HBSE Class 12 Question Paper 2021 Biology

CLASS : 12th (Sr. Secondary) Code No. 230
Series : SS - April./2021
Roll No.

tho foKku
BIOLOGY
Hkkx – I
PART – I
¼vkRefu"B iz'u½
(Subjective Questions)
(Academic)
[ fgUnh ,oa vaxzsth ek/;e ]
[ Hindi and English Medium ]
(Only for Fresh/School Candidates)

le; : 2 21 ?k.Vs ] [ iw.kk±d : 70 ¼Hkkx–I : 35, Hkkx–II : 35½
Time allowed : 2 21 hours ] [ Maximum Marks : 70 (Part–I : 35, Part–II : 35)

iz'u&i= nks Hkkxkas eas foHkkftr gS % Hkkx–I ¼vkRefu"B½ ,oa Hkkx–II ¼oLrqfu"B½A ijh{kkFkhZ dks nksuksa Hkkxkas ds iz'ukas
ds mÙkj dks viuh mÙkj iqfLrdk eas fy[kuk gSA iz'u&i= dk Hkkx–I ijh{kk vkjEHk gksus ij igys mÙkj&iqfLrdk
ds lkFk fn;k tk,xk rFkk Hkkx–II ds fy, vkf[kjh dk ,d ?kaVs dk le; fn;k tk,xk vFkkZr~ ijh{kk lekIr lekIr
gksus ls ,d ?kaVk iwoZ ijh{kkFkhZ dks Hkkx–II dk iz'u i= fn;k tk,xkA
Hkkx–I ds iz'u&i= esa dqy 12 iz'u ,oa Hkkx–II ds iz'u&i= eas dqy 35 iz'u gSaA
Question paper is divided into two Parts : Part–I (Subjective type) and Part–II
(Objective type). Answer the questions of both parts in your answer-book. Part–I
of question paper with answer-book will be provided with starting of
Examination and last one hour of Examination will be given for Part–II i.e.
question paper of Part–II will be provided before one hour of the end of
Examination.
Total questions in question paper of Part–I are 12 and of Part–II are 35.

• Ñi;k tk¡p dj ysa fd Hkkx–I ds bl iz'u-i= esa eqfnzr i`"B 4 rFkk iz'u 12 gSaA
Please make sure that the printed pages in this question paper of Part–I are 4 in
number and it contains 12 questions.

230/ I P. T. O.

(2) 230
• iz'u-i= esa nkfgus gkFk dh vksj fn;s x;s dksM uEcj dks Nk= mÙkj-iqfLrdk ds eq[;-i`"B ij fy[ksaA
The Code No. on the right side of the question paper should be written by the
candidate on the front page of the answer-book.
• Ñi;k iz'u dk mÙkj fy[kuk 'kq: djus ls igys] iz'u dk Øekad vo'; fy[ksaA
Before beginning to answer a question, its Serial Number must be written.
• mÙkj-iqfLrdk ds chp esa [kkyh iUuk / iUus u NksMsa+A
Don’t leave blank page/pages in your answer-book.
• mÙkj-iqfLrdk ds vfrfjDr dksbZ vU; 'khV ugha feysxhA vr% vko';drkuqlkj gh fy[ksa vkSj fy[kk mÙkj u
dkVsaA
Except answer-book, no extra sheet will be given. Write to the point and do not
strike the written answer.
• ijh{kkFkhZ viuk jksy ua0 iz'u&i= ij vo'; fy[ksaA
Candidates must write their Roll Number on the question paper.
• d`i;k iz'uksa dk mÙkj nsus lss iwoZ ;g lqfuf'pr dj ysa fd iz'u-i= iw.kZ o lgh gS] ijh{kk ds mijkUr bl
tk;s;sxkA
lEcU/k esa dksbZ Hkh nkok Lohdkj ugha fd;k tk
Before answering the question, ensure that you have been supplied the correct and
complete question paper, no claim in this regard, will be entertained after
examination.

lkekU; funsZ'k %
General Instructions :

(i) lHkh iz'u vfuok;Z gSaA
All questions are compulsory.

(ii) izR;sd iz'u ds vad mlds lkeus n'kkZ;s x, gSaA
Marks of each question are indicated against it.

(iii) vkids mÙkj vadkuqlkj gksus pkfg,A
Your answer should be according to marks.

230/ I

(3) 230
[k.M – v
SECTION – A

1. ;kSu lapkfjr jksx ds ckjs esa fyf[k,A 2
Explain STDs.

2. thu vkSj vyhy D;k gksrs gSa \ 2
What is gene and allele ?

3. LVªSIVksdkbust ,Utkbe dk D;k dk;Z gS vkSj ;s fdl thok.kq ls feyrk gS \ 2
What is the role of streptokinase & from which bacteria it is isolated.

4. vuqizokg lalk/ku D;k gS \ 2
What do you mean by downstream processing.

5. Bt ¼chVh½ VkWfDlu ml thok.kq dks D;ksa ugha ekjrk ftlls og curk gS] ij vUr%xzg.k djus okys dhV
dks ekj nsrk gS \ 2
Why does the Bt toxin not kill the bacterium that produces it but kills the
insect that ingest it ?

[k.M – c
SECTION – B

6. ,d rkykc ds vtSfod vkSj tSfod ?kVdksa dk o.kZu dhft,A 3
Describe abiotic and biotic components of a pond.

7. if{k;ksa esa fyax fu/kkZj.k dh fof/k dk o.kZu dhft,A 3
Describe the mechanism of sex determination in birds.

230/ I P. T. O.

(4) 230

8. Mh ,u , fQaxjfizafVx rduhd ds dkSu-ls pj.k gksrs gSa \ 3
What steps are included in DNA fingerprinting technique ?

9. ,ythZ D;k gksrh gS \ ;g dSls gksrh gS \ blds D;k y{k.k gksrs gS \ 3
What is allergy ? How does it take place ? What are its symptoms ?

10. ,d ?kkl ds Hkzw.k dk vuqizLFk dkV dk fp= cukb,A 3
Make well labelled L.S. of an embryo of Grass.

[k.M – l
SECTION – C

11. vkrZo pØ dk o.kZu dhft,A bl pØ dks fu;eu djus okys gkWeksZuksa ds ckjs esa fyf[k,A 5
Describe the menstrual cycle. Write about the hormones that regulate this
cycle.
vFkok
OR
'kqØtud ufydkvksa dk vkjs[kh; dkV dk ukekafdr fp= cukb, ,oa bldh lajpuk dk o.kZu dhft,A
Draw a well labelled sectional view of semniferous tubule and explain its
structure.

12. tkrh; fofo/krk dk ikfjra= esa D;k egÙo gS \ 5
What is importance of species diversely to ecosystem.
vFkok
OR
tSo fofo/krk dks ge dSls lajf{kr djsaxs \
How do we conserve biodiversity ?

230/ I
S

CLASS : 12th (Sr. Secondary) Code No. 230
Series : SS - April./2021
Roll No.

tho foKku
BIOLOGY
Hkkx – II
PART – II
¼oLrqfu"B iz'u½
(Objective Questions)
(Academic)
[ fgUnh ,oa vaxzsth ek/;e ]
[ Hindi and English Medium ]
(Only for Fresh/School Candidates)

• Ñi;k tk¡p dj ysa fd Hkkx–II ds bl iz'u-i= esa eqfnzr i`"B 8 rFkk iz'u 35 gSaA
Please make sure that the printed pages in this question paper of Part-II are 8 in
number and it contains 35 questions.
• ijh{kkFkhZ viuk jksy ua0 iz'u&i= ij vo'; fy[ksaA
Candidates must write their Roll Number on the question paper.
• d`i;k iz'uksa dk mÙkj nsus lss iwoZ ;g lqfuf'pr dj ysa fd iz'u-i= iw.kZ o lgh gS] ijh{kk ds mijkUr bl
lEcU/k esa dksbZ Hkh nkok Lohdkj ugha fd;k tk;sxkA
Before answering the question, ensure that you have been supplied the correct and
complete question paper, no claim in this regard, will be entertained after
examination.

lkekU; funsZ'k %
General Instructions :

(i) lHkh iz'u vfuok;Z gSaA
All questions are compulsory.

230/ II P. T. O.

(2) 230
(ii) iz'u Øekad 1 ls 35 rd oLrqfu"B iz'u gSaA izR;sd iz'u 1 vad dk gSA
Questions from 1 to 35 are objective type questions. Each question is of
1 mark.

1. thuksVkbi dks ifjHkkf"kr dhft,A 1

Define Genotype.

2. fuEufyf[kr esa ls fdlesa cgqHkzw.krk ikbZ tkrh gS \ 1

(A) ve:n (B) larjk
(C) puk (D) eDdk
In which of the following polyembryony is found ?

(A) Guava (B) Orange

(C) Gram (D) Maize

3. fuEufyf[kr esa ls dkSu-lk ;kSu lapkfjr jksx gS % 1

(A) lqtkd (xksuksfj;k) (B) flfQfyl

(C) ;Ñr'kks/k-ch (D) ;s lHkh

Which of the following is sexually transmitted disease \

(A) Gonorrhoea (B) Syphilis

(C) Hepatitis-B (D) All of these

230/ II

(3) 230

4. fuEufyf[kr esa ls fdl oxZ esa tkfr;ksa dh tSo fofo/krk lcls vf/kd gS % 1

(A) eRL; (B) ljhl`i
(C) i{kh (D) Lru/kkjh
Which of the following taxa have maximum species diversity ?

(A) Fishes (B) Reptiles

(C) Birds (D) Mammals

5. cxqyk vkSj pkj.k i'kq esa ikjLifjd fØ;k fdldk mnkgj.k gS % 1

(A) lgksidkfjrk (B) ijthfork
(C) lgHkksftrk (D) vartkZrh; ijthfork
The interaction between cattle egret and grazing cattle is an example of :

(A) Mutualism (B) Parasitism

(C) Commensalism (D) Amensalism

6. fdl flaMªkse esa ,d O;fDr esa 47 Øksekslkse gksrs gS \ 1

(A) Mkmu (B) DykbZuQsYVj
(C) (A) vkSj (B) nksuksa (D) VuZj
In which syndrome a person has 47 chromosomes ?

(A) Down's (B) Klinefelter's

(C) (A) and (B) both (D) Turner's

230/ II P. T. O.

(4) 230

7. dkSu-lk izkjaHkd izdwV gS \ 1

(A) AAU (B) AAC

(C) AUG (D) AUA

Which is a initiator Codon ?

(A) AAU (B) AAC

(C) AUG (D) AUA

8. ckj ckWMh D;k gS \ 1

What is Barr Body ?

9. dksyksLVªe esa dkSu-lh izfrj{kh izpqj ek=k esa gksrh gS \ 1

(A) IgA (B) IgM

(C) IgE (D) IgG

Which antibodies are abundant in colostrum ?

(A) IgA (B) IgM

(C) IgE (D) IgG

10. fuEu esa ls dkSu-lk vkj0 ,u0 ,0 vuqdwyd v.kq gS \ 1

(A) ,e vkj0 ,u0 ,0 (B) jkbckslksey vkj0 ,u0 ,0
(C) vraj.k vkj0 ,u0 ,0 (D) buesa ls lHkh
Which RNA is called adaptor molecule ?

(A) mRNA (B) rRNA
(C) tRNA (D) All of these

230/ II

(5) 230

11. tc izksbUlqfyu bUlqfyu esa cnyrk gS rc dkSu-lk isIVkbM gVrk gS \ 1

(A) A (B) B

(C) C (D) buesa ls dksbZ ugha
When proinsulin changes into insulin which extra peptide is removed :

(A) A (B) B

(C) C (D) None of these

12. izkadqj pksy D;k gS \ 1

What is Coleoptile ?

13. "Ori" dh Qqy QkWeZ fyf[k,A 1

Write full form of "Ori".

14. fuos'kh fuf"Ø;rk D;k gS \ 1

What is insertional inactivation.

15. ikni dksf'kdk dh dksf'kdk fHkfÙk dks rksM+us ds fy, fdl ,tkabe dk iz;ksx fd;k tkrk gS \ 1

Name the enzyme used to breakdown cell wall of plant cell.

16. lkbVksdkbu jks/k D;k gksrs gS \ 1

What are cytokine barriers ?

17. ,M~l ds fy, O;kid :i ls dke esa yk;k tkus okyk uSnkfud ijh{k.k dk uke fyf[k,A 1

Name the diagnostic test for AIDS.

230/ II P. T. O.

(6) 230

18. jksx dks ifjHkkf"kr dhft,A 1

Define Disease.

19. ifo= miou D;k gksrs gS \ 1

What are sacred groves ?

20. LVsuksFkeZy tho D;k gksrs gS \ 1

What are stenothermal organisms ?

21. MCY;w0 ,p0 vks0 ds vuqlkj tuu LokLF; dh ifjHkk"kk fyf[k,A 1

Define reproductive health according to W. H. O.

22. ih0 lh0 vkj0 dh Qqy QkeZ fyf[k,A 1

Write down full form of P. C. R.

23. viw.kZ izHkkfork esa iq"i jax dh oa'kkxfr ds v/;;u ds fy, dkSu-lk iq"i ,d vPNk mnkgj.k gS \ 1

Which flower is a good example to study inheritance of flower colour in
incomplete dominance ?

24. fuf"Ø; izfrj{kk fdls dgrs gS \ 1

What is passive immunity ?

25. mRifjorZtu D;k gS \ 1

What is mutagen ?

230/ II

(7) 230

26. vkPNknu fdls dgrs gS \ 1

What is Capping ?

27. dkSUk-lk lw{etho flfVªd vEy dks cM+s iSekus ij mRiknu ds fy, iz;ksx fd;k tkrk gS \ 1

Which microbe is used for commercial production of citric acid ?

28. ml thok.kq dk uke fyf[k, tks e`nk esa eqDrkoLFkk esa jgrs gS vkSj ok;qeaMyh; ukbVªkstu fLFkj dj ldrs
gSA 1

Name the bacteria which can fix atmospheric nitrogen while free living in the
soil.

29. ,ySXtSaMj ¶ySfeax us tc isuhlhfyu dh [kkst dh rc og fdl cSDVhfj;k ij dke dj jgk Fkk \ 1

Alexander Fleming was working on which bacteria when he discovered
Penicillin ?

30. Å.kZd D;k gS \ 1
What is flocs ?

31. Mh0 ,u0 ,0 esa isfyaMªkse fdls dgrs gS \ 1

What is Palindrome in DNA ?

32. Qy efD[k;ksa dk oSKkfud uke fyf[k,A 1

Name the scientific name of fruit fly.

33. balqfyu dk ikWyhisIVknM Ük`a[kyk,¡ fdl ca/k }kjk tqM+h gksrh gS \ 1

The polypeptide chains of insulin are linked by which bonds ?

230/ II P. T. O.

(8) 230

34. ,fylk fdl fl)kUr ij vk/kkfjr gS \ 1

ELISA is based on which principle ?

35. thu fpfdRlk D;k gS \ 1

What is Gene Therapy ?

S

230/ II