CBSE Board Paper 2023 | Biology Class 12 - NEET PDF Download

 Page 1


 
57/1/1  JJ JJ Page 1 P.T.O.   
narjmWu àíZ-nÌ H$moS> >H$mo CÎma-nwpñVH$m Ho$ 
_wI-n¥ð >na Adí` {bIo§ & 
Candidates must write the Q.P. Code on 
the title page of the answer-book. 
Series 
E F1 G H / 1
 S E T~ 1 
     
   
 
 
Q.P. Code  
Roll No. 
 
 
 
Ord {dkmZ (g¡ÕmpÝVH$) 
BIOLOGY (Theory) 
* 
: 3 : 70 
Time allowed : 3 hours Maximum Marks : 70 
 
NOTE :
(i) 
- 31
 Please check that this question paper contains 31 printed pages. 
(ii) 
- - -
-
 Q.P. Code given on the right hand side of the question paper should be written on the title 
page of the answer-book by the candidate. 
(iii) 
- 33 
 Please check that this question paper contains 33 questions.  
(iv) 
-
 Please write down the serial number of the question in the answer-book before 
attempting it. 
(v) 
- 15 -
10.15 10.15 10.30 -
-
 15 minute time has been allotted to read this question paper. The question paper  will  be 
 distributed at 10.15 a.m. From 10.15 a.m. to 10.30 a.m., the students will read the 
question paper only and will not write any answer on the answer-book during this period. 
57/1/1
 
Page 2


 
57/1/1  JJ JJ Page 1 P.T.O.   
narjmWu àíZ-nÌ H$moS> >H$mo CÎma-nwpñVH$m Ho$ 
_wI-n¥ð >na Adí` {bIo§ & 
Candidates must write the Q.P. Code on 
the title page of the answer-book. 
Series 
E F1 G H / 1
 S E T~ 1 
     
   
 
 
Q.P. Code  
Roll No. 
 
 
 
Ord {dkmZ (g¡ÕmpÝVH$) 
BIOLOGY (Theory) 
* 
: 3 : 70 
Time allowed : 3 hours Maximum Marks : 70 
 
NOTE :
(i) 
- 31
 Please check that this question paper contains 31 printed pages. 
(ii) 
- - -
-
 Q.P. Code given on the right hand side of the question paper should be written on the title 
page of the answer-book by the candidate. 
(iii) 
- 33 
 Please check that this question paper contains 33 questions.  
(iv) 
-
 Please write down the serial number of the question in the answer-book before 
attempting it. 
(v) 
- 15 -
10.15 10.15 10.30 -
-
 15 minute time has been allotted to read this question paper. The question paper  will  be 
 distributed at 10.15 a.m. From 10.15 a.m. to 10.30 a.m., the students will read the 
question paper only and will not write any answer on the answer-book during this period. 
57/1/1
 
 
57/1/1  JJ JJ Page 2 
: 
: 
(i) 33 
(ii)  
(iii) 1 16 (MCQ)
(iv) 17 21 (VSA)
(v) 22 28 (SA)
(vi) 29 30 
(vii) 31 33 (LA)
(viii) 1 1 
2 3 
(ix) 
IÊS> H$ 
1 16 (MCQ) 16 1=16 
1. {ZåZ{b{IV àH«$_m| _| go {H$g àH«$_ Ho$ n[aUm_
h¢ ?     
(i)  CËn[adV©Z   
(ii) AY©gyÌU I Ho$ Xm¡amZ ñdV§Ì Anì`yhZ   
(iii) AY©gyÌU II Ho$ Xm¡amZ ñdV§Ì Anì`yhZ  
(iv) `wJbr H$m {d{Z_`  
(a) Ho$db (iv) 
(b) (ii) VWm (iv) 
(c) (i), (ii) VWm (iii) 
(d) (i), (ii), (iii) VWm (iv)  
Page 3


 
57/1/1  JJ JJ Page 1 P.T.O.   
narjmWu àíZ-nÌ H$moS> >H$mo CÎma-nwpñVH$m Ho$ 
_wI-n¥ð >na Adí` {bIo§ & 
Candidates must write the Q.P. Code on 
the title page of the answer-book. 
Series 
E F1 G H / 1
 S E T~ 1 
     
   
 
 
Q.P. Code  
Roll No. 
 
 
 
Ord {dkmZ (g¡ÕmpÝVH$) 
BIOLOGY (Theory) 
* 
: 3 : 70 
Time allowed : 3 hours Maximum Marks : 70 
 
NOTE :
(i) 
- 31
 Please check that this question paper contains 31 printed pages. 
(ii) 
- - -
-
 Q.P. Code given on the right hand side of the question paper should be written on the title 
page of the answer-book by the candidate. 
(iii) 
- 33 
 Please check that this question paper contains 33 questions.  
(iv) 
-
 Please write down the serial number of the question in the answer-book before 
attempting it. 
(v) 
- 15 -
10.15 10.15 10.30 -
-
 15 minute time has been allotted to read this question paper. The question paper  will  be 
 distributed at 10.15 a.m. From 10.15 a.m. to 10.30 a.m., the students will read the 
question paper only and will not write any answer on the answer-book during this period. 
57/1/1
 
 
57/1/1  JJ JJ Page 2 
: 
: 
(i) 33 
(ii)  
(iii) 1 16 (MCQ)
(iv) 17 21 (VSA)
(v) 22 28 (SA)
(vi) 29 30 
(vii) 31 33 (LA)
(viii) 1 1 
2 3 
(ix) 
IÊS> H$ 
1 16 (MCQ) 16 1=16 
1. {ZåZ{b{IV àH«$_m| _| go {H$g àH«$_ Ho$ n[aUm_
h¢ ?     
(i)  CËn[adV©Z   
(ii) AY©gyÌU I Ho$ Xm¡amZ ñdV§Ì Anì`yhZ   
(iii) AY©gyÌU II Ho$ Xm¡amZ ñdV§Ì Anì`yhZ  
(iv) `wJbr H$m {d{Z_`  
(a) Ho$db (iv) 
(b) (ii) VWm (iv) 
(c) (i), (ii) VWm (iii) 
(d) (i), (ii), (iii) VWm (iv)  
 
57/1/1  JJ JJ Page 3 P.T.O.   
General Instructions : 
Read the following instructions carefully and strictly follow them : 
(i) This question paper contains 33 questions. All questions are compulsory.  
(ii) This question paper is divided into five sections  Section A, B, C, D and E.  
(iii) In Section A  Questions no. 1 to 16 are multiple choice (MCQ) type questions, 
carrying 1 mark each.  
(iv) In Section B  Questions no. 17 to 21 are very short answer (VSA) type 
questions, carrying 2 marks each.  
(v) In Section C  Questions no. 22 to 28 are short answer (SA) type questions, 
carrying 3 marks each. 
(vi) In Section D  Questions no. 29 and 30 are case-based questions, carrying  
4 marks each.  
(vii) In Section E  Questions no. 31 to 33 are long answer (LA) type questions, 
carrying 5 marks each.   
(viii) There is no overall choice. However, an internal choice has been provided in  
1 question in Section B, 1 question in Section C, 2 questions in Section D and  
3 questions in Section E. A candidate has to attempt only one of the 
alternatives in such questions.   
(ix) Use of calculators is not allowed.  
SECTION A 
Questions no. 1 to 16 are Multiple Choice (MCQ) type Questions, carrying  
1 mark each.       16 1=16 
1. Which one of the following processes results in the production of 
recombinants in future generations ? 
(i) Mutation  
(ii) Independent assortment during meiosis I 
(iii) Independent assortment during meiosis II  
(iv) Crossing over of bivalents 
(a) (iv) only  
(b) (ii) and (iv) 
(c) (i), (ii) and (iii)  
(d) (i), (ii), (iii) and (iv) 
Page 4


 
57/1/1  JJ JJ Page 1 P.T.O.   
narjmWu àíZ-nÌ H$moS> >H$mo CÎma-nwpñVH$m Ho$ 
_wI-n¥ð >na Adí` {bIo§ & 
Candidates must write the Q.P. Code on 
the title page of the answer-book. 
Series 
E F1 G H / 1
 S E T~ 1 
     
   
 
 
Q.P. Code  
Roll No. 
 
 
 
Ord {dkmZ (g¡ÕmpÝVH$) 
BIOLOGY (Theory) 
* 
: 3 : 70 
Time allowed : 3 hours Maximum Marks : 70 
 
NOTE :
(i) 
- 31
 Please check that this question paper contains 31 printed pages. 
(ii) 
- - -
-
 Q.P. Code given on the right hand side of the question paper should be written on the title 
page of the answer-book by the candidate. 
(iii) 
- 33 
 Please check that this question paper contains 33 questions.  
(iv) 
-
 Please write down the serial number of the question in the answer-book before 
attempting it. 
(v) 
- 15 -
10.15 10.15 10.30 -
-
 15 minute time has been allotted to read this question paper. The question paper  will  be 
 distributed at 10.15 a.m. From 10.15 a.m. to 10.30 a.m., the students will read the 
question paper only and will not write any answer on the answer-book during this period. 
57/1/1
 
 
57/1/1  JJ JJ Page 2 
: 
: 
(i) 33 
(ii)  
(iii) 1 16 (MCQ)
(iv) 17 21 (VSA)
(v) 22 28 (SA)
(vi) 29 30 
(vii) 31 33 (LA)
(viii) 1 1 
2 3 
(ix) 
IÊS> H$ 
1 16 (MCQ) 16 1=16 
1. {ZåZ{b{IV àH«$_m| _| go {H$g àH«$_ Ho$ n[aUm_
h¢ ?     
(i)  CËn[adV©Z   
(ii) AY©gyÌU I Ho$ Xm¡amZ ñdV§Ì Anì`yhZ   
(iii) AY©gyÌU II Ho$ Xm¡amZ ñdV§Ì Anì`yhZ  
(iv) `wJbr H$m {d{Z_`  
(a) Ho$db (iv) 
(b) (ii) VWm (iv) 
(c) (i), (ii) VWm (iii) 
(d) (i), (ii), (iii) VWm (iv)  
 
57/1/1  JJ JJ Page 3 P.T.O.   
General Instructions : 
Read the following instructions carefully and strictly follow them : 
(i) This question paper contains 33 questions. All questions are compulsory.  
(ii) This question paper is divided into five sections  Section A, B, C, D and E.  
(iii) In Section A  Questions no. 1 to 16 are multiple choice (MCQ) type questions, 
carrying 1 mark each.  
(iv) In Section B  Questions no. 17 to 21 are very short answer (VSA) type 
questions, carrying 2 marks each.  
(v) In Section C  Questions no. 22 to 28 are short answer (SA) type questions, 
carrying 3 marks each. 
(vi) In Section D  Questions no. 29 and 30 are case-based questions, carrying  
4 marks each.  
(vii) In Section E  Questions no. 31 to 33 are long answer (LA) type questions, 
carrying 5 marks each.   
(viii) There is no overall choice. However, an internal choice has been provided in  
1 question in Section B, 1 question in Section C, 2 questions in Section D and  
3 questions in Section E. A candidate has to attempt only one of the 
alternatives in such questions.   
(ix) Use of calculators is not allowed.  
SECTION A 
Questions no. 1 to 16 are Multiple Choice (MCQ) type Questions, carrying  
1 mark each.       16 1=16 
1. Which one of the following processes results in the production of 
recombinants in future generations ? 
(i) Mutation  
(ii) Independent assortment during meiosis I 
(iii) Independent assortment during meiosis II  
(iv) Crossing over of bivalents 
(a) (iv) only  
(b) (ii) and (iv) 
(c) (i), (ii) and (iii)  
(d) (i), (ii), (iii) and (iv) 
 
57/1/1  JJ JJ Page 4 
2. ZrMo {XE JE ì`dñWmnH$ {Zê$nU _| Xem©E AZwgma Agr_H|$Ðr _| AZwboIZ àH«$_ _| 
gpå_{bV ñWb , \ VWm E§µOmB_ H$mo nhMm{ZE &  
 
 ñWb X \ Y E§µOmB_ Z 
(a) g_mnH {g½_m ( ) AmaEZE nm°br_aoµO $ 
(b) CÞm`H amo ( ) AmaEZE nm°br_aoµO $ 
(c) CÞm`H {g½_m ( ) AmaEZE nm°br_aoµO 
(d) CÞm`H  {g½_m ( ) S>rEZE nm°br_aoµO 
3. _mZd g_{îQ> H$s AdpñW{V H$mo ZrMo {XE JE _mZd Am`w {na¡{_S> Ûmam {Zê${nV {H$`m J`m 
h¡ :   
 
(a) KQ>Vr g_{îQ>   
(b) pñWa g_{îQ>  
(c) àgmar g_{îQ> 
(d) {dbwßV g_{îQ >  
 OÝ_moÎma 
 OZZj_ 
 OÝ_nyd© 
Page 5


 
57/1/1  JJ JJ Page 1 P.T.O.   
narjmWu àíZ-nÌ H$moS> >H$mo CÎma-nwpñVH$m Ho$ 
_wI-n¥ð >na Adí` {bIo§ & 
Candidates must write the Q.P. Code on 
the title page of the answer-book. 
Series 
E F1 G H / 1
 S E T~ 1 
     
   
 
 
Q.P. Code  
Roll No. 
 
 
 
Ord {dkmZ (g¡ÕmpÝVH$) 
BIOLOGY (Theory) 
* 
: 3 : 70 
Time allowed : 3 hours Maximum Marks : 70 
 
NOTE :
(i) 
- 31
 Please check that this question paper contains 31 printed pages. 
(ii) 
- - -
-
 Q.P. Code given on the right hand side of the question paper should be written on the title 
page of the answer-book by the candidate. 
(iii) 
- 33 
 Please check that this question paper contains 33 questions.  
(iv) 
-
 Please write down the serial number of the question in the answer-book before 
attempting it. 
(v) 
- 15 -
10.15 10.15 10.30 -
-
 15 minute time has been allotted to read this question paper. The question paper  will  be 
 distributed at 10.15 a.m. From 10.15 a.m. to 10.30 a.m., the students will read the 
question paper only and will not write any answer on the answer-book during this period. 
57/1/1
 
 
57/1/1  JJ JJ Page 2 
: 
: 
(i) 33 
(ii)  
(iii) 1 16 (MCQ)
(iv) 17 21 (VSA)
(v) 22 28 (SA)
(vi) 29 30 
(vii) 31 33 (LA)
(viii) 1 1 
2 3 
(ix) 
IÊS> H$ 
1 16 (MCQ) 16 1=16 
1. {ZåZ{b{IV àH«$_m| _| go {H$g àH«$_ Ho$ n[aUm_
h¢ ?     
(i)  CËn[adV©Z   
(ii) AY©gyÌU I Ho$ Xm¡amZ ñdV§Ì Anì`yhZ   
(iii) AY©gyÌU II Ho$ Xm¡amZ ñdV§Ì Anì`yhZ  
(iv) `wJbr H$m {d{Z_`  
(a) Ho$db (iv) 
(b) (ii) VWm (iv) 
(c) (i), (ii) VWm (iii) 
(d) (i), (ii), (iii) VWm (iv)  
 
57/1/1  JJ JJ Page 3 P.T.O.   
General Instructions : 
Read the following instructions carefully and strictly follow them : 
(i) This question paper contains 33 questions. All questions are compulsory.  
(ii) This question paper is divided into five sections  Section A, B, C, D and E.  
(iii) In Section A  Questions no. 1 to 16 are multiple choice (MCQ) type questions, 
carrying 1 mark each.  
(iv) In Section B  Questions no. 17 to 21 are very short answer (VSA) type 
questions, carrying 2 marks each.  
(v) In Section C  Questions no. 22 to 28 are short answer (SA) type questions, 
carrying 3 marks each. 
(vi) In Section D  Questions no. 29 and 30 are case-based questions, carrying  
4 marks each.  
(vii) In Section E  Questions no. 31 to 33 are long answer (LA) type questions, 
carrying 5 marks each.   
(viii) There is no overall choice. However, an internal choice has been provided in  
1 question in Section B, 1 question in Section C, 2 questions in Section D and  
3 questions in Section E. A candidate has to attempt only one of the 
alternatives in such questions.   
(ix) Use of calculators is not allowed.  
SECTION A 
Questions no. 1 to 16 are Multiple Choice (MCQ) type Questions, carrying  
1 mark each.       16 1=16 
1. Which one of the following processes results in the production of 
recombinants in future generations ? 
(i) Mutation  
(ii) Independent assortment during meiosis I 
(iii) Independent assortment during meiosis II  
(iv) Crossing over of bivalents 
(a) (iv) only  
(b) (ii) and (iv) 
(c) (i), (ii) and (iii)  
(d) (i), (ii), (iii) and (iv) 
 
57/1/1  JJ JJ Page 4 
2. ZrMo {XE JE ì`dñWmnH$ {Zê$nU _| Xem©E AZwgma Agr_H|$Ðr _| AZwboIZ àH«$_ _| 
gpå_{bV ñWb , \ VWm E§µOmB_ H$mo nhMm{ZE &  
 
 ñWb X \ Y E§µOmB_ Z 
(a) g_mnH {g½_m ( ) AmaEZE nm°br_aoµO $ 
(b) CÞm`H amo ( ) AmaEZE nm°br_aoµO $ 
(c) CÞm`H {g½_m ( ) AmaEZE nm°br_aoµO 
(d) CÞm`H  {g½_m ( ) S>rEZE nm°br_aoµO 
3. _mZd g_{îQ> H$s AdpñW{V H$mo ZrMo {XE JE _mZd Am`w {na¡{_S> Ûmam {Zê${nV {H$`m J`m 
h¡ :   
 
(a) KQ>Vr g_{îQ>   
(b) pñWa g_{îQ>  
(c) àgmar g_{îQ> 
(d) {dbwßV g_{îQ >  
 OÝ_moÎma 
 OZZj_ 
 OÝ_nyd© 
 
57/1/1  JJ JJ Page 5 P.T.O.   
2. Identify the region 
process of transcription in prokaryote as shown in the schematic 
representation given below. 
 
 
 Region  Factor Y Enzyme Z 
(a) Terminator Sigma ( ) RNA polymerase 
(b) Promoter Rho ( ) RNA polymerase 
(c) Promoter Sigma ( ) RNA polymerase 
(d) Promoter Sigma ( ) DNA polymerase  
3. The status of the human population reflected in the human age pyramid 
given below is :  
 
(a) Declining population  
(b) Stable population 
(c) Expanding population  
(d) Extinct population 
 Post-Reproductive 
 Reproductive  
 Pre-Reproductive