CG Board 12th Sample Paper Biology

छत्तीसगढ़ माध्यमिक
शिक्षा मण्डल

Model Paper

CGBSE Sample Paper
(Practice Paper)

CGBSE Model Paper
-- AGLASEM --

d{kk & 12oh
Class -12th
fo"k;& tho foKku ¼203½
Subject - Biology (203)
le;% 03 ?k.Vs iw.kkZd
a & 70
Time: 03 hours Max Marks-70

funsZ’k %
1- ç'u la[;k 1 ,d oLrqfu"B çdkj dk ç'u gksxk] ftlesa nks [kaM gksaxs :-
i) [kaM "A" esa 10 cgqfodYih; ç'u ¼MCQ½ gksxa As çR;sd ç'u 01 vad dk gksxkA
ii) [kaM "B" esa 05 cgqr NksVs mÙkj okys ç'u ¼,d 'kCn@okDl esa mÙkj½ gksx a sA çR;sd ç'u 01
vad dk gksxkA
2- ç'u la[;k 2 ls ç'u la[;k 8 rd y?kq mÙkjh; çdkj& ¼SA-I½ ç'u gksx a sA çR;sd ç'u 02 vadksa
dk gksxkA 30 'kCnksa dh lhekA
3- ç'u la[;k 9 ls ç'u la[;k 14 rd y?kq mÙkjh; çdkj& ¼SA-II½ ç'u gksx a As çR;sd ç'u 03
vadksa dk gksxkA 50 'kCnksa dh lhekA
4- ç'u la[;k 15 ls ç'u la[;k 16 rd nh?kZ mÙkjh; çdkj & ¼LA-I½ ç'u gksx a As çR;sd ç'u 04
vadksa dk gksxkA 75&100 'kCnksa dh lhekA
5- ç'u la[;k 17 ls ç'u la[;k 19 rd nh?kZ mÙkjh; çdkj & ¼LA-II½ ç'u gksx a sA çR;sd ç'u 05
vadksa dk gksxkA 100&150 'kCnksa dh lhekA
6- uksV & –f"Vckf/kr Nk=ksa ds fy, vkjs[k@fp= ds LFkku ij lS)kafrd ç'u fn, tk,axAs

Instructions:
1. Question No. 1 is an objective type question which will have two sections :-
(i) Section "A" will have 10 Multiple Choice (MCQ) questions. Each carries 01 mark.
(ii) Section "B" will have 05 very short answer questions (answer in one word) .Each carries 01 mark.
2. Question No. 2 to Question No. 8 will be short answer type-I (SA-I) questions. Each carries 02 marks.
30 words limit.
3. Question No. 9 to Question No. 14 will be short answer type-II (SA-II) questions. Each carries 03
marks. 50 words limit.
4. Question No. 15 to Question No. 16 will be long answer type (LA-I) questions. Each carries 04 marks.
75-100 words limit.
5. Question No. 17 to Question No. 19 will be long answer type (LA-II) questions. Each carries 05 marks.
100-150 words limit.
Tip - For visually impaired students, theoretical questions will be given in place of drawing/chart.

[k.M ^^v**
Section "A"
Hkkx&1 cgqfodYih; iz’u
Part- 1 Multiple Choice Questions

iz’u 01 ¼v½ % lgh fodYi pqudj fyf[k, %& (1x10=10)
Choose and write the correct option:

1. fp= esa A, B vkSj C esa dks igpkfu,A
(a) Aeknk ;qXed , B uj ;qXed ,C Hkzw.kiks"k
(b) A Hkzw.kiks"k, B eknk ;qXed ,C uj ;qXed
(c) Auj ;qXed , B /kzqoh; dsUnz , C Hkzw.kiks"k
(d) Aeknk ;qXed , B Hkzw.kiks"k ,C uj ;qXed

Identify A, B, and C in the diagram.
(a) A female gamete, B male gamete, C endosperm
(b) A endosperm, B female gamete, C male gamete
(c) A male gamete, B polar center, C endosperm
(d) A female gamete, B endosperm, C male gamete

2. ा फयन पुटक कहाँ पाया जाता है?
(a) मानव वृषण म (b) मानव अ डाशय म
(c) मानव यकृ त म (d) मढक के अ डाशय म
Where is Graphian follicle found?
(a) In the human testis (b) In the human ovary
(c) In the human liver (d) in the frog ovary

3. जैल इले ोफोरे िसस म ितब धन ए जाइम ारा कटे DNA कसके िनकट ि थत होते ह?
(a) एनोड के (b) कै थोड के (c) जैल के के के (d) जैल म कह भी
In gel electrophoresis DNA cut by restriction enzyme is located near?
(a) Anode (b) cathode (c) nucleus of gel (d) anywhere in the gel
4. ए स(AIDS) फै लाने म सहायक हो सकता है –
(a) खुले म शौच (b) हाथ िमलाना (c) िधराधान (d) cklh [kkuk [kkus ls
May help in spreading AIDS?
(a) Open defecation (b) Handshake (c) blood transfusion (d) by eating stale food
5. अपूण भािवता म ल ण ा प का अनुपात है –
(a) 9:3:3:1 (b) 3:1 (c) 1:2:1 (d) 9:4:3
In complete dominance the ratio of phenotype is?
(a) 9:3:3:1 (b) 3:1 (c) 1:2:1 (d) 9:4:3

6. ए कोहॉल से िसरका बनाने म क वन कसके ारा होता है?
(a) बैिसलस सब टिलस (b) एसीटोबै टर एसीटी (c) लॉि िडयम (d) एजोटोबै टर
In the preparation of vinegar from alcohol, fermentation takes place by?
(a) bacillus subtilis (b) Acetobacter (c) Clostridium (d) Azotobacter

7. RNA पॉलीमरे ज ारा अनुलेिखत RNA है –
(a) 28 S rRNA (b) 18 S rRNA (c) 5.8 S rRNA (d) mijksDr lHkh
RNA is transcribed by RNA polymerase.
(a) 28 S rRNA (b) 18 S rRNA (c) 5.8 S rRNA (d) All of the above

8. थम पारजीनी गाय म कौन-सा जीन िनदिशत कया गया था?
(a) मानव – लै टे बुिमन (b) a-1 ए टी ि सन (c) B-1 ए टी ि सन B-1 (d) cry IA c
Which gene was directed in the first transgenic cow?
(a) Human - lactolbumin (b) a-1 antitrypsin (c) B-1 antitrypsin (d) cry IA c

9. य द 20 जूल ऊजा उ पादक तर पर ा क जाती है, तो कतनी ऊजा भोजन के तौर पर िन िलिखत ख
ृं ला
के अ तगत मोर म उपल ध होगी? पौधा → चूहा → साँप → मोर
(a) 0.02 जूल (b) 0.2 जूल (c) 0.002 जूल (d) 0.0002 जूल
If 20 joules energy is obtained at the producer level, how much energy will be available at the peacock as
food under the following level?
(a) 0.02 joules (b) 0.2 joules (c) 0.002 joules (d) 0.0002 joules

10. रा य तथा बाघ आर ण अ यार य के िलए सही जोड़ी ह
(a) बांदीपुर-तिमलनाडु (b) मानस-असम
(c) कॉबट म य देश (d) पालामू ओिडशा ख ड ब िन
The state and the tiger reserve are the perfect match.
(a) Bandipur-Tamil Nadu (b) Manas-Assam
(c) Corbett-Madhya Pradesh (d) Palamau-Odisha division

[k.M ^^c**
Section "B"

iz'u 01 ¼c½ % ,d 'kCn@,d okD; esa mÙkj fyf[k,A 1x5₌5
Write answer in one word/one sentence
1. ,e Vh ih dk iwjk uke fyf[k,A
Write the full form of MRI.
2. oa”kkoyh fo”ys’k.k esa uj ds fy;s Á;qDr Árhd fyf[k,
Write the symbol used for male in pedigree analysis.
3. VsEiysV jTtq vkSj dksfMax jTtq esa ,d varj fyf[k, A
Write one difference between template strand and coding strand.
4. fueksfu;k jksx ds fy;s mRrjnk;h thok.kq dk uke fyf[k,
Write the name of bacteria responsible for pneumonia.
5. vkuqokaf”kdr% fufeZr tho dk ,d mnkgj.k fyf[k,A
Write an example of a genetically engineered organism.

iz’u 2 ÁFke LrU; ;k [kht dks uotkr f”k”kq dks nsuk D;ksa vko”;d gS \
Why is it to give first breast or necessary for a newborn child? 2

iz’u 3 pkjxkWQ dk fu;e fyf[k,A 2
Write Chargaff’s law.

iz’u 4 cksjkoL=koj.k ¼ cSfxax½ D;ksa djrs gS \ nks dkj.k fyf[k,aA 2
Explain why is bagging done write two reasons.

iz’u 5 gkseks gSfcfyl dh nks fo”ks"krk,a fyf[k,A 1x2=2
Write two characteristics of Homo habilis

iz’u 6 izfrtSfod ¼,saVhckW;ksfVd½ dks ifjHkkf’kr dhft,A 2
Define antibiotic.

iz’u 7 fuEu jlk;uks dk mRiknu fdl lq{etho ls gksrk gS bu jlk;uksa ds dk;Z Hkh fyf[k, &
flfVªd vEy] ysfDVd vEy] 1+1
Which microorganisum produce the following chemicals .aslo write their functions.citric acid lactic
acid

8 tyh; vkgkj J`a[kyk dk vkjs[k cukb;s A 2
Draw a diagram of the aquatic food chain.

uksV %& n`f’V Ckkf/kr Nk= vkjs[k ds LFkku tyh; vkgkj J`a[kyk dk o.kZu djsaxs A
visually impaired students will describe the food chain in place of the diagram

iz’u 9 vijk ¼IySlsaVk½ D;k gS \ vijk ds }kjk L=kfor nks gkWeksZUl ds uke fyf[k, A 1+2
What is placenta? Write the names of two hormones secreted by placenta.

iz’u 10 ,d ladjh; ladj.k fdls dgrs gS bls psdjcksMZ }kjk le>kb;s A 1+2
What is monohybrid hybridization? Explain it with a checkerboard.

uksV %& n`f’V Ckkf/kr Nk= psdjcksMZ ds LFkku Áfdz;k dk o.kZu djsaxs A
Visually impaired students will describe the process in place of checkerboard.

iz’u 11 vo”ks"kh vax fdls dgrs gS \ ekuo ds nks vo”ks"kh vaxksa ds uke fyf[k, A 1x3=3
What are vestigial organs? Write the names of two vestigial organs of humans.

iz’u 12 सहोपका रता व सहभोिजता म तीन अ तर िलिखए । 1x3=3
Write the differences between mutualism and commensalism.
iz’u 13 tula[;k o`f) ds rhu dkj.k fyf[k, A 1x3₌3
Write three reasons for population growth.

iz’u 14 ifo= miou D;k gSa \ mudh laj{k.k esa D;k Hkwfedk gS\ 1 +2=3
What are sacred grove? What is their role in conservation?

iz’u 15 ikjthoh tarq D;k gS \ ekuo }kjk ikjthoh tarq fuekZ.k ds rhu dkj.kksa dks le>kb;sA 1 +3
What is transgenic? Describe the three reasons for the creation of transgenic animals by humans.
अथवा OR

Tkh,e ikS/ks D;k gS \ ekuo }kjk Tkh,e ikS/ks fuekZ.k ds rhu dkj.kksa dks le>kb;sA 1+3
What are GM plants? Describe the three reasons for the creation of GM plants by human.

iz’u 16 Mh,u, dh lajpuk dk okVlu fØd ekWMy lfp= dk o.kZu dhft, A
Describe the Watson - Crick Model of DNA structure with a diagram. 2 +2
अथवा OR
Mh,u, ds vuqy[s ku bZdkbZ dk lfp= o.kZu dhft,A 2 +2
Describe the transcription unit of DNA with a diagram.

iz’u 17 vkids iM+ksl esa ,d O;fDr dks eysfj;k gks x;k vki vius ifjokj dks eysfj;k ls cpko ds fy, D;k
lykg nsaxs dksbZ ikWp lykg fyf[k, A
A person in your neighborhood has malaria. What advice would you give to your family to prevent malaria?
Write down five advice 1x5=5

vFkok

fd”kksjkoLFkk ds nkSjku Mªx o ,Ydksgy lsou dh vknr iMus dh laHkkouk vf/kd gksrh gS] fd”kksjksa dks Mªx o
,Ydksgy ds dqÁ;ksx ds jksdFkke o fu;a=.k ds ikWp mik; fyf[k, A 1x5=5
Drug and alcohol abuse is more likely to develop during adolescence. Write five ways adolescents can prevent
and control drug and alcohol abuse.

iz’u 18 ijkx.k fdls dgrs gS\ ijkx ds lzksr ds vk/kkj ij ijkx.k ds rhuksa izdkjksa dk o.kZu dhft,A 2 +3
What is pollination? Describe the three types of pollination based on the source of the pollen.
vFkok
Hkzq.kiks’k fdls dgrs gS\ fodkl ds vk/kkj ij Hkzq.kiks’k ds rhuksa izdkjksa dk o.kZu dhft, A 2 +3
What is endosperm? Describe the three types of endosperm based on their development.

iz’u 19 - ikWyhejkbts”ku fj,sD'ku D;k gS\ blds pj.kksa dks lfp= le>kb;sA
What is polymerization reaction? Explain their steps with diagram. 1+2 +2

vFkok OR
Mh-,u-,- iquZ;kstu rduhd D;k gS \ blds pj.kksa dks lfp= le>kb,A
What is recombination technique? Explain its steps with diagram. 1+2 +2

uksV %& n`f’V Ckkf/kr Nk= fp= ds LFkku dsoy pj.kksa dk o.kZu djsaxs A
Students with visual impairment will describe only the stages.

AglaSem Earn While You Learn Program!

Share your recent question papers with us and get paid!
अपने हाल के न प हम भेज और कमाएँ!

To participate, email us with the following details:
भाग लेने के लए हम न न ववरण के साथ ईमेल कर:

- Your Name
- Your Class
- Your Board
- Details of the Question Papers you have
आपके पास उपल ध न प का ववरण

Our team will reach out to you with the next steps.
हमार ट म आगे क या के लए आपसे संपक करे गी।

Email: support@

Study Materials
Notes

Model Papers Class 6 Notes

Sample Papers Class 7 Notes
Half Yearly Sample Papers Class 8 Notes

Class 9 Notes
Important Resources
Class 10 Notes
Periodic Table
Class 11 Notes
Writing Skills / Formats

Maps of India / World Class 12 Notes

Books and Solutions

NCERT Books
NCERT Book Solutions
HC Verma Chapter Wise Solutions
RD Sharma Solutions
CGBSE Solutions