Past Year Paper, Biology (Set - 3), Foreign, 2016, Class 12, Biology | Additional Study Material for NEET PDF Download

 Page 1


57/2/3 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-ˆ¢Ö¸üßµÖ ¯ÖÏ¿®Ö Æïü … ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö ‹Ûú †ÓÛú ÛúÖ Æîü …  
 (iii) ÜÖÞ›ü – ÜÖ ´Öë ¯ÖÏ¿®Ö ÃÖÓܵÖÖ 6 ÃÖê 10 »Ö‘Öã-ˆ¢Ö¸üßµÖü ¯ÖÏ¿®Ö I ¯ÖÏÛúÖ¸ü Ûêú Æïü, ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö ¤üÖê †ÓÛúÖë ÛúÖ Æîü …  
 (iv) ÜÖÞ›ü – ÝÖ ´Öë ¯ÖÏ¿®Ö ÃÖÓܵÖÖ 11 ÃÖê 22 »Ö‘Öã-ˆ¢Ö¸üßµÖ ¯ÖÏ¿®Ö II ¯ÖÏÛúÖ¸ü Ûêú Æïü, ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö ŸÖß®Ö †ÓÛúÖë ÛúÖ Æîü …  
 (v) ÜÖÞ›ü – ‘Ö ´Öë ¯ÖÏ¿®Ö ÃÖÓܵÖÖ 23 ´Öæ»µÖ †Ö¬ÖÖ׸üŸÖ ¯ÖÏ¿®Ö “ÖÖ¸ü †ÓÛúÖë ÛúÖ Æîü …  
 (vi) ÜÖÞ›ü – ’û  ´Öë ¯ÖÏ¿®Ö ÃÖÓܵÖÖ 24 ÃÖê 26 ¤üß‘ÖÔ-ˆ¢Ö¸üßµÖü ¯ÖÏ¿®Ö Æïü, ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö ¯ÖÖÑ“Ö †ÓÛúÖë ÛúÖ Æîü …  
 (vii) ¯ÖÏ¿®Ö-¯Ö¡Ö ´Öë ÃÖ´ÖÝÖÏ ¯Ö¸ü ÛúÖê‡Ô ×¾ÖÛú»¯Ö ®ÖÆüà Æîü, ×±ú¸ü ³Öß ¤üÖê †ÓÛúÖë ¾ÖÖ»Öê ‹Ûú ¯ÖÏ¿®Ö ´Öë, ŸÖß®Ö †ÓÛúÖë ¾ÖÖ»Öê ‹Ûú 
¯ÖÏ¿®Ö ´Öë †Öî¸ü ¯ÖÖÑ“Ö †ÓÛúÖë ¾ÖÖ»Öê ÃÖ³Öß ŸÖß®ÖÖë ¯ÖÏ¿®ÖÖë ´Öë ³Öߟָüß “ÖµÖ®Ö-×¾ÖÛú»¯Ö פü‹ ÝÖ‹ Æïü … ¯ÖÏŸµÖêÛú ¯Ö¸üßõÖÖ£Öá ÛúÖê 
‹êÃÖê ¯ÖÏ¿®ÖÖë Ûêú ¤üÖê ×¾ÖÛú»¯ÖÖë ´Öë ÃÖê ÛúÖê‡Ô ‹Ûú ¯ÖÏ¿®Ö Æü»Ö Ûú¸ü®ÖÖ Æîü …  
 Series : ONS/2 
57/2/3
• 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 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. 
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


57/2/3 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-ˆ¢Ö¸üßµÖ ¯ÖÏ¿®Ö Æïü … ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö ‹Ûú †ÓÛú ÛúÖ Æîü …  
 (iii) ÜÖÞ›ü – ÜÖ ´Öë ¯ÖÏ¿®Ö ÃÖÓܵÖÖ 6 ÃÖê 10 »Ö‘Öã-ˆ¢Ö¸üßµÖü ¯ÖÏ¿®Ö I ¯ÖÏÛúÖ¸ü Ûêú Æïü, ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö ¤üÖê †ÓÛúÖë ÛúÖ Æîü …  
 (iv) ÜÖÞ›ü – ÝÖ ´Öë ¯ÖÏ¿®Ö ÃÖÓܵÖÖ 11 ÃÖê 22 »Ö‘Öã-ˆ¢Ö¸üßµÖ ¯ÖÏ¿®Ö II ¯ÖÏÛúÖ¸ü Ûêú Æïü, ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö ŸÖß®Ö †ÓÛúÖë ÛúÖ Æîü …  
 (v) ÜÖÞ›ü – ‘Ö ´Öë ¯ÖÏ¿®Ö ÃÖÓܵÖÖ 23 ´Öæ»µÖ †Ö¬ÖÖ׸üŸÖ ¯ÖÏ¿®Ö “ÖÖ¸ü †ÓÛúÖë ÛúÖ Æîü …  
 (vi) ÜÖÞ›ü – ’û  ´Öë ¯ÖÏ¿®Ö ÃÖÓܵÖÖ 24 ÃÖê 26 ¤üß‘ÖÔ-ˆ¢Ö¸üßµÖü ¯ÖÏ¿®Ö Æïü, ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö ¯ÖÖÑ“Ö †ÓÛúÖë ÛúÖ Æîü …  
 (vii) ¯ÖÏ¿®Ö-¯Ö¡Ö ´Öë ÃÖ´ÖÝÖÏ ¯Ö¸ü ÛúÖê‡Ô ×¾ÖÛú»¯Ö ®ÖÆüà Æîü, ×±ú¸ü ³Öß ¤üÖê †ÓÛúÖë ¾ÖÖ»Öê ‹Ûú ¯ÖÏ¿®Ö ´Öë, ŸÖß®Ö †ÓÛúÖë ¾ÖÖ»Öê ‹Ûú 
¯ÖÏ¿®Ö ´Öë †Öî¸ü ¯ÖÖÑ“Ö †ÓÛúÖë ¾ÖÖ»Öê ÃÖ³Öß ŸÖß®ÖÖë ¯ÖÏ¿®ÖÖë ´Öë ³Öߟָüß “ÖµÖ®Ö-×¾ÖÛú»¯Ö פü‹ ÝÖ‹ Æïü … ¯ÖÏŸµÖêÛú ¯Ö¸üßõÖÖ£Öá ÛúÖê 
‹êÃÖê ¯ÖÏ¿®ÖÖë Ûêú ¤üÖê ×¾ÖÛú»¯ÖÖë ´Öë ÃÖê ÛúÖê‡Ô ‹Ûú ¯ÖÏ¿®Ö Æü»Ö Ûú¸ü®ÖÖ Æîü …  
 Series : ONS/2 
57/2/3
• 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 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. 
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 
57/2/3 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 questions number 1 to 5, Very Short Answer type questions of 
one mark each. 
 (iii) Section B contains questions number 6 to 10, Short Answer type-I questions of two 
marks each. 
 (iv) Section C contains questions 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 questions 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. ‹Ûú ÃÖÓפüÝ¬Ö AIDS Ûêú ¸üÖêÝÖß ´Öë HIV ÛúÖ ¯ÖŸÖÖ »ÖÝÖÖ®Öê Ûêú ×»Ö‹ †Ö×Þ¾ÖÛú ®Öî¤üÖ×®ÖÛúú ×ÛÎúµÖÖ×¾Ö×¬Ö ÛúÖ ÃÖã—ÖÖ¾Ö      
¤üßו֋ …   1 
 Suggest a molecular diagnostic procedure that detects HIV in a suspected AIDS patient.  
  
2. ‹Ûú ‹ŒÃÖÖò®Ö ÃÖê ‹Ûú ‡®™ÒüÖò®Ö ´Öë ³Öê¤ü Ûú¸ü®Öê Ûêú ×»Ö‹ ‹Ûú †ÓŸÖ¸ü ²ÖŸÖÖ‡‹ … 1 
 Mention one difference to distinguish an exon from an intron.  
 
3. ×ÛúÃÖß Ã¯Öß¿Öß•ÖÌ Ûêú ×»Ö‹ ¯ÖÏÛéú×ŸÖ Ûúß ¾ÖÆü®Ö õÖ´ÖŸÖÖ ×ÛúÃÖ ²ÖÖŸÖ ÛúÖ ÃÖÓÛêúŸÖ ¤êüŸÖß Æîü ? 1 
 What does nature’s carrying capacity for a species indicate ? 
 
4. †Ö¬ÖÖ¸ü-׿ְ™ü ˆŸ¯Ö׸ü¾ÖŸÖÔ®Ö Ûêú ¤üÖê ÛúÖ¸üÞÖ ²ÖŸÖÖ‡‹ … 1 
 Mention two causes of frame-shift Mutation. 
 
5. ¤üÖê •ÖÓŸÖã†Öë Ûêú ®ÖÖ´Ö ²ÖŸÖÖ‡‹ וִ֮Öë ´Ö¤ü “ÖÛÎú ¯ÖϤüÙ¿ÖŸÖ ÆüÖêŸÖÖ Æîü … 1 
 Name two animals that exhibit Oestrus cycle. 
Page 3


57/2/3 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-ˆ¢Ö¸üßµÖ ¯ÖÏ¿®Ö Æïü … ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö ‹Ûú †ÓÛú ÛúÖ Æîü …  
 (iii) ÜÖÞ›ü – ÜÖ ´Öë ¯ÖÏ¿®Ö ÃÖÓܵÖÖ 6 ÃÖê 10 »Ö‘Öã-ˆ¢Ö¸üßµÖü ¯ÖÏ¿®Ö I ¯ÖÏÛúÖ¸ü Ûêú Æïü, ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö ¤üÖê †ÓÛúÖë ÛúÖ Æîü …  
 (iv) ÜÖÞ›ü – ÝÖ ´Öë ¯ÖÏ¿®Ö ÃÖÓܵÖÖ 11 ÃÖê 22 »Ö‘Öã-ˆ¢Ö¸üßµÖ ¯ÖÏ¿®Ö II ¯ÖÏÛúÖ¸ü Ûêú Æïü, ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö ŸÖß®Ö †ÓÛúÖë ÛúÖ Æîü …  
 (v) ÜÖÞ›ü – ‘Ö ´Öë ¯ÖÏ¿®Ö ÃÖÓܵÖÖ 23 ´Öæ»µÖ †Ö¬ÖÖ׸üŸÖ ¯ÖÏ¿®Ö “ÖÖ¸ü †ÓÛúÖë ÛúÖ Æîü …  
 (vi) ÜÖÞ›ü – ’û  ´Öë ¯ÖÏ¿®Ö ÃÖÓܵÖÖ 24 ÃÖê 26 ¤üß‘ÖÔ-ˆ¢Ö¸üßµÖü ¯ÖÏ¿®Ö Æïü, ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö ¯ÖÖÑ“Ö †ÓÛúÖë ÛúÖ Æîü …  
 (vii) ¯ÖÏ¿®Ö-¯Ö¡Ö ´Öë ÃÖ´ÖÝÖÏ ¯Ö¸ü ÛúÖê‡Ô ×¾ÖÛú»¯Ö ®ÖÆüà Æîü, ×±ú¸ü ³Öß ¤üÖê †ÓÛúÖë ¾ÖÖ»Öê ‹Ûú ¯ÖÏ¿®Ö ´Öë, ŸÖß®Ö †ÓÛúÖë ¾ÖÖ»Öê ‹Ûú 
¯ÖÏ¿®Ö ´Öë †Öî¸ü ¯ÖÖÑ“Ö †ÓÛúÖë ¾ÖÖ»Öê ÃÖ³Öß ŸÖß®ÖÖë ¯ÖÏ¿®ÖÖë ´Öë ³Öߟָüß “ÖµÖ®Ö-×¾ÖÛú»¯Ö פü‹ ÝÖ‹ Æïü … ¯ÖÏŸµÖêÛú ¯Ö¸üßõÖÖ£Öá ÛúÖê 
‹êÃÖê ¯ÖÏ¿®ÖÖë Ûêú ¤üÖê ×¾ÖÛú»¯ÖÖë ´Öë ÃÖê ÛúÖê‡Ô ‹Ûú ¯ÖÏ¿®Ö Æü»Ö Ûú¸ü®ÖÖ Æîü …  
 Series : ONS/2 
57/2/3
• 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 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. 
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 
57/2/3 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 questions number 1 to 5, Very Short Answer type questions of 
one mark each. 
 (iii) Section B contains questions number 6 to 10, Short Answer type-I questions of two 
marks each. 
 (iv) Section C contains questions 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 questions 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. ‹Ûú ÃÖÓפüÝ¬Ö AIDS Ûêú ¸üÖêÝÖß ´Öë HIV ÛúÖ ¯ÖŸÖÖ »ÖÝÖÖ®Öê Ûêú ×»Ö‹ †Ö×Þ¾ÖÛú ®Öî¤üÖ×®ÖÛúú ×ÛÎúµÖÖ×¾Ö×¬Ö ÛúÖ ÃÖã—ÖÖ¾Ö      
¤üßו֋ …   1 
 Suggest a molecular diagnostic procedure that detects HIV in a suspected AIDS patient.  
  
2. ‹Ûú ‹ŒÃÖÖò®Ö ÃÖê ‹Ûú ‡®™ÒüÖò®Ö ´Öë ³Öê¤ü Ûú¸ü®Öê Ûêú ×»Ö‹ ‹Ûú †ÓŸÖ¸ü ²ÖŸÖÖ‡‹ … 1 
 Mention one difference to distinguish an exon from an intron.  
 
3. ×ÛúÃÖß Ã¯Öß¿Öß•ÖÌ Ûêú ×»Ö‹ ¯ÖÏÛéú×ŸÖ Ûúß ¾ÖÆü®Ö õÖ´ÖŸÖÖ ×ÛúÃÖ ²ÖÖŸÖ ÛúÖ ÃÖÓÛêúŸÖ ¤êüŸÖß Æîü ? 1 
 What does nature’s carrying capacity for a species indicate ? 
 
4. †Ö¬ÖÖ¸ü-׿ְ™ü ˆŸ¯Ö׸ü¾ÖŸÖÔ®Ö Ûêú ¤üÖê ÛúÖ¸üÞÖ ²ÖŸÖÖ‡‹ … 1 
 Mention two causes of frame-shift Mutation. 
 
5. ¤üÖê •ÖÓŸÖã†Öë Ûêú ®ÖÖ´Ö ²ÖŸÖÖ‡‹ וִ֮Öë ´Ö¤ü “ÖÛÎú ¯ÖϤüÙ¿ÖŸÖ ÆüÖêŸÖÖ Æîü … 1 
 Name two animals that exhibit Oestrus cycle. 
57/2/3 3 [P.T.O. 
ÜÖÞ›ü – ÜÖ 
SECTION – B 
6. ÃÖÓÛú™üÖ¯Ö®®Ö •Öî¾Ö ×¾Ö×¾Ö¬ÖŸÖÖ Ûêú ÃÖÓ¸üõÖÞÖ Ûêú ×»Ö‹ “ÖÖ¸ü ˆ®®ÖŸÖ þÖ-ãÖÖ®Öê ×¾Ö׬ֵÖÖë ÛúÖ ÃÖã—ÖÖ¾Ö ¤üßו֋ … 2 
 Suggest four advanced ex-situ methods to conserve threatened biodiversity. 
 
7. (a) ¯ÖãÂ¯Ö®Ö ÛúÖ»Ö Ûêú ¤üÖî¸üÖ®Ö ´Ö¬Öã´Ö׌ÜÖµÖÖë Ûúß ¯Öê×™üÛúÖ ÛúÖê ±úÃÖ»Ö ¾ÖÖ»Öê ÜÖêŸÖ ´Öë ¸üÜÖ®Öê Ûêú ¤üÖê »ÖÖ³Ö ×»Ö×ÜÖ‹ … 
 (b) ´Ö¬Öã´ÖŒÜÖß ÛúÖ ´ÖÖê´Ö ‹Ûú×¡ÖŸÖ Ûú¸ü®Öê Ûêú ×»Ö‹ ‹Ûú ¾ÖÖÙÂÖÛú †Öî¸ü ‹Ûú ²ÖÆãü¾ÖÂÖá ±úÃÖ»Ö Ûúß Ã¯Öß¿Öß•ÖÌÖë Ûêú ®ÖÖ´Ö 
²ÖŸÖÖ‡‹ …  2 
 (a) List two advantages of keeping beehives in a crop field during flowering season. 
 (b) Name one annual and one perennial crop species favourable to beeswax 
collection. 
8. ¾ÖÖ×ÆüŸÖ´Ö»Ö ÛúÖê †»Ö¾ÖÞÖ-•Ö»Ö-×®ÖÛúÖµÖ ´Öë ”ûÖê›Ìü®Öê ÃÖê ´Ö”û»Öß †×¬ÖÛú ´ÖÖ¡ÖÖ ´Öë ´Ö¸ü®Öê »ÖÝÖŸÖß Æïü … ¾µÖÖܵÖÖ Ûúßו֋ … 2 
 Sewage discharge into a clean-water body leads to increased fish mortality. Explain. 
 
9. ¯Ö¸üßõÖÖ£ÖÔ ÛÎúÖòÃÖ (ÃÖÓÛú¸üÞÖ) ÃÖê ‹Ûú ¾µÖ×™ü Ûêú •Öß®Ö ¯ÖϺþ¯Ö ÛúÖ ×®Ö¬ÖÖÔ¸üÞÖ Ûú¸ü®Öê ´Öë ÛîúÃÖê ´Ö¤ü¤ü ×´Ö»ÖŸÖß Æîü ? 2 
†£Ö¾ÖÖ 
 ›üß.‹®Ö.‹. ²ÖÆãüºþ¯ÖŸÖÖ Ûêú ¤üÖê †®Öã¯ÖϵÖÖêÝÖ ×»Ö×ÜÖ‹ … 
 How does a test cross help to determine the genotype of an individual ? 
              OR 
 Mention two applications of DNA polymorphism. 
 
10. áÖß Ûúß ±îú»ÖÖê¯Öß ®Ö»Öß ´Öë ¿ÖãÛÎúÖÞÖã †Öî¸ü †Ó›üÖÞÖã Ûêú ¯Ö¸üïָü ÃÖÓ¯ÖÛÔú ´Öë †Ö®Öê Ûêú ²ÖÖ¤ü ÆüÖê®Öê ¾ÖÖ»Öß ‘Ö™ü®ÖÖ†Öë Ûúß ¾µÖÖܵÖÖ 
Ûúßו֋ …   2 
 Explain the events that follow upto fertilization when the sperms come in contact with 
the ovum in the fallopian tube of a human female.  
 
ÜÖÞ›ü – ÝÖ 
SECTION – C 
11. •Öî¾Ö ×¾Ö×¾Ö¬ÖŸÖÖ ÃÖÓ¸üõÖÞÖ Ûêú ÃÖ´Ö£ÖÔ®Ö ´Öë ÃÖÓÛúßÞÖÔŸÖ: ˆ¯ÖµÖÖêÝÖß ŸÖÛÔú פü‹ •ÖÖŸÖê Æïü … ‡ÃÖß ˆ§êü¿µÖ Ûêú ÃÖ´Ö£ÖÔ®Ö ´Öë פü‹ •ÖÖ®Öê 
¾ÖÖ»Öê ¤üÖê †®µÖ ŸÖÛúÖí Ûúß ³Öß ¾µÖÖܵÖÖ Ûúßו֋ … 3 
 Narrowly utilitarian arguments are put forth in support of biodiversity conservation. 
Explain the other two arguments that are put forth in support of the same cause. 
Page 4


57/2/3 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-ˆ¢Ö¸üßµÖ ¯ÖÏ¿®Ö Æïü … ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö ‹Ûú †ÓÛú ÛúÖ Æîü …  
 (iii) ÜÖÞ›ü – ÜÖ ´Öë ¯ÖÏ¿®Ö ÃÖÓܵÖÖ 6 ÃÖê 10 »Ö‘Öã-ˆ¢Ö¸üßµÖü ¯ÖÏ¿®Ö I ¯ÖÏÛúÖ¸ü Ûêú Æïü, ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö ¤üÖê †ÓÛúÖë ÛúÖ Æîü …  
 (iv) ÜÖÞ›ü – ÝÖ ´Öë ¯ÖÏ¿®Ö ÃÖÓܵÖÖ 11 ÃÖê 22 »Ö‘Öã-ˆ¢Ö¸üßµÖ ¯ÖÏ¿®Ö II ¯ÖÏÛúÖ¸ü Ûêú Æïü, ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö ŸÖß®Ö †ÓÛúÖë ÛúÖ Æîü …  
 (v) ÜÖÞ›ü – ‘Ö ´Öë ¯ÖÏ¿®Ö ÃÖÓܵÖÖ 23 ´Öæ»µÖ †Ö¬ÖÖ׸üŸÖ ¯ÖÏ¿®Ö “ÖÖ¸ü †ÓÛúÖë ÛúÖ Æîü …  
 (vi) ÜÖÞ›ü – ’û  ´Öë ¯ÖÏ¿®Ö ÃÖÓܵÖÖ 24 ÃÖê 26 ¤üß‘ÖÔ-ˆ¢Ö¸üßµÖü ¯ÖÏ¿®Ö Æïü, ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö ¯ÖÖÑ“Ö †ÓÛúÖë ÛúÖ Æîü …  
 (vii) ¯ÖÏ¿®Ö-¯Ö¡Ö ´Öë ÃÖ´ÖÝÖÏ ¯Ö¸ü ÛúÖê‡Ô ×¾ÖÛú»¯Ö ®ÖÆüà Æîü, ×±ú¸ü ³Öß ¤üÖê †ÓÛúÖë ¾ÖÖ»Öê ‹Ûú ¯ÖÏ¿®Ö ´Öë, ŸÖß®Ö †ÓÛúÖë ¾ÖÖ»Öê ‹Ûú 
¯ÖÏ¿®Ö ´Öë †Öî¸ü ¯ÖÖÑ“Ö †ÓÛúÖë ¾ÖÖ»Öê ÃÖ³Öß ŸÖß®ÖÖë ¯ÖÏ¿®ÖÖë ´Öë ³Öߟָüß “ÖµÖ®Ö-×¾ÖÛú»¯Ö פü‹ ÝÖ‹ Æïü … ¯ÖÏŸµÖêÛú ¯Ö¸üßõÖÖ£Öá ÛúÖê 
‹êÃÖê ¯ÖÏ¿®ÖÖë Ûêú ¤üÖê ×¾ÖÛú»¯ÖÖë ´Öë ÃÖê ÛúÖê‡Ô ‹Ûú ¯ÖÏ¿®Ö Æü»Ö Ûú¸ü®ÖÖ Æîü …  
 Series : ONS/2 
57/2/3
• 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 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. 
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 
57/2/3 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 questions number 1 to 5, Very Short Answer type questions of 
one mark each. 
 (iii) Section B contains questions number 6 to 10, Short Answer type-I questions of two 
marks each. 
 (iv) Section C contains questions 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 questions 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. ‹Ûú ÃÖÓפüÝ¬Ö AIDS Ûêú ¸üÖêÝÖß ´Öë HIV ÛúÖ ¯ÖŸÖÖ »ÖÝÖÖ®Öê Ûêú ×»Ö‹ †Ö×Þ¾ÖÛú ®Öî¤üÖ×®ÖÛúú ×ÛÎúµÖÖ×¾Ö×¬Ö ÛúÖ ÃÖã—ÖÖ¾Ö      
¤üßו֋ …   1 
 Suggest a molecular diagnostic procedure that detects HIV in a suspected AIDS patient.  
  
2. ‹Ûú ‹ŒÃÖÖò®Ö ÃÖê ‹Ûú ‡®™ÒüÖò®Ö ´Öë ³Öê¤ü Ûú¸ü®Öê Ûêú ×»Ö‹ ‹Ûú †ÓŸÖ¸ü ²ÖŸÖÖ‡‹ … 1 
 Mention one difference to distinguish an exon from an intron.  
 
3. ×ÛúÃÖß Ã¯Öß¿Öß•ÖÌ Ûêú ×»Ö‹ ¯ÖÏÛéú×ŸÖ Ûúß ¾ÖÆü®Ö õÖ´ÖŸÖÖ ×ÛúÃÖ ²ÖÖŸÖ ÛúÖ ÃÖÓÛêúŸÖ ¤êüŸÖß Æîü ? 1 
 What does nature’s carrying capacity for a species indicate ? 
 
4. †Ö¬ÖÖ¸ü-׿ְ™ü ˆŸ¯Ö׸ü¾ÖŸÖÔ®Ö Ûêú ¤üÖê ÛúÖ¸üÞÖ ²ÖŸÖÖ‡‹ … 1 
 Mention two causes of frame-shift Mutation. 
 
5. ¤üÖê •ÖÓŸÖã†Öë Ûêú ®ÖÖ´Ö ²ÖŸÖÖ‡‹ וִ֮Öë ´Ö¤ü “ÖÛÎú ¯ÖϤüÙ¿ÖŸÖ ÆüÖêŸÖÖ Æîü … 1 
 Name two animals that exhibit Oestrus cycle. 
57/2/3 3 [P.T.O. 
ÜÖÞ›ü – ÜÖ 
SECTION – B 
6. ÃÖÓÛú™üÖ¯Ö®®Ö •Öî¾Ö ×¾Ö×¾Ö¬ÖŸÖÖ Ûêú ÃÖÓ¸üõÖÞÖ Ûêú ×»Ö‹ “ÖÖ¸ü ˆ®®ÖŸÖ þÖ-ãÖÖ®Öê ×¾Ö׬ֵÖÖë ÛúÖ ÃÖã—ÖÖ¾Ö ¤üßו֋ … 2 
 Suggest four advanced ex-situ methods to conserve threatened biodiversity. 
 
7. (a) ¯ÖãÂ¯Ö®Ö ÛúÖ»Ö Ûêú ¤üÖî¸üÖ®Ö ´Ö¬Öã´Ö׌ÜÖµÖÖë Ûúß ¯Öê×™üÛúÖ ÛúÖê ±úÃÖ»Ö ¾ÖÖ»Öê ÜÖêŸÖ ´Öë ¸üÜÖ®Öê Ûêú ¤üÖê »ÖÖ³Ö ×»Ö×ÜÖ‹ … 
 (b) ´Ö¬Öã´ÖŒÜÖß ÛúÖ ´ÖÖê´Ö ‹Ûú×¡ÖŸÖ Ûú¸ü®Öê Ûêú ×»Ö‹ ‹Ûú ¾ÖÖÙÂÖÛú †Öî¸ü ‹Ûú ²ÖÆãü¾ÖÂÖá ±úÃÖ»Ö Ûúß Ã¯Öß¿Öß•ÖÌÖë Ûêú ®ÖÖ´Ö 
²ÖŸÖÖ‡‹ …  2 
 (a) List two advantages of keeping beehives in a crop field during flowering season. 
 (b) Name one annual and one perennial crop species favourable to beeswax 
collection. 
8. ¾ÖÖ×ÆüŸÖ´Ö»Ö ÛúÖê †»Ö¾ÖÞÖ-•Ö»Ö-×®ÖÛúÖµÖ ´Öë ”ûÖê›Ìü®Öê ÃÖê ´Ö”û»Öß †×¬ÖÛú ´ÖÖ¡ÖÖ ´Öë ´Ö¸ü®Öê »ÖÝÖŸÖß Æïü … ¾µÖÖܵÖÖ Ûúßו֋ … 2 
 Sewage discharge into a clean-water body leads to increased fish mortality. Explain. 
 
9. ¯Ö¸üßõÖÖ£ÖÔ ÛÎúÖòÃÖ (ÃÖÓÛú¸üÞÖ) ÃÖê ‹Ûú ¾µÖ×™ü Ûêú •Öß®Ö ¯ÖϺþ¯Ö ÛúÖ ×®Ö¬ÖÖÔ¸üÞÖ Ûú¸ü®Öê ´Öë ÛîúÃÖê ´Ö¤ü¤ü ×´Ö»ÖŸÖß Æîü ? 2 
†£Ö¾ÖÖ 
 ›üß.‹®Ö.‹. ²ÖÆãüºþ¯ÖŸÖÖ Ûêú ¤üÖê †®Öã¯ÖϵÖÖêÝÖ ×»Ö×ÜÖ‹ … 
 How does a test cross help to determine the genotype of an individual ? 
              OR 
 Mention two applications of DNA polymorphism. 
 
10. áÖß Ûúß ±îú»ÖÖê¯Öß ®Ö»Öß ´Öë ¿ÖãÛÎúÖÞÖã †Öî¸ü †Ó›üÖÞÖã Ûêú ¯Ö¸üïָü ÃÖÓ¯ÖÛÔú ´Öë †Ö®Öê Ûêú ²ÖÖ¤ü ÆüÖê®Öê ¾ÖÖ»Öß ‘Ö™ü®ÖÖ†Öë Ûúß ¾µÖÖܵÖÖ 
Ûúßו֋ …   2 
 Explain the events that follow upto fertilization when the sperms come in contact with 
the ovum in the fallopian tube of a human female.  
 
ÜÖÞ›ü – ÝÖ 
SECTION – C 
11. •Öî¾Ö ×¾Ö×¾Ö¬ÖŸÖÖ ÃÖÓ¸üõÖÞÖ Ûêú ÃÖ´Ö£ÖÔ®Ö ´Öë ÃÖÓÛúßÞÖÔŸÖ: ˆ¯ÖµÖÖêÝÖß ŸÖÛÔú פü‹ •ÖÖŸÖê Æïü … ‡ÃÖß ˆ§êü¿µÖ Ûêú ÃÖ´Ö£ÖÔ®Ö ´Öë פü‹ •ÖÖ®Öê 
¾ÖÖ»Öê ¤üÖê †®µÖ ŸÖÛúÖí Ûúß ³Öß ¾µÖÖܵÖÖ Ûúßו֋ … 3 
 Narrowly utilitarian arguments are put forth in support of biodiversity conservation. 
Explain the other two arguments that are put forth in support of the same cause. 
57/2/3 4  
12. (a) ‹Ûú ¯Ö׸ü¯ÖŒ¾Ö 7-ÛúÖê׿ÖÛúÖ ŸÖ£ÖÖ 8-®µÖæ׌»ÖµÖÃÖ ¾ÖÖ»Öê ³ÖÏæÞÖ-ÛúÖê¿Ö ÛúÖ ®ÖÖ´ÖÖÓ×ÛúŸÖ †Ö¸êüÜÖ ²Ö®ÖÖ‡‹ … 
 (b) ³ÖÏæÞÖ-ÛúÖê¿Ö Ûúß ÛúÖî®Ö ÃÖß ‹Ûú ÛúÖê׿ÖÛúÖ ¤üÖêÆü¸êü ×®ÖÂÖê“Ö®Ö Ûêú ²ÖÖ¤ü ‹Ó›üÖêïִÖÔ ²Ö®ÖÖŸÖß Æîü ? 3 
 (a) Draw a labelled sketch of a mature 7-celled, 8-nucleate embryo-sac. 
 (b) Which one of the cell in an embryo-sac produce endosperm after double 
fertilization ?  
 
13. ³ÖÏæÞÖßµÖ †¾ÖãÖÖ ÛúÖ ®ÖÖ´ÖÖÓ×ÛúŸÖ †Ö¸êüÜÖ ²Ö®ÖÖ‡‹ •ÖÖê áÖß Ûêú ÝÖ³ÖÖÔ¿ÖµÖ Ûêú ³Öߟָü †ÓŸÖ¸üÖì×¯ÖŸÖ ÆüÖê •ÖÖŸÖÖ Æîü … ¤üÖê ®ÖÖ´ÖÖÓ×ÛúŸÖ 
³ÖÖÝÖÖë Ûêú ÛúÖµÖÔ ²ÖŸÖÖ‡‹ … 3 
 Draw a labelled diagram of the embryonic stage that gets implanted in the human 
uterus. State the functions of the two parts labelled. 
 
14. ¯ÖÏÖÛËúÛêú®¦üÛúßµÖ DNA ´Öë ‹Ûú †Öò¯Ö¸êü™ü¸ü ÛúÆüÖÑ ×Ã£ÖŸÖ ÆüÖêŸÖÖ Æîü ? ¯ÖÏÖÛËúÛêú®¦üÛúß ´Öë †®Öã»ÖêÜÖ®Ö ÃŸÖ¸ü •Öß®Ö-†×³Ö¾µÖ׌ŸÖ ÛúÖê 
×ÛúÃÖ ¯ÖÏÛúÖ¸ü ×®ÖµÖ×´ÖŸÖ Ûú¸üŸÖÖ Æîü ? ¾µÖÖܵÖÖ Ûúßו֋ … 3 
 Where is an ‘operator’ located in a prokaryote DNA ? How does an operator regulate 
gene expression at transcriptional level in a prokaryote ? Explain.  
 
15. DNA ¯Öã®ÖµÖÖìÝÖ•Ö ¯ÖÏÖîªÖê×ÝÖÛúß ´Öë ¯ÖÏןֲÖÓ¬Ö®Ö (¸êü×ÙÒüŒ¿Ö®Ö) ‹Ó›üÖꮵÖæ׌»Ö‹ê•ÖÌ ×ÛúÃÖ ¯ÖÏÛúÖ¸ü ´Ö¤ü¤ü Ûú¸üŸÖÖ Æîü ? 3 
 How does a restriction endonuclease help in DNA recombinant technology ? 
 
16. ´ÖÖ®Ö¾Ö ¹ý׬ָü-¾ÖÝÖÔ ²ÖÆãü×¾ÖÛú»¯ÖŸÖÖ †Öî¸ü ÃÖÆü¯ÖϳÖÖ×¾ÖŸÖÖ ÛúÖ ‹Ûú †“”ûÖ ˆ¤üÖÆü¸üÞÖ Æîü … µÖã׌ŸÖ ÃÖÓÝÖŸÖŸÖÖ ²ÖŸÖÖ‡‹ … 3 
 Human blood group is a good example of multiple allelism and co-dominance. Justify.  
  
17. ¯Öã®ÖµÖÖìÝÖ•Ö DNA ÛúÖ ¯ÖŸÖÖ »ÖÝÖÖ®Öê Ûêú ×»Ö‹ ‘†ÓŸÖÙ¾Ö™ü ×®Ö×ÂÛÎúµÖÞÖ’ ×¾Ö×¬Ö ÛúÖê ‘¯ÖÏן֕Öî×¾ÖÛú ¯ÖÏןָüÖê¬Öß’ ×ÛÎúµÖÖ×¾Ö×¬Ö Ûúß 
•ÖÝÖÆü ŒµÖÖë ¾Ö¸üßµÖŸÖÖ ¤üß •ÖÖŸÖß Æîü ? 3 
 Why does the ‘insertional inactivation’ method to detect recombinant DNA is preferred 
to ‘antibiotic resistance’ procedure ? 
Page 5


57/2/3 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-ˆ¢Ö¸üßµÖ ¯ÖÏ¿®Ö Æïü … ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö ‹Ûú †ÓÛú ÛúÖ Æîü …  
 (iii) ÜÖÞ›ü – ÜÖ ´Öë ¯ÖÏ¿®Ö ÃÖÓܵÖÖ 6 ÃÖê 10 »Ö‘Öã-ˆ¢Ö¸üßµÖü ¯ÖÏ¿®Ö I ¯ÖÏÛúÖ¸ü Ûêú Æïü, ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö ¤üÖê †ÓÛúÖë ÛúÖ Æîü …  
 (iv) ÜÖÞ›ü – ÝÖ ´Öë ¯ÖÏ¿®Ö ÃÖÓܵÖÖ 11 ÃÖê 22 »Ö‘Öã-ˆ¢Ö¸üßµÖ ¯ÖÏ¿®Ö II ¯ÖÏÛúÖ¸ü Ûêú Æïü, ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö ŸÖß®Ö †ÓÛúÖë ÛúÖ Æîü …  
 (v) ÜÖÞ›ü – ‘Ö ´Öë ¯ÖÏ¿®Ö ÃÖÓܵÖÖ 23 ´Öæ»µÖ †Ö¬ÖÖ׸üŸÖ ¯ÖÏ¿®Ö “ÖÖ¸ü †ÓÛúÖë ÛúÖ Æîü …  
 (vi) ÜÖÞ›ü – ’û  ´Öë ¯ÖÏ¿®Ö ÃÖÓܵÖÖ 24 ÃÖê 26 ¤üß‘ÖÔ-ˆ¢Ö¸üßµÖü ¯ÖÏ¿®Ö Æïü, ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö ¯ÖÖÑ“Ö †ÓÛúÖë ÛúÖ Æîü …  
 (vii) ¯ÖÏ¿®Ö-¯Ö¡Ö ´Öë ÃÖ´ÖÝÖÏ ¯Ö¸ü ÛúÖê‡Ô ×¾ÖÛú»¯Ö ®ÖÆüà Æîü, ×±ú¸ü ³Öß ¤üÖê †ÓÛúÖë ¾ÖÖ»Öê ‹Ûú ¯ÖÏ¿®Ö ´Öë, ŸÖß®Ö †ÓÛúÖë ¾ÖÖ»Öê ‹Ûú 
¯ÖÏ¿®Ö ´Öë †Öî¸ü ¯ÖÖÑ“Ö †ÓÛúÖë ¾ÖÖ»Öê ÃÖ³Öß ŸÖß®ÖÖë ¯ÖÏ¿®ÖÖë ´Öë ³Öߟָüß “ÖµÖ®Ö-×¾ÖÛú»¯Ö פü‹ ÝÖ‹ Æïü … ¯ÖÏŸµÖêÛú ¯Ö¸üßõÖÖ£Öá ÛúÖê 
‹êÃÖê ¯ÖÏ¿®ÖÖë Ûêú ¤üÖê ×¾ÖÛú»¯ÖÖë ´Öë ÃÖê ÛúÖê‡Ô ‹Ûú ¯ÖÏ¿®Ö Æü»Ö Ûú¸ü®ÖÖ Æîü …  
 Series : ONS/2 
57/2/3
• 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 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. 
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 
57/2/3 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 questions number 1 to 5, Very Short Answer type questions of 
one mark each. 
 (iii) Section B contains questions number 6 to 10, Short Answer type-I questions of two 
marks each. 
 (iv) Section C contains questions 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 questions 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. ‹Ûú ÃÖÓפüÝ¬Ö AIDS Ûêú ¸üÖêÝÖß ´Öë HIV ÛúÖ ¯ÖŸÖÖ »ÖÝÖÖ®Öê Ûêú ×»Ö‹ †Ö×Þ¾ÖÛú ®Öî¤üÖ×®ÖÛúú ×ÛÎúµÖÖ×¾Ö×¬Ö ÛúÖ ÃÖã—ÖÖ¾Ö      
¤üßו֋ …   1 
 Suggest a molecular diagnostic procedure that detects HIV in a suspected AIDS patient.  
  
2. ‹Ûú ‹ŒÃÖÖò®Ö ÃÖê ‹Ûú ‡®™ÒüÖò®Ö ´Öë ³Öê¤ü Ûú¸ü®Öê Ûêú ×»Ö‹ ‹Ûú †ÓŸÖ¸ü ²ÖŸÖÖ‡‹ … 1 
 Mention one difference to distinguish an exon from an intron.  
 
3. ×ÛúÃÖß Ã¯Öß¿Öß•ÖÌ Ûêú ×»Ö‹ ¯ÖÏÛéú×ŸÖ Ûúß ¾ÖÆü®Ö õÖ´ÖŸÖÖ ×ÛúÃÖ ²ÖÖŸÖ ÛúÖ ÃÖÓÛêúŸÖ ¤êüŸÖß Æîü ? 1 
 What does nature’s carrying capacity for a species indicate ? 
 
4. †Ö¬ÖÖ¸ü-׿ְ™ü ˆŸ¯Ö׸ü¾ÖŸÖÔ®Ö Ûêú ¤üÖê ÛúÖ¸üÞÖ ²ÖŸÖÖ‡‹ … 1 
 Mention two causes of frame-shift Mutation. 
 
5. ¤üÖê •ÖÓŸÖã†Öë Ûêú ®ÖÖ´Ö ²ÖŸÖÖ‡‹ וִ֮Öë ´Ö¤ü “ÖÛÎú ¯ÖϤüÙ¿ÖŸÖ ÆüÖêŸÖÖ Æîü … 1 
 Name two animals that exhibit Oestrus cycle. 
57/2/3 3 [P.T.O. 
ÜÖÞ›ü – ÜÖ 
SECTION – B 
6. ÃÖÓÛú™üÖ¯Ö®®Ö •Öî¾Ö ×¾Ö×¾Ö¬ÖŸÖÖ Ûêú ÃÖÓ¸üõÖÞÖ Ûêú ×»Ö‹ “ÖÖ¸ü ˆ®®ÖŸÖ þÖ-ãÖÖ®Öê ×¾Ö׬ֵÖÖë ÛúÖ ÃÖã—ÖÖ¾Ö ¤üßו֋ … 2 
 Suggest four advanced ex-situ methods to conserve threatened biodiversity. 
 
7. (a) ¯ÖãÂ¯Ö®Ö ÛúÖ»Ö Ûêú ¤üÖî¸üÖ®Ö ´Ö¬Öã´Ö׌ÜÖµÖÖë Ûúß ¯Öê×™üÛúÖ ÛúÖê ±úÃÖ»Ö ¾ÖÖ»Öê ÜÖêŸÖ ´Öë ¸üÜÖ®Öê Ûêú ¤üÖê »ÖÖ³Ö ×»Ö×ÜÖ‹ … 
 (b) ´Ö¬Öã´ÖŒÜÖß ÛúÖ ´ÖÖê´Ö ‹Ûú×¡ÖŸÖ Ûú¸ü®Öê Ûêú ×»Ö‹ ‹Ûú ¾ÖÖÙÂÖÛú †Öî¸ü ‹Ûú ²ÖÆãü¾ÖÂÖá ±úÃÖ»Ö Ûúß Ã¯Öß¿Öß•ÖÌÖë Ûêú ®ÖÖ´Ö 
²ÖŸÖÖ‡‹ …  2 
 (a) List two advantages of keeping beehives in a crop field during flowering season. 
 (b) Name one annual and one perennial crop species favourable to beeswax 
collection. 
8. ¾ÖÖ×ÆüŸÖ´Ö»Ö ÛúÖê †»Ö¾ÖÞÖ-•Ö»Ö-×®ÖÛúÖµÖ ´Öë ”ûÖê›Ìü®Öê ÃÖê ´Ö”û»Öß †×¬ÖÛú ´ÖÖ¡ÖÖ ´Öë ´Ö¸ü®Öê »ÖÝÖŸÖß Æïü … ¾µÖÖܵÖÖ Ûúßו֋ … 2 
 Sewage discharge into a clean-water body leads to increased fish mortality. Explain. 
 
9. ¯Ö¸üßõÖÖ£ÖÔ ÛÎúÖòÃÖ (ÃÖÓÛú¸üÞÖ) ÃÖê ‹Ûú ¾µÖ×™ü Ûêú •Öß®Ö ¯ÖϺþ¯Ö ÛúÖ ×®Ö¬ÖÖÔ¸üÞÖ Ûú¸ü®Öê ´Öë ÛîúÃÖê ´Ö¤ü¤ü ×´Ö»ÖŸÖß Æîü ? 2 
†£Ö¾ÖÖ 
 ›üß.‹®Ö.‹. ²ÖÆãüºþ¯ÖŸÖÖ Ûêú ¤üÖê †®Öã¯ÖϵÖÖêÝÖ ×»Ö×ÜÖ‹ … 
 How does a test cross help to determine the genotype of an individual ? 
              OR 
 Mention two applications of DNA polymorphism. 
 
10. áÖß Ûúß ±îú»ÖÖê¯Öß ®Ö»Öß ´Öë ¿ÖãÛÎúÖÞÖã †Öî¸ü †Ó›üÖÞÖã Ûêú ¯Ö¸üïָü ÃÖÓ¯ÖÛÔú ´Öë †Ö®Öê Ûêú ²ÖÖ¤ü ÆüÖê®Öê ¾ÖÖ»Öß ‘Ö™ü®ÖÖ†Öë Ûúß ¾µÖÖܵÖÖ 
Ûúßו֋ …   2 
 Explain the events that follow upto fertilization when the sperms come in contact with 
the ovum in the fallopian tube of a human female.  
 
ÜÖÞ›ü – ÝÖ 
SECTION – C 
11. •Öî¾Ö ×¾Ö×¾Ö¬ÖŸÖÖ ÃÖÓ¸üõÖÞÖ Ûêú ÃÖ´Ö£ÖÔ®Ö ´Öë ÃÖÓÛúßÞÖÔŸÖ: ˆ¯ÖµÖÖêÝÖß ŸÖÛÔú פü‹ •ÖÖŸÖê Æïü … ‡ÃÖß ˆ§êü¿µÖ Ûêú ÃÖ´Ö£ÖÔ®Ö ´Öë פü‹ •ÖÖ®Öê 
¾ÖÖ»Öê ¤üÖê †®µÖ ŸÖÛúÖí Ûúß ³Öß ¾µÖÖܵÖÖ Ûúßו֋ … 3 
 Narrowly utilitarian arguments are put forth in support of biodiversity conservation. 
Explain the other two arguments that are put forth in support of the same cause. 
57/2/3 4  
12. (a) ‹Ûú ¯Ö׸ü¯ÖŒ¾Ö 7-ÛúÖê׿ÖÛúÖ ŸÖ£ÖÖ 8-®µÖæ׌»ÖµÖÃÖ ¾ÖÖ»Öê ³ÖÏæÞÖ-ÛúÖê¿Ö ÛúÖ ®ÖÖ´ÖÖÓ×ÛúŸÖ †Ö¸êüÜÖ ²Ö®ÖÖ‡‹ … 
 (b) ³ÖÏæÞÖ-ÛúÖê¿Ö Ûúß ÛúÖî®Ö ÃÖß ‹Ûú ÛúÖê׿ÖÛúÖ ¤üÖêÆü¸êü ×®ÖÂÖê“Ö®Ö Ûêú ²ÖÖ¤ü ‹Ó›üÖêïִÖÔ ²Ö®ÖÖŸÖß Æîü ? 3 
 (a) Draw a labelled sketch of a mature 7-celled, 8-nucleate embryo-sac. 
 (b) Which one of the cell in an embryo-sac produce endosperm after double 
fertilization ?  
 
13. ³ÖÏæÞÖßµÖ †¾ÖãÖÖ ÛúÖ ®ÖÖ´ÖÖÓ×ÛúŸÖ †Ö¸êüÜÖ ²Ö®ÖÖ‡‹ •ÖÖê áÖß Ûêú ÝÖ³ÖÖÔ¿ÖµÖ Ûêú ³Öߟָü †ÓŸÖ¸üÖì×¯ÖŸÖ ÆüÖê •ÖÖŸÖÖ Æîü … ¤üÖê ®ÖÖ´ÖÖÓ×ÛúŸÖ 
³ÖÖÝÖÖë Ûêú ÛúÖµÖÔ ²ÖŸÖÖ‡‹ … 3 
 Draw a labelled diagram of the embryonic stage that gets implanted in the human 
uterus. State the functions of the two parts labelled. 
 
14. ¯ÖÏÖÛËúÛêú®¦üÛúßµÖ DNA ´Öë ‹Ûú †Öò¯Ö¸êü™ü¸ü ÛúÆüÖÑ ×Ã£ÖŸÖ ÆüÖêŸÖÖ Æîü ? ¯ÖÏÖÛËúÛêú®¦üÛúß ´Öë †®Öã»ÖêÜÖ®Ö ÃŸÖ¸ü •Öß®Ö-†×³Ö¾µÖ׌ŸÖ ÛúÖê 
×ÛúÃÖ ¯ÖÏÛúÖ¸ü ×®ÖµÖ×´ÖŸÖ Ûú¸üŸÖÖ Æîü ? ¾µÖÖܵÖÖ Ûúßו֋ … 3 
 Where is an ‘operator’ located in a prokaryote DNA ? How does an operator regulate 
gene expression at transcriptional level in a prokaryote ? Explain.  
 
15. DNA ¯Öã®ÖµÖÖìÝÖ•Ö ¯ÖÏÖîªÖê×ÝÖÛúß ´Öë ¯ÖÏןֲÖÓ¬Ö®Ö (¸êü×ÙÒüŒ¿Ö®Ö) ‹Ó›üÖꮵÖæ׌»Ö‹ê•ÖÌ ×ÛúÃÖ ¯ÖÏÛúÖ¸ü ´Ö¤ü¤ü Ûú¸üŸÖÖ Æîü ? 3 
 How does a restriction endonuclease help in DNA recombinant technology ? 
 
16. ´ÖÖ®Ö¾Ö ¹ý׬ָü-¾ÖÝÖÔ ²ÖÆãü×¾ÖÛú»¯ÖŸÖÖ †Öî¸ü ÃÖÆü¯ÖϳÖÖ×¾ÖŸÖÖ ÛúÖ ‹Ûú †“”ûÖ ˆ¤üÖÆü¸üÞÖ Æîü … µÖã׌ŸÖ ÃÖÓÝÖŸÖŸÖÖ ²ÖŸÖÖ‡‹ … 3 
 Human blood group is a good example of multiple allelism and co-dominance. Justify.  
  
17. ¯Öã®ÖµÖÖìÝÖ•Ö DNA ÛúÖ ¯ÖŸÖÖ »ÖÝÖÖ®Öê Ûêú ×»Ö‹ ‘†ÓŸÖÙ¾Ö™ü ×®Ö×ÂÛÎúµÖÞÖ’ ×¾Ö×¬Ö ÛúÖê ‘¯ÖÏן֕Öî×¾ÖÛú ¯ÖÏןָüÖê¬Öß’ ×ÛÎúµÖÖ×¾Ö×¬Ö Ûúß 
•ÖÝÖÆü ŒµÖÖë ¾Ö¸üßµÖŸÖÖ ¤üß •ÖÖŸÖß Æîü ? 3 
 Why does the ‘insertional inactivation’ method to detect recombinant DNA is preferred 
to ‘antibiotic resistance’ procedure ? 
57/2/3 5 [P.T.O. 
18. ×ÛúÃÖß ¯ÖÆüÖ›Ìüß Ã£ÖÖ®Ö Ûúß ÃÖî¸ü Ûú¸ü®Öê ¯Ö¸ü †Ö¯ÖÛêú ‹Ûú ×´Ö¡Ö Ûúß ŸÖ×²ÖµÖŸÖ †“ÖÖ®ÖÛú ÜÖ¸üÖ²Ö ÆüÖê ÝÖµÖß †Öî¸ü ˆÃÖê ²Öî“Öê®Öß 
´ÖÆüÃÖæÃÖ ÆüÖê®Öê »ÖÝÖß … 
 (a) ÛúÖê‡Ô ‹êÃÖê ¤üÖê ¸üÖêÝÖ »ÖõÖÞÖ ²ÖŸÖÖ‡‹ וÖÃÖÛêú ÛúÖ¸üÞÖ µÖÆü ‹ê»Ö•Öá ÆüÖê ÝÖµÖß … 
 (b) ×ÛúÃÖß ‹ê»Ö•ÖÔ®Ö Ûêú ¯ÖÏ×ŸÖ ÆüÖê®Öê ¾ÖÖ»Öß ¿Ö¸ü߸ü Ûúß †®Öã×ÛÎúµÖÖ Ûúß ¾µÖÖܵÖÖ Ûúßו֋ … 
 (c) ŸÖÖŸÛúÖ×»ÖÛú †Ö¸üÖ´Ö ¤êü®Öê Ûêú ×»Ö‹ ×Ûú®Æüà ¤üÖê †ÖîÂÖ׬ֵÖÖë Ûêú ®ÖÖ´Ö ²ÖŸÖÖ‡‹ … 3 
 On a visit to a Hill station, one of your friend suddenly became unwell and felt uneasy. 
 (a) List two symptoms you would look for to term it to be due to allergy. 
 (b) Explain the response of the body to an allergen. 
 (c) Name two drugs that can be recommended for immediate relief.  
 
19. (a) Æü¿Öì †Öî¸ü “Öê•ÖÌ ®Öê †¯Ö®Öê ¯ÖϵÖÖêÝÖ ´Öë ¸êü×›üµÖÖê ÃÖ×ÛÎúµÖ ÃÖ»±ú¸ü †Öî¸ü ¸êü×›üµÖÖê ÃÖ×ÛÎúµÖ ±ÌúÖòñÌúÖê¸üÃÖ ÛúÖ ˆ¯ÖµÖÖêÝÖ ŒµÖÖë 
×ÛúµÖÖ ? 
 (b) †ÓŸÖ ´Öë ¾Öê ×ÛúÃÖ ×®ÖÂÛúÂÖÔ ¯Ö¸ü ¯ÖÆãÑü“Öê ? †Öî¸ü ÛîúÃÖê  ? “Ö“ÖÖÔ Ûúßו֋ … 3 
 (a) Why did Hershey and Chase use radioactive sulfur and radioactive phosphorus in 
their experiment ? 
 (b) Write the conclusion they arrived at and how. 
 
20. ÃÖ´Öã¦ü ´Öë •Öß¾ÖÃÖÓÆü×ŸÖ Ûêú ׯָîü×´Ö›ü ‹¾ÖÓ ‰ú•ÖÖÔ Ûêú ׯָîü×´Ö›ü Ûêú †Ö¸êüÜÖ ²Ö®ÖÖ‡‹ … ²Ö®ÖÖ‹ ÝÖ‹ ׯָîü×´Ö›üÖë Ûêú ¯ÖÏÛúÖ¸üÖë ¯Ö¸ü 
†¯Ö®Öê ×¾Ö“ÖÖ¸ü ¯ÖÏÛú™ü Ûúßו֋ … 3 
†£Ö¾ÖÖ 
 (a) ×®Ö´®Ö×»Ö×ÜÖŸÖ ÝÖÏß®ÖÆüÖˆÃÖ ÝÖîÃÖÖë ÛúÖê ˆ®ÖÛêú ÃÖÛú»Ö ¾Öî׿¾ÖÛú ‰ú´ÖÞÖ ´Öë †Ö¯Öê×õÖÛú µÖÖêÝÖ¤üÖ®Ö Ûêú ¾Öéרü´ÖÖ®Ö ÛÎú´Ö ´Öë 
×»Ö×ÜÖ‹ : 
   N
2
O; CFC; CO
2
; C
2
H
4
. 
 (b) ¾Öî׿¾ÖÛú ‰ú´ÖÞÖ ÛúÖ ¬ÖÐã¾ÖßµÖ ²Ö±úá»Öß “ÖÖê×™üµÖÖë ¯Ö¸ü ŒµÖÖ ¯ÖϳÖÖ¾Ö ¯Ö›ÌüŸÖÖ Æîü ? ‡ÃÖÛêú ÃÖÓ³ÖÖ¾Öß ¯ÖÖ׸ü×ãÖןÖÛúßµÖ ¯ÖϳÖÖ¾Ö 
Ûúß “Ö“ÖÖÔ Ûúßו֋ … 
 Draw a pyramid of biomass and pyramid of energy in sea. Give your comments on the 
type of pyramids drawn. 
OR 
 (a) Rearrange the following greenhouse gases in increasing order of their relative 
contribution to the total global warming :  
   N
2
O; CFC; CO
2
; C
2
H
4
. 
 (b) What is the effect of global warming on polar ice-caps ? Comment on its possible 
ecological impact.