVr _{hbm H$m H$m¡Z-gm {d{eï> Amhma {X`m OmVm h¡ Am¡a Š`mo?

$ 24.a) How are the heart sounds Lubb and Dubb produced during heart-beat?

b) What is the role of S.A. node (Sinu Atrial Node) in the heart? Where is it
situated?

[4]

a) öX` -ñn§XZ Ho$ Xm¡amZ öX` H$s b~ Am¡a S>~ Üd{Z`m± H¡$go CËnÞ hmoVr h¡?

b) öX` _| S.A. node ({eamZmb-AqbX nd©) H$s Š`m ^y{_H$m hmoVr h¡& `h nd© H$hm± pñWV hmoVm h¡?

60/OSS/1-314-A] G-616 9  [ Contd......

25. a) Draw a diagrammatic representation of an antibody.
b) Define the terms :
i) Immunity
ii) Genetic Engineering
[4]
a) EH$ à{Vajr H$m AmaoIr {Zê$nU ~ZmBE&
b) {ZåZ{b{IV H$s n[a^mfm {b{IE …
i) à{Vajm
ii) AmZwd§{eH$ A{^`m§{ÌH$s (B§Or{Z`ar)

26. a) What do you understand by the following terms :
i) Implantation
ii) Colostrum
iii) Artificial Insemination
b) Name the hormone :
i) Produced by the placenta.
ii) Responsible for uterine contractions for child birth
[4]
a) {ZåZ{b{IV erf©H$mo§ go AmnH$m Š`m VmËn`© h¡ …
i) A§Vam}nU
ii) ZdXþ½Y
iii) H¥${Ì_ dr`©goMZ
b) hm°_m}Z H$m Zm_ ~VmBE :
i) Anam ~ZmVm h¢

ii) ~ƒo Ho$ OÝ_ Ho$ Xm¡amZ J^m©e` g§Hw§$MZm| Ho$ {bE CÎmaXm`r &

60/OSS/1-314-A] G-616 10  [ Contd......

27. a) Mention any two special features of the meristematic cells and also mention
any two locations they are present.

b) Name the complex tissues of plants and state their main functions.

c) Give two suitable examples of each of the following :

i) Plasma Proteins

ii) Contractile proteins

[6]

a) {d^Á`moVH$ H$mo{eH$mAm| Ho$ H$moB© Xmo {d{eï> bjU {b{IE Am¡a CZ Xmo pñW{V`m| H$s MMm© H$s{OE Ohm±
do nm`r OmVr h¡&
b) nm¡Ym| Ho$ gpå_l D$VH$mo Ho$ Zm_ {b{IE Am¡a CZHo$ à_wI H$m`© ~VmBE&
c) {ZåZ{b{IV _| go àË`oH$ Ho$ Xmo-Xmo Cn`wº$ CXmhaU Xr{OE :
i) bgrH$m (ßbmµÁ_m) àmoQ>rZ|
ii) g§Hw$MZerb àmoQ>rZ|

28. a) What is Leghaemoglobin and where is it present? State the role it plays in
N2-fixation.

b) Give the overall general chemical equation of photosynthesis?

c) By the help of an appropriate example, briefly explain the 'Law of limiting
factor".

[6]

a) boJ hro_mo½bmo{~Z Š`m hmoVr h¡ Am¡a H$hm± nm`r OmVr h¡? N2 pñWarH$aU _| BgH$s ^y{_H$m H$s MMm©
H$s{OE&
b) àH$me g§íbofU Ho$ g_J« gm_mÝ` amgm`{ZH$ g_rH$aU {b{IE&
c) EH$ Cn`wº$ CXmhaU XoVo hþE ""gr_mH$mar H$maH$ Ho$ {Z`_'' H$s g§jon _| ì`m»`m H$s{OE&

60/OSS/1-314-A] G-616 11  [ Contd......

29. a) Draw a neat diagram of the double helical structure of DNA.
b) Who proposed this structure.
c) Draw a diagrammatic representation of an RNA showing anticodon and codon
pairing?
[6]
a) DNA H$s Xmohar Hw§$S>{bZr g§aMZm H$m EH$ ñdÀN> AmaoI ~ZmBE&
b) Bg g§aMZm H$s àñVmdZm {H$gZo H$s Wr?
c) RNA H$m EH$ AmaoIr {Zê$nU ~ZmBE {Og_| à{VH$moS>moZ Am¡a H$moS>moZ `w½_Z Xem©`m J`m h¡&

30. Draw a neat diagram to show the location of the eight principal endocrine glands in
the human body. [6]

_mZd eara H$m EH$ ñdÀN> AmaoI ~ZmBE {Og_| à_wI AmR> A§V:òmdr J«§{W`m± Xem©`r J`r hm|&



60/OSS/1-314-A] G-616 12 