Past Year Paper - Biology (Set - 3), Delhi, 2015, Class 12, Biology | Additional Study Material for NEET PDF Download

 Page 1


57/1/3 1 [P.T.O. 
 
 
 
 
¸üÖê»Ö ®ÖÓ. 
Roll No.  
 
 
 
•Öß¾Ö ×¾Ö–ÖÖ®Ö (ÃÖî¨üÖ×®ŸÖÛú) 
BIOLOGY (Theory)  
×®Ö¬ÖÖÔ׸üŸÖ ÃÖ´ÖµÖ  :    3 ‘ÖÓ™êü ] [ †×¬ÖÛúŸÖ´Ö †ÓÛú  : 70 
Time allowed : 3 hours ] [ Maximum Marks : 70 
 
ÃÖÖ´ÖÖ®µÖ ×®Ö¤ìü¿Ö    : : : :   
    (i) ¯ÖÏ¿®Ö-¯Ö¡Ö ´Öë ¯ÖÖÑ“Ö ÜÖÞ›üÖë ´Öë 26 ¯ÖÏ¿®Ö פü‹ ÝÖ‹ Æïü … ÃÖ³Öß ¯ÖÏ¿®Ö †×®Ö¾ÖÖµÖÔ Æïü … 
 (ii) ÜÖÞ›ü – Ûú ´Öë ¯ÖÏ¿®Ö ÃÖÓܵÖÖ 1 ÃÖê 5 †×ŸÖ »Ö‘Öã¢Ö¸ü ¯ÖÏ¿®Ö Æïü … ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö ‹Ûú †ÓÛú ÛúÖ Æîü …  
 (iii) ÜÖÞ›ü – ÜÖ ´Öë ¯ÖÏ¿®Ö ÃÖÓܵÖÖ 6 ÃÖê 10 »Ö‘Öã¢Ö¸ü ¯ÖÏ¿®Ö I ¯ÖÏÛúÖ¸ü Ûêú Æïü … ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö ¤üÖê †ÓÛú ÛúÖ Æîü …  
 (iv) ÜÖÞ›ü – ÝÖ ´Öë ¯ÖÏ¿®Ö ÃÖÓܵÖÖ 11 ÃÖê 22 »Ö‘Öã¢Ö¸ü ¯ÖÏ¿®Ö II ¯ÖÏÛúÖ¸ü Ûêú Æïü … ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö ŸÖß®Ö †ÓÛú ÛúÖ Æîüü …  
 (v) ÜÖÞ›ü – ‘Ö ´Öë ¯ÖÏ¿®Ö ÃÖÓܵÖÖ 23 ´Ö滵ÖÖ¬ÖÖ׸üŸÖ ¯ÖÏ¿®Ö “ÖÖ¸ü †ÓÛúÖë ÛúÖ Æîü …  
 (vi) ÜÖÞ›ü – ’û  ´Öë ¯ÖÏ¿®Ö ÃÖÓܵÖÖ 24 ÃÖê 26 ¤üß‘ÖÔ ˆ¢Ö¸ü ¯ÖÏ¿®Ö Æïü, ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö ¯ÖÖÑ“Ö †ÓÛú ÛúÖ Æîü …  
 (vii) ¯ÖÏ¿®Ö-¯Ö¡Ö ´Öë ÛúÖê‡Ô ÃÖ´ÖÝÖÏ ¯Ö¸ü ×¾ÖÛú»¯Ö ®ÖÆüà Æîü, ×±ú¸ü ³Öß ¤üÖê †ÓÛú Ûêú ‹Ûú ¯ÖÏ¿®Ö, ŸÖß®Ö †ÓÛú Ûêú ‹Ûú ¯ÖÏ¿®Ö †Öî¸ü 
¯ÖÖÑ“Ö †ÓÛúÖë Ûêú ŸÖß®Ö ¯ÖÏ¿®ÖÖë Ûêú ³Öߟָüß ×¾ÖÛú»¯Ö פü‹ ÝÖ‹ Æïü … ¯ÖÏŸµÖêÛú ¯Ö¸üßõÖÖ£Öá ÛúÖê ‹êÃÖê ¯ÖÏ¿®ÖÖë Ûêú ¤üÖê ×¾ÖÛú»¯ÖÖë ´Öë 
ÃÖê ‹Ûú ¯ÖÏ¿®Ö Æü»Ö Ûú¸ü®ÖÖ Æîü …  
 Series : SSO/1/C 
57/1/3
• Ûéú¯ÖµÖÖ •ÖÖÑ“Ö Ûú¸ü »Öë ×Ûú ‡ÃÖ ¯ÖÏ¿®Ö-¯Ö¡Ö ´Öë ´ÖãצüŸÖ ¯Öéšü 8 Æïü … 
• ¯ÖÏ¿®Ö-¯Ö¡Ö ´Öë ¤üÖ×Æü®Öê ÆüÖ£Ö Ûúß †Öê¸ü פü‹ ÝÖ‹ ÛúÖê›ü ®Ö´²Ö¸ü ÛúÖê ”ûÖ¡Ö ˆ¢Ö¸ü-¯Öã×ßÖÛúÖ Ûêú ´ÖãÜÖ-¯Öéšü ¯Ö¸ü ×»ÖÜÖë …  
• Ûéú¯ÖµÖÖ •ÖÖÑ“Ö Ûú¸ü »Öë ×Ûú ‡ÃÖ ¯ÖÏ¿®Ö-¯Ö¡Ö ´Öë 26 ¯ÖÏ¿®Ö Æïü …  
• Ûéú¯ÖµÖÖ ¯ÖÏ¿®Ö ÛúÖ ˆ¢Ö¸ü ×»ÖÜÖ®ÖÖ ¿Öãºþ Ûú¸ü®Öê ÃÖê ¯ÖÆü»Öê, ¯ÖÏ¿®Ö ÛúÖ ÛÎú´ÖÖÓÛú †¾Ö¿µÖ ×»ÖÜÖë …  
• ‡ÃÖ ¯ÖÏ¿®Ö-¯Ö¡Ö ÛúÖê ¯ÖœÌü®Öê Ûêú ×»Ö‹ 15 ×´Ö®Ö™ü ÛúÖ ÃÖ´ÖµÖ ×¤üµÖÖ ÝÖµÖÖ Æîü … ¯ÖÏ¿®Ö-¯Ö¡Ö ÛúÖ ×¾ÖŸÖ¸üÞÖ ¯Öæ¾ÖÖÔÆËü®Ö ´Öë 10.15 ²Ö•Öê 
×ÛúµÖÖ •ÖÖµÖêÝÖÖ … 10.15 ²Ö•Öê ÃÖê 10.30 ²Ö•Öê ŸÖÛú ”ûÖ¡Ö Ûêú¾Ö»Ö ¯ÖÏ¿®Ö-¯Ö¡Ö ÛúÖê ¯ÖœÌëüÝÖê †Öî¸ü ‡ÃÖ †¾Ö×¬Ö Ûêú ¤üÖî¸üÖ®Ö ¾Öê 
ˆ¢Ö¸ü-¯Öã×ßÖÛúÖ ¯Ö¸ü ÛúÖê‡Ô ˆ¢Ö¸ü ®ÖÆüà ×»ÖÜÖëÝÖê …  
• Please check that this question paper contains 8 printed pages. 
• Code number given on the right hand side of the question paper should be written on the 
title page of the answer-book by the candidate. 
• Please check that this question paper contains 26 questions. 
• Please write down the Serial Number of the question before attempting it. 
• 15 minutes 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. 
ÛúÖê›ü ®ÖÓ. 
Code No.  
    
¯Ö¸üßõÖÖ£Öá ÛúÖê›ü ÛúÖê ˆ¢Ö¸ü-¯Öã×ßÖÛúÖ Ûêú ´ÖãÜÖ-¯Öéšü 
¯Ö¸ü †¾Ö¿µÖ ×»ÖÜÖë … 
Candidates must write the Code on 
the title page of the answer-book. 
 
SET – 3 
Page 2


57/1/3 1 [P.T.O. 
 
 
 
 
¸üÖê»Ö ®ÖÓ. 
Roll No.  
 
 
 
•Öß¾Ö ×¾Ö–ÖÖ®Ö (ÃÖî¨üÖ×®ŸÖÛú) 
BIOLOGY (Theory)  
×®Ö¬ÖÖÔ׸üŸÖ ÃÖ´ÖµÖ  :    3 ‘ÖÓ™êü ] [ †×¬ÖÛúŸÖ´Ö †ÓÛú  : 70 
Time allowed : 3 hours ] [ Maximum Marks : 70 
 
ÃÖÖ´ÖÖ®µÖ ×®Ö¤ìü¿Ö    : : : :   
    (i) ¯ÖÏ¿®Ö-¯Ö¡Ö ´Öë ¯ÖÖÑ“Ö ÜÖÞ›üÖë ´Öë 26 ¯ÖÏ¿®Ö פü‹ ÝÖ‹ Æïü … ÃÖ³Öß ¯ÖÏ¿®Ö †×®Ö¾ÖÖµÖÔ Æïü … 
 (ii) ÜÖÞ›ü – Ûú ´Öë ¯ÖÏ¿®Ö ÃÖÓܵÖÖ 1 ÃÖê 5 †×ŸÖ »Ö‘Öã¢Ö¸ü ¯ÖÏ¿®Ö Æïü … ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö ‹Ûú †ÓÛú ÛúÖ Æîü …  
 (iii) ÜÖÞ›ü – ÜÖ ´Öë ¯ÖÏ¿®Ö ÃÖÓܵÖÖ 6 ÃÖê 10 »Ö‘Öã¢Ö¸ü ¯ÖÏ¿®Ö I ¯ÖÏÛúÖ¸ü Ûêú Æïü … ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö ¤üÖê †ÓÛú ÛúÖ Æîü …  
 (iv) ÜÖÞ›ü – ÝÖ ´Öë ¯ÖÏ¿®Ö ÃÖÓܵÖÖ 11 ÃÖê 22 »Ö‘Öã¢Ö¸ü ¯ÖÏ¿®Ö II ¯ÖÏÛúÖ¸ü Ûêú Æïü … ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö ŸÖß®Ö †ÓÛú ÛúÖ Æîüü …  
 (v) ÜÖÞ›ü – ‘Ö ´Öë ¯ÖÏ¿®Ö ÃÖÓܵÖÖ 23 ´Ö滵ÖÖ¬ÖÖ׸üŸÖ ¯ÖÏ¿®Ö “ÖÖ¸ü †ÓÛúÖë ÛúÖ Æîü …  
 (vi) ÜÖÞ›ü – ’û  ´Öë ¯ÖÏ¿®Ö ÃÖÓܵÖÖ 24 ÃÖê 26 ¤üß‘ÖÔ ˆ¢Ö¸ü ¯ÖÏ¿®Ö Æïü, ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö ¯ÖÖÑ“Ö †ÓÛú ÛúÖ Æîü …  
 (vii) ¯ÖÏ¿®Ö-¯Ö¡Ö ´Öë ÛúÖê‡Ô ÃÖ´ÖÝÖÏ ¯Ö¸ü ×¾ÖÛú»¯Ö ®ÖÆüà Æîü, ×±ú¸ü ³Öß ¤üÖê †ÓÛú Ûêú ‹Ûú ¯ÖÏ¿®Ö, ŸÖß®Ö †ÓÛú Ûêú ‹Ûú ¯ÖÏ¿®Ö †Öî¸ü 
¯ÖÖÑ“Ö †ÓÛúÖë Ûêú ŸÖß®Ö ¯ÖÏ¿®ÖÖë Ûêú ³Öߟָüß ×¾ÖÛú»¯Ö פü‹ ÝÖ‹ Æïü … ¯ÖÏŸµÖêÛú ¯Ö¸üßõÖÖ£Öá ÛúÖê ‹êÃÖê ¯ÖÏ¿®ÖÖë Ûêú ¤üÖê ×¾ÖÛú»¯ÖÖë ´Öë 
ÃÖê ‹Ûú ¯ÖÏ¿®Ö Æü»Ö Ûú¸ü®ÖÖ Æîü …  
 Series : SSO/1/C 
57/1/3
• Ûéú¯ÖµÖÖ •ÖÖÑ“Ö Ûú¸ü »Öë ×Ûú ‡ÃÖ ¯ÖÏ¿®Ö-¯Ö¡Ö ´Öë ´ÖãצüŸÖ ¯Öéšü 8 Æïü … 
• ¯ÖÏ¿®Ö-¯Ö¡Ö ´Öë ¤üÖ×Æü®Öê ÆüÖ£Ö Ûúß †Öê¸ü פü‹ ÝÖ‹ ÛúÖê›ü ®Ö´²Ö¸ü ÛúÖê ”ûÖ¡Ö ˆ¢Ö¸ü-¯Öã×ßÖÛúÖ Ûêú ´ÖãÜÖ-¯Öéšü ¯Ö¸ü ×»ÖÜÖë …  
• Ûéú¯ÖµÖÖ •ÖÖÑ“Ö Ûú¸ü »Öë ×Ûú ‡ÃÖ ¯ÖÏ¿®Ö-¯Ö¡Ö ´Öë 26 ¯ÖÏ¿®Ö Æïü …  
• Ûéú¯ÖµÖÖ ¯ÖÏ¿®Ö ÛúÖ ˆ¢Ö¸ü ×»ÖÜÖ®ÖÖ ¿Öãºþ Ûú¸ü®Öê ÃÖê ¯ÖÆü»Öê, ¯ÖÏ¿®Ö ÛúÖ ÛÎú´ÖÖÓÛú †¾Ö¿µÖ ×»ÖÜÖë …  
• ‡ÃÖ ¯ÖÏ¿®Ö-¯Ö¡Ö ÛúÖê ¯ÖœÌü®Öê Ûêú ×»Ö‹ 15 ×´Ö®Ö™ü ÛúÖ ÃÖ´ÖµÖ ×¤üµÖÖ ÝÖµÖÖ Æîü … ¯ÖÏ¿®Ö-¯Ö¡Ö ÛúÖ ×¾ÖŸÖ¸üÞÖ ¯Öæ¾ÖÖÔÆËü®Ö ´Öë 10.15 ²Ö•Öê 
×ÛúµÖÖ •ÖÖµÖêÝÖÖ … 10.15 ²Ö•Öê ÃÖê 10.30 ²Ö•Öê ŸÖÛú ”ûÖ¡Ö Ûêú¾Ö»Ö ¯ÖÏ¿®Ö-¯Ö¡Ö ÛúÖê ¯ÖœÌëüÝÖê †Öî¸ü ‡ÃÖ †¾Ö×¬Ö Ûêú ¤üÖî¸üÖ®Ö ¾Öê 
ˆ¢Ö¸ü-¯Öã×ßÖÛúÖ ¯Ö¸ü ÛúÖê‡Ô ˆ¢Ö¸ü ®ÖÆüà ×»ÖÜÖëÝÖê …  
• Please check that this question paper contains 8 printed pages. 
• Code number given on the right hand side of the question paper should be written on the 
title page of the answer-book by the candidate. 
• Please check that this question paper contains 26 questions. 
• Please write down the Serial Number of the question before attempting it. 
• 15 minutes 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. 
ÛúÖê›ü ®ÖÓ. 
Code No.  
    
¯Ö¸üßõÖÖ£Öá ÛúÖê›ü ÛúÖê ˆ¢Ö¸ü-¯Öã×ßÖÛúÖ Ûêú ´ÖãÜÖ-¯Öéšü 
¯Ö¸ü †¾Ö¿µÖ ×»ÖÜÖë … 
Candidates must write the Code on 
the title page of the answer-book. 
 
SET – 3 
57/1/3 2  
General Instructions :   
 (i) There are a total of 26 questions and five sections in the question paper.                     
All questions are compulsory. 
 (ii) Section A contains question number 1 to 5, Very Short Answer type questions of 
one mark each. 
 (iii) Section B contains question number 6 to 10, Short Answer type I questions of two 
marks each. 
 (iv) Section C contains question number 11 to 22, Short Answer type II questions of 
three marks each. 
 (v) Section D contains question number 23, Value Based Question of four marks. 
 (vi) Section E contains question number 24 to 26, Long Answer type questions of five 
marks each. 
 (vii) There is no overall choice in the question paper, however, an internal choice is 
provided in one question of two marks, one question of three marks and all three 
questions of five marks. An examinee is to attempt any one of the questions out of 
the two given in the question paper with the same question number.  
 
ÜÖÞ›ü – Ûú 
SECTION – A 
1. ®µÖæ׌»Ö†ÖêÃÖÖê´Ö Ûêú ŠúÞÖÖŸ´ÖÛú ŸÖ£ÖÖ ¬Ö®ÖÖŸ´ÖÛú ºþ¯Ö ÃÖê †Ö¾Öê×¿ÖŸÖ ÃÖÓ‘Ö™üÛúÖë Ûêú ®ÖÖ´Ö ²ÖŸÖÖ‡‹ …  1 
 Name the negatively charged and positively charged components of a nucleosome.  
 
2. ²ÖÖ®ÖìÛú»ÖÖë †Öî¸ü ÆËü¾Öê»Ö Ûêú ²Öß“Ö ¯ÖÖ‹ •ÖÖ®Öê ¾ÖÖ»Öß ¯ÖÖ¸üïÖ׸üÛú ×ÛÎúµÖÖ Ûêú ¯ÖÏÛúÖ¸ü ÛúÖ ®ÖÖ´Ö ²ÖŸÖÖ‡‹ …  1 
 Name the type of interaction that exists between barnacles and whale.  
 
3.
                          
 µÖÆüÖÑ ×¤ü‹ ÝÖ‹ ¤üÖê ד֡ÖÖë ´Öë ¯Öî¯Öê¾Ö¸ü (A) †Öî¸ü ´ÖÖ‡Ûêú×»ÖµÖÖ (B) Ûêú ¯Öã¯ÖÖë Ûêú •ÖÖµÖÖÓÝÖ (áÖßÛêúÃÖ¸ü) ¤ü¿ÖÖÔ‹ ÝÖ‹ Æïü … ‡®ÖÛêú 
†Ó›üÖ¿ÖµÖÖë Ûúß ÃÖÓ¸ü“Ö®ÖÖ ´Öë †ÓŸÖ¸ü ²ÖŸÖÖ‡‹ …  1 
Page 3


57/1/3 1 [P.T.O. 
 
 
 
 
¸üÖê»Ö ®ÖÓ. 
Roll No.  
 
 
 
•Öß¾Ö ×¾Ö–ÖÖ®Ö (ÃÖî¨üÖ×®ŸÖÛú) 
BIOLOGY (Theory)  
×®Ö¬ÖÖÔ׸üŸÖ ÃÖ´ÖµÖ  :    3 ‘ÖÓ™êü ] [ †×¬ÖÛúŸÖ´Ö †ÓÛú  : 70 
Time allowed : 3 hours ] [ Maximum Marks : 70 
 
ÃÖÖ´ÖÖ®µÖ ×®Ö¤ìü¿Ö    : : : :   
    (i) ¯ÖÏ¿®Ö-¯Ö¡Ö ´Öë ¯ÖÖÑ“Ö ÜÖÞ›üÖë ´Öë 26 ¯ÖÏ¿®Ö פü‹ ÝÖ‹ Æïü … ÃÖ³Öß ¯ÖÏ¿®Ö †×®Ö¾ÖÖµÖÔ Æïü … 
 (ii) ÜÖÞ›ü – Ûú ´Öë ¯ÖÏ¿®Ö ÃÖÓܵÖÖ 1 ÃÖê 5 †×ŸÖ »Ö‘Öã¢Ö¸ü ¯ÖÏ¿®Ö Æïü … ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö ‹Ûú †ÓÛú ÛúÖ Æîü …  
 (iii) ÜÖÞ›ü – ÜÖ ´Öë ¯ÖÏ¿®Ö ÃÖÓܵÖÖ 6 ÃÖê 10 »Ö‘Öã¢Ö¸ü ¯ÖÏ¿®Ö I ¯ÖÏÛúÖ¸ü Ûêú Æïü … ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö ¤üÖê †ÓÛú ÛúÖ Æîü …  
 (iv) ÜÖÞ›ü – ÝÖ ´Öë ¯ÖÏ¿®Ö ÃÖÓܵÖÖ 11 ÃÖê 22 »Ö‘Öã¢Ö¸ü ¯ÖÏ¿®Ö II ¯ÖÏÛúÖ¸ü Ûêú Æïü … ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö ŸÖß®Ö †ÓÛú ÛúÖ Æîüü …  
 (v) ÜÖÞ›ü – ‘Ö ´Öë ¯ÖÏ¿®Ö ÃÖÓܵÖÖ 23 ´Ö滵ÖÖ¬ÖÖ׸üŸÖ ¯ÖÏ¿®Ö “ÖÖ¸ü †ÓÛúÖë ÛúÖ Æîü …  
 (vi) ÜÖÞ›ü – ’û  ´Öë ¯ÖÏ¿®Ö ÃÖÓܵÖÖ 24 ÃÖê 26 ¤üß‘ÖÔ ˆ¢Ö¸ü ¯ÖÏ¿®Ö Æïü, ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö ¯ÖÖÑ“Ö †ÓÛú ÛúÖ Æîü …  
 (vii) ¯ÖÏ¿®Ö-¯Ö¡Ö ´Öë ÛúÖê‡Ô ÃÖ´ÖÝÖÏ ¯Ö¸ü ×¾ÖÛú»¯Ö ®ÖÆüà Æîü, ×±ú¸ü ³Öß ¤üÖê †ÓÛú Ûêú ‹Ûú ¯ÖÏ¿®Ö, ŸÖß®Ö †ÓÛú Ûêú ‹Ûú ¯ÖÏ¿®Ö †Öî¸ü 
¯ÖÖÑ“Ö †ÓÛúÖë Ûêú ŸÖß®Ö ¯ÖÏ¿®ÖÖë Ûêú ³Öߟָüß ×¾ÖÛú»¯Ö פü‹ ÝÖ‹ Æïü … ¯ÖÏŸµÖêÛú ¯Ö¸üßõÖÖ£Öá ÛúÖê ‹êÃÖê ¯ÖÏ¿®ÖÖë Ûêú ¤üÖê ×¾ÖÛú»¯ÖÖë ´Öë 
ÃÖê ‹Ûú ¯ÖÏ¿®Ö Æü»Ö Ûú¸ü®ÖÖ Æîü …  
 Series : SSO/1/C 
57/1/3
• Ûéú¯ÖµÖÖ •ÖÖÑ“Ö Ûú¸ü »Öë ×Ûú ‡ÃÖ ¯ÖÏ¿®Ö-¯Ö¡Ö ´Öë ´ÖãצüŸÖ ¯Öéšü 8 Æïü … 
• ¯ÖÏ¿®Ö-¯Ö¡Ö ´Öë ¤üÖ×Æü®Öê ÆüÖ£Ö Ûúß †Öê¸ü פü‹ ÝÖ‹ ÛúÖê›ü ®Ö´²Ö¸ü ÛúÖê ”ûÖ¡Ö ˆ¢Ö¸ü-¯Öã×ßÖÛúÖ Ûêú ´ÖãÜÖ-¯Öéšü ¯Ö¸ü ×»ÖÜÖë …  
• Ûéú¯ÖµÖÖ •ÖÖÑ“Ö Ûú¸ü »Öë ×Ûú ‡ÃÖ ¯ÖÏ¿®Ö-¯Ö¡Ö ´Öë 26 ¯ÖÏ¿®Ö Æïü …  
• Ûéú¯ÖµÖÖ ¯ÖÏ¿®Ö ÛúÖ ˆ¢Ö¸ü ×»ÖÜÖ®ÖÖ ¿Öãºþ Ûú¸ü®Öê ÃÖê ¯ÖÆü»Öê, ¯ÖÏ¿®Ö ÛúÖ ÛÎú´ÖÖÓÛú †¾Ö¿µÖ ×»ÖÜÖë …  
• ‡ÃÖ ¯ÖÏ¿®Ö-¯Ö¡Ö ÛúÖê ¯ÖœÌü®Öê Ûêú ×»Ö‹ 15 ×´Ö®Ö™ü ÛúÖ ÃÖ´ÖµÖ ×¤üµÖÖ ÝÖµÖÖ Æîü … ¯ÖÏ¿®Ö-¯Ö¡Ö ÛúÖ ×¾ÖŸÖ¸üÞÖ ¯Öæ¾ÖÖÔÆËü®Ö ´Öë 10.15 ²Ö•Öê 
×ÛúµÖÖ •ÖÖµÖêÝÖÖ … 10.15 ²Ö•Öê ÃÖê 10.30 ²Ö•Öê ŸÖÛú ”ûÖ¡Ö Ûêú¾Ö»Ö ¯ÖÏ¿®Ö-¯Ö¡Ö ÛúÖê ¯ÖœÌëüÝÖê †Öî¸ü ‡ÃÖ †¾Ö×¬Ö Ûêú ¤üÖî¸üÖ®Ö ¾Öê 
ˆ¢Ö¸ü-¯Öã×ßÖÛúÖ ¯Ö¸ü ÛúÖê‡Ô ˆ¢Ö¸ü ®ÖÆüà ×»ÖÜÖëÝÖê …  
• Please check that this question paper contains 8 printed pages. 
• Code number given on the right hand side of the question paper should be written on the 
title page of the answer-book by the candidate. 
• Please check that this question paper contains 26 questions. 
• Please write down the Serial Number of the question before attempting it. 
• 15 minutes 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. 
ÛúÖê›ü ®ÖÓ. 
Code No.  
    
¯Ö¸üßõÖÖ£Öá ÛúÖê›ü ÛúÖê ˆ¢Ö¸ü-¯Öã×ßÖÛúÖ Ûêú ´ÖãÜÖ-¯Öéšü 
¯Ö¸ü †¾Ö¿µÖ ×»ÖÜÖë … 
Candidates must write the Code on 
the title page of the answer-book. 
 
SET – 3 
57/1/3 2  
General Instructions :   
 (i) There are a total of 26 questions and five sections in the question paper.                     
All questions are compulsory. 
 (ii) Section A contains question number 1 to 5, Very Short Answer type questions of 
one mark each. 
 (iii) Section B contains question number 6 to 10, Short Answer type I questions of two 
marks each. 
 (iv) Section C contains question number 11 to 22, Short Answer type II questions of 
three marks each. 
 (v) Section D contains question number 23, Value Based Question of four marks. 
 (vi) Section E contains question number 24 to 26, Long Answer type questions of five 
marks each. 
 (vii) There is no overall choice in the question paper, however, an internal choice is 
provided in one question of two marks, one question of three marks and all three 
questions of five marks. An examinee is to attempt any one of the questions out of 
the two given in the question paper with the same question number.  
 
ÜÖÞ›ü – Ûú 
SECTION – A 
1. ®µÖæ׌»Ö†ÖêÃÖÖê´Ö Ûêú ŠúÞÖÖŸ´ÖÛú ŸÖ£ÖÖ ¬Ö®ÖÖŸ´ÖÛú ºþ¯Ö ÃÖê †Ö¾Öê×¿ÖŸÖ ÃÖÓ‘Ö™üÛúÖë Ûêú ®ÖÖ´Ö ²ÖŸÖÖ‡‹ …  1 
 Name the negatively charged and positively charged components of a nucleosome.  
 
2. ²ÖÖ®ÖìÛú»ÖÖë †Öî¸ü ÆËü¾Öê»Ö Ûêú ²Öß“Ö ¯ÖÖ‹ •ÖÖ®Öê ¾ÖÖ»Öß ¯ÖÖ¸üïÖ׸üÛú ×ÛÎúµÖÖ Ûêú ¯ÖÏÛúÖ¸ü ÛúÖ ®ÖÖ´Ö ²ÖŸÖÖ‡‹ …  1 
 Name the type of interaction that exists between barnacles and whale.  
 
3.
                          
 µÖÆüÖÑ ×¤ü‹ ÝÖ‹ ¤üÖê ד֡ÖÖë ´Öë ¯Öî¯Öê¾Ö¸ü (A) †Öî¸ü ´ÖÖ‡Ûêú×»ÖµÖÖ (B) Ûêú ¯Öã¯ÖÖë Ûêú •ÖÖµÖÖÓÝÖ (áÖßÛêúÃÖ¸ü) ¤ü¿ÖÖÔ‹ ÝÖ‹ Æïü … ‡®ÖÛêú 
†Ó›üÖ¿ÖµÖÖë Ûúß ÃÖÓ¸ü“Ö®ÖÖ ´Öë †ÓŸÖ¸ü ²ÖŸÖÖ‡‹ …  1 
57/1/3 3 [P.T.O. 
                           
 These pictures show the gynaeceum of (A) Papaver and (B) Michellia flowers. Write 
the difference in the structure of their ovaries. 
 
4. ²ÖŸÖÖ‡‹ ×Ûú ÃÖÖ‡™üÖêÛúÖ‡®Ö †¾Ö¸üÖê¬Ö ×ÛúÃÖ ¯ÖÏÛúÖ¸ü ¾ÖÖµÖ¸üÃÖß ÃÖÓÛÎú´ÖÞÖ ÃÖê ²Ö“ÖÖ¾Ö Ûú¸üŸÖê Æïü …  1 
 How do cytokine barriers help in evading viral injections ? 
 
5.  ™ü®ÖÔ¸ü ØÃÖ›ÒüÖê´Ö Ûêú ÛÎúÖê´ÖÖêÃÖÖê´ÖßµÖ ×¾ÖÛúÖ¸ü ŒµÖÖ Æïü ? ²ÖŸÖÖ‡‹ …   1 
 State the chromosomal defect in individuals with Turner’s syndrome. 
 
ÜÖÞ›ü – ÜÖ 
SECTION – B 
6.  E-coRI ŒµÖÖ Æîü ? ²ÖŸÖÖ‡‹ ×Ûú EcoRI ×ÛúÃÖ ¯ÖÏÛúÖ¸ü ‹ŒÃÖÖꮵÖæ׌»Ö‹•ÖÌ ÃÖê ׳֮®Ö ÆüÖêŸÖÖ Æîü … 2 
 What is EcoRI ? How does EcoRI differ from an exonuclease ?  
 
7.  ‹Ûú ×®Ö:ÃÖÓŸÖÖ®Ö ¤ü´¯Ö×ŸÖ ‘™êüÙü ™ËüµÖæ²Ö ²Öê²Öß’ ¯ÖÏÖêÝÖÏÖ´Ö Ûêú ×»Ö‹ ¸üÖ•ÖÌß ÆüÖê ÝÖ‹ Æïü … ÝÖ³ÖÔ¬ÖÖ¸üÞÖ Ûú¸ü®Öê Ûêú ×»Ö‹ ‡ÃÖ ¯Ö¨ü×ŸÖ ´Öë 
†¯Ö®ÖÖ‹ •ÖÖ®Öê ¾ÖÖ»Öê ´Öæ»Ö³ÖæŸÖ “Ö¸üÞÖÖë Ûúß ÃÖæ“Öß ²Ö®ÖÖ‡‹ …  
†£Ö¾ÖÖ 
 Ûêú»Öê ÛúÖê †×®ÖÂÖêÛú±ú»Ö®Öß ±ú»Ö ÛúÆüÖ •ÖÖŸÖÖ Æîü, •Ö²Ö×Ûú ™üÛúá ÛúÖê †×®ÖÂÖêÛú•Ö®Ö®Öß ÛúÆüÖ •ÖÖŸÖÖ Æîü … ŒµÖÖë ? 2 
 A childless couple has agreed for a test tube baby programme. List only the basic steps 
the procedure would involve to conceive the baby. 
OR 
 Banana fruit is said to be parthenocarpic where as turkey is said to be parthenogenetic. 
Why ?  
 
8. šÓü›êü õÖê¡ÖÖë ´Öë ¯ÖÖ‹ •ÖÖ®Öê ¾ÖÖ»Öê ß֮֬ÖÖ¸üß †Öî¸ü ¬ÖÐã¾ÖßµÖ õÖê¡ÖÖë ´Öë ¯ÖÖ‹ •ÖÖ®Öê ¾ÖÖ»Öê ¬ÖÐã¾ÖßµÖ ÃÖᯙ †¯Ö®Öê ¿Ö¸ü߸ü Ûúß ‰ú´ÖÖ Ûêú 
ÈüÖÃÖ ÛúÖê ×ÛúÃÖ ¯ÖÏÛúÖ¸ü Ûú´Ö Ûú¸üŸÖê Æïü ? 2 
 How do mammals living in colder regions and seals living in polar regions able to 
reduce the loss of their body heat ? 
Page 4


57/1/3 1 [P.T.O. 
 
 
 
 
¸üÖê»Ö ®ÖÓ. 
Roll No.  
 
 
 
•Öß¾Ö ×¾Ö–ÖÖ®Ö (ÃÖî¨üÖ×®ŸÖÛú) 
BIOLOGY (Theory)  
×®Ö¬ÖÖÔ׸üŸÖ ÃÖ´ÖµÖ  :    3 ‘ÖÓ™êü ] [ †×¬ÖÛúŸÖ´Ö †ÓÛú  : 70 
Time allowed : 3 hours ] [ Maximum Marks : 70 
 
ÃÖÖ´ÖÖ®µÖ ×®Ö¤ìü¿Ö    : : : :   
    (i) ¯ÖÏ¿®Ö-¯Ö¡Ö ´Öë ¯ÖÖÑ“Ö ÜÖÞ›üÖë ´Öë 26 ¯ÖÏ¿®Ö פü‹ ÝÖ‹ Æïü … ÃÖ³Öß ¯ÖÏ¿®Ö †×®Ö¾ÖÖµÖÔ Æïü … 
 (ii) ÜÖÞ›ü – Ûú ´Öë ¯ÖÏ¿®Ö ÃÖÓܵÖÖ 1 ÃÖê 5 †×ŸÖ »Ö‘Öã¢Ö¸ü ¯ÖÏ¿®Ö Æïü … ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö ‹Ûú †ÓÛú ÛúÖ Æîü …  
 (iii) ÜÖÞ›ü – ÜÖ ´Öë ¯ÖÏ¿®Ö ÃÖÓܵÖÖ 6 ÃÖê 10 »Ö‘Öã¢Ö¸ü ¯ÖÏ¿®Ö I ¯ÖÏÛúÖ¸ü Ûêú Æïü … ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö ¤üÖê †ÓÛú ÛúÖ Æîü …  
 (iv) ÜÖÞ›ü – ÝÖ ´Öë ¯ÖÏ¿®Ö ÃÖÓܵÖÖ 11 ÃÖê 22 »Ö‘Öã¢Ö¸ü ¯ÖÏ¿®Ö II ¯ÖÏÛúÖ¸ü Ûêú Æïü … ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö ŸÖß®Ö †ÓÛú ÛúÖ Æîüü …  
 (v) ÜÖÞ›ü – ‘Ö ´Öë ¯ÖÏ¿®Ö ÃÖÓܵÖÖ 23 ´Ö滵ÖÖ¬ÖÖ׸üŸÖ ¯ÖÏ¿®Ö “ÖÖ¸ü †ÓÛúÖë ÛúÖ Æîü …  
 (vi) ÜÖÞ›ü – ’û  ´Öë ¯ÖÏ¿®Ö ÃÖÓܵÖÖ 24 ÃÖê 26 ¤üß‘ÖÔ ˆ¢Ö¸ü ¯ÖÏ¿®Ö Æïü, ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö ¯ÖÖÑ“Ö †ÓÛú ÛúÖ Æîü …  
 (vii) ¯ÖÏ¿®Ö-¯Ö¡Ö ´Öë ÛúÖê‡Ô ÃÖ´ÖÝÖÏ ¯Ö¸ü ×¾ÖÛú»¯Ö ®ÖÆüà Æîü, ×±ú¸ü ³Öß ¤üÖê †ÓÛú Ûêú ‹Ûú ¯ÖÏ¿®Ö, ŸÖß®Ö †ÓÛú Ûêú ‹Ûú ¯ÖÏ¿®Ö †Öî¸ü 
¯ÖÖÑ“Ö †ÓÛúÖë Ûêú ŸÖß®Ö ¯ÖÏ¿®ÖÖë Ûêú ³Öߟָüß ×¾ÖÛú»¯Ö פü‹ ÝÖ‹ Æïü … ¯ÖÏŸµÖêÛú ¯Ö¸üßõÖÖ£Öá ÛúÖê ‹êÃÖê ¯ÖÏ¿®ÖÖë Ûêú ¤üÖê ×¾ÖÛú»¯ÖÖë ´Öë 
ÃÖê ‹Ûú ¯ÖÏ¿®Ö Æü»Ö Ûú¸ü®ÖÖ Æîü …  
 Series : SSO/1/C 
57/1/3
• Ûéú¯ÖµÖÖ •ÖÖÑ“Ö Ûú¸ü »Öë ×Ûú ‡ÃÖ ¯ÖÏ¿®Ö-¯Ö¡Ö ´Öë ´ÖãצüŸÖ ¯Öéšü 8 Æïü … 
• ¯ÖÏ¿®Ö-¯Ö¡Ö ´Öë ¤üÖ×Æü®Öê ÆüÖ£Ö Ûúß †Öê¸ü פü‹ ÝÖ‹ ÛúÖê›ü ®Ö´²Ö¸ü ÛúÖê ”ûÖ¡Ö ˆ¢Ö¸ü-¯Öã×ßÖÛúÖ Ûêú ´ÖãÜÖ-¯Öéšü ¯Ö¸ü ×»ÖÜÖë …  
• Ûéú¯ÖµÖÖ •ÖÖÑ“Ö Ûú¸ü »Öë ×Ûú ‡ÃÖ ¯ÖÏ¿®Ö-¯Ö¡Ö ´Öë 26 ¯ÖÏ¿®Ö Æïü …  
• Ûéú¯ÖµÖÖ ¯ÖÏ¿®Ö ÛúÖ ˆ¢Ö¸ü ×»ÖÜÖ®ÖÖ ¿Öãºþ Ûú¸ü®Öê ÃÖê ¯ÖÆü»Öê, ¯ÖÏ¿®Ö ÛúÖ ÛÎú´ÖÖÓÛú †¾Ö¿µÖ ×»ÖÜÖë …  
• ‡ÃÖ ¯ÖÏ¿®Ö-¯Ö¡Ö ÛúÖê ¯ÖœÌü®Öê Ûêú ×»Ö‹ 15 ×´Ö®Ö™ü ÛúÖ ÃÖ´ÖµÖ ×¤üµÖÖ ÝÖµÖÖ Æîü … ¯ÖÏ¿®Ö-¯Ö¡Ö ÛúÖ ×¾ÖŸÖ¸üÞÖ ¯Öæ¾ÖÖÔÆËü®Ö ´Öë 10.15 ²Ö•Öê 
×ÛúµÖÖ •ÖÖµÖêÝÖÖ … 10.15 ²Ö•Öê ÃÖê 10.30 ²Ö•Öê ŸÖÛú ”ûÖ¡Ö Ûêú¾Ö»Ö ¯ÖÏ¿®Ö-¯Ö¡Ö ÛúÖê ¯ÖœÌëüÝÖê †Öî¸ü ‡ÃÖ †¾Ö×¬Ö Ûêú ¤üÖî¸üÖ®Ö ¾Öê 
ˆ¢Ö¸ü-¯Öã×ßÖÛúÖ ¯Ö¸ü ÛúÖê‡Ô ˆ¢Ö¸ü ®ÖÆüà ×»ÖÜÖëÝÖê …  
• Please check that this question paper contains 8 printed pages. 
• Code number given on the right hand side of the question paper should be written on the 
title page of the answer-book by the candidate. 
• Please check that this question paper contains 26 questions. 
• Please write down the Serial Number of the question before attempting it. 
• 15 minutes 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. 
ÛúÖê›ü ®ÖÓ. 
Code No.  
    
¯Ö¸üßõÖÖ£Öá ÛúÖê›ü ÛúÖê ˆ¢Ö¸ü-¯Öã×ßÖÛúÖ Ûêú ´ÖãÜÖ-¯Öéšü 
¯Ö¸ü †¾Ö¿µÖ ×»ÖÜÖë … 
Candidates must write the Code on 
the title page of the answer-book. 
 
SET – 3 
57/1/3 2  
General Instructions :   
 (i) There are a total of 26 questions and five sections in the question paper.                     
All questions are compulsory. 
 (ii) Section A contains question number 1 to 5, Very Short Answer type questions of 
one mark each. 
 (iii) Section B contains question number 6 to 10, Short Answer type I questions of two 
marks each. 
 (iv) Section C contains question number 11 to 22, Short Answer type II questions of 
three marks each. 
 (v) Section D contains question number 23, Value Based Question of four marks. 
 (vi) Section E contains question number 24 to 26, Long Answer type questions of five 
marks each. 
 (vii) There is no overall choice in the question paper, however, an internal choice is 
provided in one question of two marks, one question of three marks and all three 
questions of five marks. An examinee is to attempt any one of the questions out of 
the two given in the question paper with the same question number.  
 
ÜÖÞ›ü – Ûú 
SECTION – A 
1. ®µÖæ׌»Ö†ÖêÃÖÖê´Ö Ûêú ŠúÞÖÖŸ´ÖÛú ŸÖ£ÖÖ ¬Ö®ÖÖŸ´ÖÛú ºþ¯Ö ÃÖê †Ö¾Öê×¿ÖŸÖ ÃÖÓ‘Ö™üÛúÖë Ûêú ®ÖÖ´Ö ²ÖŸÖÖ‡‹ …  1 
 Name the negatively charged and positively charged components of a nucleosome.  
 
2. ²ÖÖ®ÖìÛú»ÖÖë †Öî¸ü ÆËü¾Öê»Ö Ûêú ²Öß“Ö ¯ÖÖ‹ •ÖÖ®Öê ¾ÖÖ»Öß ¯ÖÖ¸üïÖ׸üÛú ×ÛÎúµÖÖ Ûêú ¯ÖÏÛúÖ¸ü ÛúÖ ®ÖÖ´Ö ²ÖŸÖÖ‡‹ …  1 
 Name the type of interaction that exists between barnacles and whale.  
 
3.
                          
 µÖÆüÖÑ ×¤ü‹ ÝÖ‹ ¤üÖê ד֡ÖÖë ´Öë ¯Öî¯Öê¾Ö¸ü (A) †Öî¸ü ´ÖÖ‡Ûêú×»ÖµÖÖ (B) Ûêú ¯Öã¯ÖÖë Ûêú •ÖÖµÖÖÓÝÖ (áÖßÛêúÃÖ¸ü) ¤ü¿ÖÖÔ‹ ÝÖ‹ Æïü … ‡®ÖÛêú 
†Ó›üÖ¿ÖµÖÖë Ûúß ÃÖÓ¸ü“Ö®ÖÖ ´Öë †ÓŸÖ¸ü ²ÖŸÖÖ‡‹ …  1 
57/1/3 3 [P.T.O. 
                           
 These pictures show the gynaeceum of (A) Papaver and (B) Michellia flowers. Write 
the difference in the structure of their ovaries. 
 
4. ²ÖŸÖÖ‡‹ ×Ûú ÃÖÖ‡™üÖêÛúÖ‡®Ö †¾Ö¸üÖê¬Ö ×ÛúÃÖ ¯ÖÏÛúÖ¸ü ¾ÖÖµÖ¸üÃÖß ÃÖÓÛÎú´ÖÞÖ ÃÖê ²Ö“ÖÖ¾Ö Ûú¸üŸÖê Æïü …  1 
 How do cytokine barriers help in evading viral injections ? 
 
5.  ™ü®ÖÔ¸ü ØÃÖ›ÒüÖê´Ö Ûêú ÛÎúÖê´ÖÖêÃÖÖê´ÖßµÖ ×¾ÖÛúÖ¸ü ŒµÖÖ Æïü ? ²ÖŸÖÖ‡‹ …   1 
 State the chromosomal defect in individuals with Turner’s syndrome. 
 
ÜÖÞ›ü – ÜÖ 
SECTION – B 
6.  E-coRI ŒµÖÖ Æîü ? ²ÖŸÖÖ‡‹ ×Ûú EcoRI ×ÛúÃÖ ¯ÖÏÛúÖ¸ü ‹ŒÃÖÖꮵÖæ׌»Ö‹•ÖÌ ÃÖê ׳֮®Ö ÆüÖêŸÖÖ Æîü … 2 
 What is EcoRI ? How does EcoRI differ from an exonuclease ?  
 
7.  ‹Ûú ×®Ö:ÃÖÓŸÖÖ®Ö ¤ü´¯Ö×ŸÖ ‘™êüÙü ™ËüµÖæ²Ö ²Öê²Öß’ ¯ÖÏÖêÝÖÏÖ´Ö Ûêú ×»Ö‹ ¸üÖ•ÖÌß ÆüÖê ÝÖ‹ Æïü … ÝÖ³ÖÔ¬ÖÖ¸üÞÖ Ûú¸ü®Öê Ûêú ×»Ö‹ ‡ÃÖ ¯Ö¨ü×ŸÖ ´Öë 
†¯Ö®ÖÖ‹ •ÖÖ®Öê ¾ÖÖ»Öê ´Öæ»Ö³ÖæŸÖ “Ö¸üÞÖÖë Ûúß ÃÖæ“Öß ²Ö®ÖÖ‡‹ …  
†£Ö¾ÖÖ 
 Ûêú»Öê ÛúÖê †×®ÖÂÖêÛú±ú»Ö®Öß ±ú»Ö ÛúÆüÖ •ÖÖŸÖÖ Æîü, •Ö²Ö×Ûú ™üÛúá ÛúÖê †×®ÖÂÖêÛú•Ö®Ö®Öß ÛúÆüÖ •ÖÖŸÖÖ Æîü … ŒµÖÖë ? 2 
 A childless couple has agreed for a test tube baby programme. List only the basic steps 
the procedure would involve to conceive the baby. 
OR 
 Banana fruit is said to be parthenocarpic where as turkey is said to be parthenogenetic. 
Why ?  
 
8. šÓü›êü õÖê¡ÖÖë ´Öë ¯ÖÖ‹ •ÖÖ®Öê ¾ÖÖ»Öê ß֮֬ÖÖ¸üß †Öî¸ü ¬ÖÐã¾ÖßµÖ õÖê¡ÖÖë ´Öë ¯ÖÖ‹ •ÖÖ®Öê ¾ÖÖ»Öê ¬ÖÐã¾ÖßµÖ ÃÖᯙ †¯Ö®Öê ¿Ö¸ü߸ü Ûúß ‰ú´ÖÖ Ûêú 
ÈüÖÃÖ ÛúÖê ×ÛúÃÖ ¯ÖÏÛúÖ¸ü Ûú´Ö Ûú¸üŸÖê Æïü ? 2 
 How do mammals living in colder regions and seals living in polar regions able to 
reduce the loss of their body heat ? 
57/1/3 4  
9.
                    
 (a) †Öê•ÖÌÖê®Ö Ûêú ×®Ö´®ÖßÛú¸üÞÖ Ûêú ¯Ö¿“ÖÖŸÖË ÆüÖê®Öê ¾ÖÖ»Öê ¤ãü¯ÖϳÖÖ¾Ö ŒµÖÖ Æïü ? 
 (b) ‡ÃÖÃÖê ´ÖÖ®Ö¾Ö Ã¾ÖÖãµÖ ¯Ö¸ü ŒµÖÖ ¯ÖϳÖÖ¾Ö ¯Ö›ÌüŸÖÖ Æîü ? 2 
             
 (a) What are the after effects of the degradation of ozone ? 
 (b) How does it affect human health ?   
  
10. “ÖÖÓÃÖ (chance) ˆŸ¯Ö׸ü¾ÖŸÖÔ®Ö ŒµÖÖ ÆüÖêŸÖÖ Æîü ? DDT Ûêú †®Öã¯ÖϵÖÖêÝÖ ÛúÖ ‹Ûú ˆ¤üÖÆü¸üÞÖ Ûêú ºþ¯Ö ´Öë ‡ÃŸÖê´ÖÖ»Ö Ûú¸üŸÖê Æãü‹ 
‡ÃÖ ¯Ö׸ü‘Ö™ü®ÖÖ Ûúß ¾µÖÖܵÖÖ Ûúßו֋ … 2 
 What is chance mutation ? Explain this phenomenon using application of DDT as an 
example. 
ÜÖÞ›ü – ÝÖ 
SECTION – C 
11.  ²ÖŸÖÖ‡‹ ×Ûú HIV Ûêú ÛúÖ¸üÞÖ AIDS Ûêú ¯Öß×›ÌüŸÖ ¾µÖ׌ŸÖ ÛúÖ ¯ÖÏןָüõÖÖ-ŸÖÓ¡Ö ×ÛúÃÖ ¯ÖÏÛúÖ¸ü ³ÖÓÝÖ ÆüÖê •ÖÖŸÖÖ Æîü … 3 
 How does the HIV breakdown the immune system of the AIDS patient ? 
 
12. (a) ²ÖŸÖÖ‡‹ ×Ûú ´ÖÖ®Ö¾Ö ¿Ö¸ü߸ü Ûêú ³Öߟָü ˆÃÖ ÃÖ´ÖµÖ ŒµÖÖ ÆüÖêŸÖÖ Æîü •Ö²Ö ´Ö»Öê׸üµÖÖ Ûêú ¯Ö¸ü•Öß¾Öß ÝÖÏÃŸÖ »ÖÖ»Ö ¹ý׬ָü 
ÛúÖê׿ÖÛúÖ†Öë ÛúÖê ±úÖê›Ìü ¤êüŸÖê Æïü †Öî¸ü ¯Ö¸ü•Öß¾Öß ÛúÖê ¹ý׬ָü ´Öë ”ûÖê›Ìü ¤êüŸÖê Æïü …  
 (b) ¯Ö¸ü¯ÖÖêÂÖß Ûêú ¿Ö¸ü߸ü Ûêú ³Öߟָü ˆ®Ö ×¾Ö׿Ö™ü ãֻÖÖë Ûúß “Ö“ÖÖÔ Ûúßו֋ •ÖÆüÖÑ ´Ö»Öê׸üµÖÖ ¯Ö¸ü•Öß¾Öß Ûêú •Öß¾Ö®Ö-“ÖÛÎú Ûêú 
¤üÖî¸üÖ®Ö : 
  (i) ïÖÖê¸üÖê•ÖÌÖê†Ö‡™ü †Öî¸ü  
  (ii) ÝÖî´Öß™üÖêÃÖÖ‡™ü ˆŸ¯Ö®®Ö ÆüÖêŸÖê Æïü …  3 
 (a) State what happens in the human body when malarial parasites infected RBCs 
burst to release the parasites in the blood. 
 (b) Mention the specific sites in the host body where production of  
  (i) sporozoites and  
  (ii) gemetocytes take place in the life cycle of the malarial parasites.  
Page 5


57/1/3 1 [P.T.O. 
 
 
 
 
¸üÖê»Ö ®ÖÓ. 
Roll No.  
 
 
 
•Öß¾Ö ×¾Ö–ÖÖ®Ö (ÃÖî¨üÖ×®ŸÖÛú) 
BIOLOGY (Theory)  
×®Ö¬ÖÖÔ׸üŸÖ ÃÖ´ÖµÖ  :    3 ‘ÖÓ™êü ] [ †×¬ÖÛúŸÖ´Ö †ÓÛú  : 70 
Time allowed : 3 hours ] [ Maximum Marks : 70 
 
ÃÖÖ´ÖÖ®µÖ ×®Ö¤ìü¿Ö    : : : :   
    (i) ¯ÖÏ¿®Ö-¯Ö¡Ö ´Öë ¯ÖÖÑ“Ö ÜÖÞ›üÖë ´Öë 26 ¯ÖÏ¿®Ö פü‹ ÝÖ‹ Æïü … ÃÖ³Öß ¯ÖÏ¿®Ö †×®Ö¾ÖÖµÖÔ Æïü … 
 (ii) ÜÖÞ›ü – Ûú ´Öë ¯ÖÏ¿®Ö ÃÖÓܵÖÖ 1 ÃÖê 5 †×ŸÖ »Ö‘Öã¢Ö¸ü ¯ÖÏ¿®Ö Æïü … ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö ‹Ûú †ÓÛú ÛúÖ Æîü …  
 (iii) ÜÖÞ›ü – ÜÖ ´Öë ¯ÖÏ¿®Ö ÃÖÓܵÖÖ 6 ÃÖê 10 »Ö‘Öã¢Ö¸ü ¯ÖÏ¿®Ö I ¯ÖÏÛúÖ¸ü Ûêú Æïü … ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö ¤üÖê †ÓÛú ÛúÖ Æîü …  
 (iv) ÜÖÞ›ü – ÝÖ ´Öë ¯ÖÏ¿®Ö ÃÖÓܵÖÖ 11 ÃÖê 22 »Ö‘Öã¢Ö¸ü ¯ÖÏ¿®Ö II ¯ÖÏÛúÖ¸ü Ûêú Æïü … ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö ŸÖß®Ö †ÓÛú ÛúÖ Æîüü …  
 (v) ÜÖÞ›ü – ‘Ö ´Öë ¯ÖÏ¿®Ö ÃÖÓܵÖÖ 23 ´Ö滵ÖÖ¬ÖÖ׸üŸÖ ¯ÖÏ¿®Ö “ÖÖ¸ü †ÓÛúÖë ÛúÖ Æîü …  
 (vi) ÜÖÞ›ü – ’û  ´Öë ¯ÖÏ¿®Ö ÃÖÓܵÖÖ 24 ÃÖê 26 ¤üß‘ÖÔ ˆ¢Ö¸ü ¯ÖÏ¿®Ö Æïü, ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö ¯ÖÖÑ“Ö †ÓÛú ÛúÖ Æîü …  
 (vii) ¯ÖÏ¿®Ö-¯Ö¡Ö ´Öë ÛúÖê‡Ô ÃÖ´ÖÝÖÏ ¯Ö¸ü ×¾ÖÛú»¯Ö ®ÖÆüà Æîü, ×±ú¸ü ³Öß ¤üÖê †ÓÛú Ûêú ‹Ûú ¯ÖÏ¿®Ö, ŸÖß®Ö †ÓÛú Ûêú ‹Ûú ¯ÖÏ¿®Ö †Öî¸ü 
¯ÖÖÑ“Ö †ÓÛúÖë Ûêú ŸÖß®Ö ¯ÖÏ¿®ÖÖë Ûêú ³Öߟָüß ×¾ÖÛú»¯Ö פü‹ ÝÖ‹ Æïü … ¯ÖÏŸµÖêÛú ¯Ö¸üßõÖÖ£Öá ÛúÖê ‹êÃÖê ¯ÖÏ¿®ÖÖë Ûêú ¤üÖê ×¾ÖÛú»¯ÖÖë ´Öë 
ÃÖê ‹Ûú ¯ÖÏ¿®Ö Æü»Ö Ûú¸ü®ÖÖ Æîü …  
 Series : SSO/1/C 
57/1/3
• Ûéú¯ÖµÖÖ •ÖÖÑ“Ö Ûú¸ü »Öë ×Ûú ‡ÃÖ ¯ÖÏ¿®Ö-¯Ö¡Ö ´Öë ´ÖãצüŸÖ ¯Öéšü 8 Æïü … 
• ¯ÖÏ¿®Ö-¯Ö¡Ö ´Öë ¤üÖ×Æü®Öê ÆüÖ£Ö Ûúß †Öê¸ü פü‹ ÝÖ‹ ÛúÖê›ü ®Ö´²Ö¸ü ÛúÖê ”ûÖ¡Ö ˆ¢Ö¸ü-¯Öã×ßÖÛúÖ Ûêú ´ÖãÜÖ-¯Öéšü ¯Ö¸ü ×»ÖÜÖë …  
• Ûéú¯ÖµÖÖ •ÖÖÑ“Ö Ûú¸ü »Öë ×Ûú ‡ÃÖ ¯ÖÏ¿®Ö-¯Ö¡Ö ´Öë 26 ¯ÖÏ¿®Ö Æïü …  
• Ûéú¯ÖµÖÖ ¯ÖÏ¿®Ö ÛúÖ ˆ¢Ö¸ü ×»ÖÜÖ®ÖÖ ¿Öãºþ Ûú¸ü®Öê ÃÖê ¯ÖÆü»Öê, ¯ÖÏ¿®Ö ÛúÖ ÛÎú´ÖÖÓÛú †¾Ö¿µÖ ×»ÖÜÖë …  
• ‡ÃÖ ¯ÖÏ¿®Ö-¯Ö¡Ö ÛúÖê ¯ÖœÌü®Öê Ûêú ×»Ö‹ 15 ×´Ö®Ö™ü ÛúÖ ÃÖ´ÖµÖ ×¤üµÖÖ ÝÖµÖÖ Æîü … ¯ÖÏ¿®Ö-¯Ö¡Ö ÛúÖ ×¾ÖŸÖ¸üÞÖ ¯Öæ¾ÖÖÔÆËü®Ö ´Öë 10.15 ²Ö•Öê 
×ÛúµÖÖ •ÖÖµÖêÝÖÖ … 10.15 ²Ö•Öê ÃÖê 10.30 ²Ö•Öê ŸÖÛú ”ûÖ¡Ö Ûêú¾Ö»Ö ¯ÖÏ¿®Ö-¯Ö¡Ö ÛúÖê ¯ÖœÌëüÝÖê †Öî¸ü ‡ÃÖ †¾Ö×¬Ö Ûêú ¤üÖî¸üÖ®Ö ¾Öê 
ˆ¢Ö¸ü-¯Öã×ßÖÛúÖ ¯Ö¸ü ÛúÖê‡Ô ˆ¢Ö¸ü ®ÖÆüà ×»ÖÜÖëÝÖê …  
• Please check that this question paper contains 8 printed pages. 
• Code number given on the right hand side of the question paper should be written on the 
title page of the answer-book by the candidate. 
• Please check that this question paper contains 26 questions. 
• Please write down the Serial Number of the question before attempting it. 
• 15 minutes 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. 
ÛúÖê›ü ®ÖÓ. 
Code No.  
    
¯Ö¸üßõÖÖ£Öá ÛúÖê›ü ÛúÖê ˆ¢Ö¸ü-¯Öã×ßÖÛúÖ Ûêú ´ÖãÜÖ-¯Öéšü 
¯Ö¸ü †¾Ö¿µÖ ×»ÖÜÖë … 
Candidates must write the Code on 
the title page of the answer-book. 
 
SET – 3 
57/1/3 2  
General Instructions :   
 (i) There are a total of 26 questions and five sections in the question paper.                     
All questions are compulsory. 
 (ii) Section A contains question number 1 to 5, Very Short Answer type questions of 
one mark each. 
 (iii) Section B contains question number 6 to 10, Short Answer type I questions of two 
marks each. 
 (iv) Section C contains question number 11 to 22, Short Answer type II questions of 
three marks each. 
 (v) Section D contains question number 23, Value Based Question of four marks. 
 (vi) Section E contains question number 24 to 26, Long Answer type questions of five 
marks each. 
 (vii) There is no overall choice in the question paper, however, an internal choice is 
provided in one question of two marks, one question of three marks and all three 
questions of five marks. An examinee is to attempt any one of the questions out of 
the two given in the question paper with the same question number.  
 
ÜÖÞ›ü – Ûú 
SECTION – A 
1. ®µÖæ׌»Ö†ÖêÃÖÖê´Ö Ûêú ŠúÞÖÖŸ´ÖÛú ŸÖ£ÖÖ ¬Ö®ÖÖŸ´ÖÛú ºþ¯Ö ÃÖê †Ö¾Öê×¿ÖŸÖ ÃÖÓ‘Ö™üÛúÖë Ûêú ®ÖÖ´Ö ²ÖŸÖÖ‡‹ …  1 
 Name the negatively charged and positively charged components of a nucleosome.  
 
2. ²ÖÖ®ÖìÛú»ÖÖë †Öî¸ü ÆËü¾Öê»Ö Ûêú ²Öß“Ö ¯ÖÖ‹ •ÖÖ®Öê ¾ÖÖ»Öß ¯ÖÖ¸üïÖ׸üÛú ×ÛÎúµÖÖ Ûêú ¯ÖÏÛúÖ¸ü ÛúÖ ®ÖÖ´Ö ²ÖŸÖÖ‡‹ …  1 
 Name the type of interaction that exists between barnacles and whale.  
 
3.
                          
 µÖÆüÖÑ ×¤ü‹ ÝÖ‹ ¤üÖê ד֡ÖÖë ´Öë ¯Öî¯Öê¾Ö¸ü (A) †Öî¸ü ´ÖÖ‡Ûêú×»ÖµÖÖ (B) Ûêú ¯Öã¯ÖÖë Ûêú •ÖÖµÖÖÓÝÖ (áÖßÛêúÃÖ¸ü) ¤ü¿ÖÖÔ‹ ÝÖ‹ Æïü … ‡®ÖÛêú 
†Ó›üÖ¿ÖµÖÖë Ûúß ÃÖÓ¸ü“Ö®ÖÖ ´Öë †ÓŸÖ¸ü ²ÖŸÖÖ‡‹ …  1 
57/1/3 3 [P.T.O. 
                           
 These pictures show the gynaeceum of (A) Papaver and (B) Michellia flowers. Write 
the difference in the structure of their ovaries. 
 
4. ²ÖŸÖÖ‡‹ ×Ûú ÃÖÖ‡™üÖêÛúÖ‡®Ö †¾Ö¸üÖê¬Ö ×ÛúÃÖ ¯ÖÏÛúÖ¸ü ¾ÖÖµÖ¸üÃÖß ÃÖÓÛÎú´ÖÞÖ ÃÖê ²Ö“ÖÖ¾Ö Ûú¸üŸÖê Æïü …  1 
 How do cytokine barriers help in evading viral injections ? 
 
5.  ™ü®ÖÔ¸ü ØÃÖ›ÒüÖê´Ö Ûêú ÛÎúÖê´ÖÖêÃÖÖê´ÖßµÖ ×¾ÖÛúÖ¸ü ŒµÖÖ Æïü ? ²ÖŸÖÖ‡‹ …   1 
 State the chromosomal defect in individuals with Turner’s syndrome. 
 
ÜÖÞ›ü – ÜÖ 
SECTION – B 
6.  E-coRI ŒµÖÖ Æîü ? ²ÖŸÖÖ‡‹ ×Ûú EcoRI ×ÛúÃÖ ¯ÖÏÛúÖ¸ü ‹ŒÃÖÖꮵÖæ׌»Ö‹•ÖÌ ÃÖê ׳֮®Ö ÆüÖêŸÖÖ Æîü … 2 
 What is EcoRI ? How does EcoRI differ from an exonuclease ?  
 
7.  ‹Ûú ×®Ö:ÃÖÓŸÖÖ®Ö ¤ü´¯Ö×ŸÖ ‘™êüÙü ™ËüµÖæ²Ö ²Öê²Öß’ ¯ÖÏÖêÝÖÏÖ´Ö Ûêú ×»Ö‹ ¸üÖ•ÖÌß ÆüÖê ÝÖ‹ Æïü … ÝÖ³ÖÔ¬ÖÖ¸üÞÖ Ûú¸ü®Öê Ûêú ×»Ö‹ ‡ÃÖ ¯Ö¨ü×ŸÖ ´Öë 
†¯Ö®ÖÖ‹ •ÖÖ®Öê ¾ÖÖ»Öê ´Öæ»Ö³ÖæŸÖ “Ö¸üÞÖÖë Ûúß ÃÖæ“Öß ²Ö®ÖÖ‡‹ …  
†£Ö¾ÖÖ 
 Ûêú»Öê ÛúÖê †×®ÖÂÖêÛú±ú»Ö®Öß ±ú»Ö ÛúÆüÖ •ÖÖŸÖÖ Æîü, •Ö²Ö×Ûú ™üÛúá ÛúÖê †×®ÖÂÖêÛú•Ö®Ö®Öß ÛúÆüÖ •ÖÖŸÖÖ Æîü … ŒµÖÖë ? 2 
 A childless couple has agreed for a test tube baby programme. List only the basic steps 
the procedure would involve to conceive the baby. 
OR 
 Banana fruit is said to be parthenocarpic where as turkey is said to be parthenogenetic. 
Why ?  
 
8. šÓü›êü õÖê¡ÖÖë ´Öë ¯ÖÖ‹ •ÖÖ®Öê ¾ÖÖ»Öê ß֮֬ÖÖ¸üß †Öî¸ü ¬ÖÐã¾ÖßµÖ õÖê¡ÖÖë ´Öë ¯ÖÖ‹ •ÖÖ®Öê ¾ÖÖ»Öê ¬ÖÐã¾ÖßµÖ ÃÖᯙ †¯Ö®Öê ¿Ö¸ü߸ü Ûúß ‰ú´ÖÖ Ûêú 
ÈüÖÃÖ ÛúÖê ×ÛúÃÖ ¯ÖÏÛúÖ¸ü Ûú´Ö Ûú¸üŸÖê Æïü ? 2 
 How do mammals living in colder regions and seals living in polar regions able to 
reduce the loss of their body heat ? 
57/1/3 4  
9.
                    
 (a) †Öê•ÖÌÖê®Ö Ûêú ×®Ö´®ÖßÛú¸üÞÖ Ûêú ¯Ö¿“ÖÖŸÖË ÆüÖê®Öê ¾ÖÖ»Öê ¤ãü¯ÖϳÖÖ¾Ö ŒµÖÖ Æïü ? 
 (b) ‡ÃÖÃÖê ´ÖÖ®Ö¾Ö Ã¾ÖÖãµÖ ¯Ö¸ü ŒµÖÖ ¯ÖϳÖÖ¾Ö ¯Ö›ÌüŸÖÖ Æîü ? 2 
             
 (a) What are the after effects of the degradation of ozone ? 
 (b) How does it affect human health ?   
  
10. “ÖÖÓÃÖ (chance) ˆŸ¯Ö׸ü¾ÖŸÖÔ®Ö ŒµÖÖ ÆüÖêŸÖÖ Æîü ? DDT Ûêú †®Öã¯ÖϵÖÖêÝÖ ÛúÖ ‹Ûú ˆ¤üÖÆü¸üÞÖ Ûêú ºþ¯Ö ´Öë ‡ÃŸÖê´ÖÖ»Ö Ûú¸üŸÖê Æãü‹ 
‡ÃÖ ¯Ö׸ü‘Ö™ü®ÖÖ Ûúß ¾µÖÖܵÖÖ Ûúßו֋ … 2 
 What is chance mutation ? Explain this phenomenon using application of DDT as an 
example. 
ÜÖÞ›ü – ÝÖ 
SECTION – C 
11.  ²ÖŸÖÖ‡‹ ×Ûú HIV Ûêú ÛúÖ¸üÞÖ AIDS Ûêú ¯Öß×›ÌüŸÖ ¾µÖ׌ŸÖ ÛúÖ ¯ÖÏןָüõÖÖ-ŸÖÓ¡Ö ×ÛúÃÖ ¯ÖÏÛúÖ¸ü ³ÖÓÝÖ ÆüÖê •ÖÖŸÖÖ Æîü … 3 
 How does the HIV breakdown the immune system of the AIDS patient ? 
 
12. (a) ²ÖŸÖÖ‡‹ ×Ûú ´ÖÖ®Ö¾Ö ¿Ö¸ü߸ü Ûêú ³Öߟָü ˆÃÖ ÃÖ´ÖµÖ ŒµÖÖ ÆüÖêŸÖÖ Æîü •Ö²Ö ´Ö»Öê׸üµÖÖ Ûêú ¯Ö¸ü•Öß¾Öß ÝÖÏÃŸÖ »ÖÖ»Ö ¹ý׬ָü 
ÛúÖê׿ÖÛúÖ†Öë ÛúÖê ±úÖê›Ìü ¤êüŸÖê Æïü †Öî¸ü ¯Ö¸ü•Öß¾Öß ÛúÖê ¹ý׬ָü ´Öë ”ûÖê›Ìü ¤êüŸÖê Æïü …  
 (b) ¯Ö¸ü¯ÖÖêÂÖß Ûêú ¿Ö¸ü߸ü Ûêú ³Öߟָü ˆ®Ö ×¾Ö׿Ö™ü ãֻÖÖë Ûúß “Ö“ÖÖÔ Ûúßו֋ •ÖÆüÖÑ ´Ö»Öê׸üµÖÖ ¯Ö¸ü•Öß¾Öß Ûêú •Öß¾Ö®Ö-“ÖÛÎú Ûêú 
¤üÖî¸üÖ®Ö : 
  (i) ïÖÖê¸üÖê•ÖÌÖê†Ö‡™ü †Öî¸ü  
  (ii) ÝÖî´Öß™üÖêÃÖÖ‡™ü ˆŸ¯Ö®®Ö ÆüÖêŸÖê Æïü …  3 
 (a) State what happens in the human body when malarial parasites infected RBCs 
burst to release the parasites in the blood. 
 (b) Mention the specific sites in the host body where production of  
  (i) sporozoites and  
  (ii) gemetocytes take place in the life cycle of the malarial parasites.  
57/1/3 5 [P.T.O. 
13.  ´Ö¹ý¤Ëü׳֤Ëü ¯ÖµÖÖÔ¾ÖÖÃÖ ´Öë ÆüÖê®Öê ¾ÖÖ»Öê ˆÃÖ ¯ÖÖ¤ü¯Ö-†®ÖãÛÎú´ÖÞÖ Ûúß ¾µÖÖܵÖÖ Ûúßו֋ •Ö²Ö ŸÖÛú “Ö¸ü´ÖÖêŸÛúÂÖÔ ÃÖ´Öã¤üÖµÖ ŸÖÛú ®ÖÆüà ¯ÖÆãÑü“Ö 
•ÖÖŸÖÖ …     3 
 Explain succession of plants in xerophytic habitat until it reaches climax community. 
 
14. ®Ö¤üß Ûêú •Ö»Ö ´Öë ¾ÖÖ×ÆüŸÖ ´Ö»Ö ÛúÖê ”ûÖê›Ìêü •ÖÖ®Öê Ûêú Ûãú”û ÃÖ¯ŸÖÖÆü ¯Ö¿“ÖÖŸÖË (i) ‘Öã×»ÖŸÖ †ÖòŒÃÖß•Ö®Ö Ûêú ßָü †Öî¸ü         
(ii) †»Ö¾ÖÞÖ •Ö»ÖßµÖ •Öß¾ÖÖë Ûúß ÃÖ´Ö×™ü Ûêú ÃÖÓ¤ü³ÖÔ ´Öë •Ö»Ö ´Öë ÆüÖê®Öê ¾ÖÖ»Öê ¯Ö׸ü¾ÖŸÖÔ®ÖÖë Ûúß ¾µÖÖܵÖÖ Ûúßו֋ …  3 
 Explain the changes that can be observed in the characteristics of river water when 
sewage is discharged into it and a few weeks after the discharge with respect to : 
 (i) level of dissolved oxygen 
 (ii) population of fresh water organisms. 
 
15.  ÝÖ®®Öê Ûúß ‹Ûú ±úÃÖ»Ö ×ÛúÃÖß ¾ÖÖµÖ¸üÃÖ ÃÖê ÃÖÓÛÎú×´ÖŸÖ ÆüÖê ÝÖµÖß Æîü … ‡ÃÖÃÖê ¾ÖÖµÖ¸üÃÖ ´ÖãŒŸÖ ÝÖ®®ÖÖ-±úÃÖ»Ö ×ÛúÃÖ ¯ÖÏÛúÖ¸ü 
×¾ÖÛú×ÃÖŸÖ Ûúß •ÖÖ ÃÖÛúŸÖß Æîü ? ‡ÃÖ ¯ÖÏÞÖÖ»Öß Ûúß ¾µÖÖܵÖÖ Ûúßו֋ …  3 
 A sugarcane has been affected by virus. How can a virus free cane be developed from     
it ? Explain the procedure.  
 
16.  PCR ´Öë Taq ¯ÖÖò»Öß´Ö¸êü•ÖÌ ÛúÖê ŒµÖÖë ¾Ö¸üßµÖŸÖÖ ¤üß •ÖÖŸÖß Æîü ? ‡ÃÖ ‹Ó•ÖÌÖ‡´Ö Ûêú ÄÖÖêŸÖ Ûúß “Ö“ÖÖÔ Ûúßו֋ …   3 
 Why is Taq polymerase preferred in PCR ? Mention the source of this enzyme. 
 
17.  ‡ÓÝ»ÖîÞ›ü ´Öë ¿¾ÖêŸÖ †Öî¸ü ÛúÖ»Öê ¸ÓüÝÖ Ûêú ¿Ö»Ö³ÖÖë Ûêú ¯ÖÏÖÛéúןÖÛú ¾Ö¸üÞÖ ´Öë †ÖîªÖêÝÖßÛú¸üÞÖ Ûúß ŒµÖÖ ³Öæ×´ÖÛúÖ ¸üÆüß ? 3 
                †£Ö¾ÖÖ  
 ×¾ÖÛúÖÃÖ Ûêú ÃÖÓ¤ü³ÖÔ ´Öë ˆ›Ìü®Ö ×ÝÖ»ÖÆü¸üß †Öî¸ü ˆ›Ìü®Ö ±Ìîú»Öָü Ûêú ²Öß“Ö ÃÖ´ÖÖ®ÖŸÖÖ ÛúÖ ŒµÖÖ †£ÖÔ ÃÖ´Ö—ÖŸÖê Æïü ? 
 How did industrialization play a role in Natural Selection of light and dark coloured 
moth in England ?  
OR 
 What do you infer from the resemblance between flying squirrel and flying phalanger 
with reference to their evolution. 
 
18.
            
Y
Z
X
 
 ˆ¯Ö¸üÖêŒŸÖ †Ö¸êüÜÖ ´Öë ´ÖÖ®Ö¾Ö ÛúÖ ®Ö¸ü •Ö®Ö®Ö-ŸÖÓ¡Ö (Ûêú¾Ö»Ö ‹Ûú ŸÖ¸ü±Ìú ÛúÖ) ¤ü¿ÖÖÔµÖÖ ÝÖµÖÖ Æîü … 
 (a) ‘X’ Ûúß ¯ÖÆü“ÖÖ®Ö Ûúßו֋ ŸÖ£ÖÖ ¿Ö¸ü߸ü Ûêú ³Öߟָü ˆÃÖÛúß ×ãÖ×ŸÖ ²ÖŸÖÖ‡‹ …   
 (b) ÃÖÆüÖµÖÛú ÝÖÏÓ×£Ö ‘Y’ ÛúÖ ®ÖÖ´Ö ²ÖŸÖÖ‡‹ ŸÖ£ÖÖ ˆÃÖÛêú ÄÖÖ¾Ö ÛúÖ ®ÖÖ´Ö ³Öß ²ÖŸÖÖ‡‹ …  
 (c) ‘Z’ ÛúÖ ®ÖÖ´Ö ŸÖ£ÖÖ ˆÃÖÛúÖ ÛúÖµÖÔ ²ÖŸÖÖ‡‹ …  3