TN 11th Question Paper 2026 Zoology

FOR TN 11TH EXAM PREPARATION

TN 11th 2026
Question Paper ·
Zoology
EXAM YEAR TYPE SUBJECT

TN 11th 2026 Question Paper Zoology

Notes · Sample Papers · Previous Year Papers · Mock Tests

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No. of Printed Pages : 8
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!9137IstYearZoology! £vÄ Gs
Register Number

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PART - III

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( / Tamil & English Version)

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Põ» AÍÄ : 3.00 ] [ ö©õzu ©v¨ö£sPÒ : 70

Time Allowed : 3.00 Hours ] [ Maximum Marks : 70

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Instructions : (1)
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Check the question paper for fairness of printing. If there is any lack of fairness,

inform the Hall Supervisor immediately.

(2) Use Blue or Black ink to write and underline and pencil to draw diagrams.

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Note : (i) Answer all the questions.

(ii) Choose the most appropriate answer from the given four alternatives and write

the option code and the corresponding answer.

[ v¸¨¦P / Turn over

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a For more Question Papers, Sample Papers, Notes & Syllabus visit Page 1 of 8

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1. CUv÷¯õ¤ì G¢u ÁS¨ø£a \õº¢ux ?
(A) C¸ÁõÌÂPÒ (B) «ßPÒ
(C) £Ó¨£Ú (D) FºÁÚ
Ichthyophis belongs to which Class ?

(a) Amphibians (b) Fishes

(c) Aves (d) Reptiles

2. Pµ¨£õß §a]°ß £õºøÁ°ß ÁøP :
(A) ö©õø\U
(B) •¨£›©õn®
(C) Pµ¨£õß §a]°À £õºøÁ Põn¨£kÁvÀø»
(D) C¸ £›©õn®
The type of vision in Cockroach is :

(a) Mosaic

(b) Three-dimensional

(c) Cockroaches do not have vision

(d) Two-dimensional

3. G¢u Cøn uÁÓõÚx ?
(A) øÁmhªß & ©»mkzußø©
K

(B) øÁmhªß & ›UöPmì D

(C) {¯õ]ß & ö£»Uµõ
(D) u¯ªß & ö£›ö£›
Which of the following combinations are not correctly matched ?

(a) Vitamin K - Sterility

(b) Vitamin D - Rickets

(c) Niacin - Pellagra

(d) Thiamine - Beriberi

4. J¸ ]ØÔÚzv¾ÒÍ EÖ¨¤ÚºPÐUQøh÷¯ ªP AvP AÍÂÀ ©õÖ£õkPÒ
Põn¨£mhõÀ £¯ß£kzu¨£kQÓx.
__________

(A) •¨ö£¯›k® •øÓ (B) hõm÷hõøÚª
(C) C¸ ö\õÀ ö£¯›k® •øÓ (D) ÁøP£õmi¯À
When members of any species have large variations then _________ system is used.

(a) Trinomial (b) Tautonymy

(c) Binomial (d) Taxonomy

For more Question Papers, Sample Papers, Notes & Syllabus visit Page 2 of 8

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5. CøÁ ]øuUP¨£kÁuõÀ G›z÷µõ¤Íõì÷hõ]ì L¥mhõ¼ì HØ£kQÓx.
(A) P¸Âß Cµzu öÁÒøͯqUPÒ
(B) P¸Âß Cµzu ]Á¨£qUPÒ
(C) P¸, ªÚªmhõ ÷|õ¯õÀ £õvUP¨£kuÀ
(D) P¸, Cu¯ CµzuUSÇÀ Aøh¨£õÀ £õvUP¨£kuÀ
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Erythroblastosis foetalis is due to the destruction of :
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(a) Foetal WBCs

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(b) Foetal RBCs

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(c) Foetus suffers from Minamata

(d)

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Foetus suffers from Atherosclerosis

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BºÛzøuß _ÇØ]°ß ÂøÍö£õ¸Ò ¯õx ?
(A) ³›¯õ (B) Põº£ß øhBUøék
(C) A®÷©õÛ¯õ (D) ³›U Aª»®
The end product of Ornithine cycle is :

(a) Urea (b) Carbondioxide

(c) Ammonia (d) Uric Acid

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7. A÷¯õiß P»¢u E¨¦ ukzu¼À •UQ¯¨ £[PõØÖQÓx.
__________

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(A) Põ´hº (B) ›UöPmì (C) AU÷µõö©P¼ (D) ìPºÂ

(a) Goitre
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Iodised salt is essential to prevent :

(b) Rickets (c) Acromegaly (d) Scurvy

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8. CêßQÍõì GvÀ £¯ß£kzu¨£kQÓx ?
(A) J°øÚ ÁiPmi¨¤›zuÀ (B) J°ß u¯õ›zuÀ
(C) J°øÚ¨ £u¨£kzuÀ (D) J°øÚ _zvP›UP
Isinglass is used in :

(a) Distillation of wines (b) Preparation of wines

(c) Preservation of wines (d) Clearing of wines

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9. J¸ G¾®ø£ ©Ø÷Óõº G¾®¦hß Cøn¨£x __________ .
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(A) G¾®¤øn¨¦ (B) uø\ |õs
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las __________ attach one bone to another.

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(a) Ligaments (b) Tendon

a (c) Muscle fibres (d) Collagen

10. {£¢uøÚ AÛaø\aö\¯À G¢u »[QÀ B´Ä ö\´¯¨£mhx ?
(A) •¯À (B) G¼ (C) |õ´ (D) §øÚ
In which animal classical conditioning experiment is conducted ?

(a) Rabbit (b) Rat (c) Dog (d) Cat

[ v¸¨¦P / Turn over

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a For more Question Papers, Sample Papers, Notes & Syllabus visit Page 3 of 8

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11. ~÷©miU (PõØÓøÓ öPõsh) G¾®¦PÒ Põn¨£k® E°› :
(A) FºÁÚ (B) £õ¿miPÒ
(C) PhØ£g_PÒ (D) £ÓøÁPÒ
Pneumatic bones are seen in :

(a) Reptilia (b) Mammalia

(c) Sponges (d) Aves

12. §a]PÎß _Áõ\ EÖ¨¦PÒ :
(A) £aø\ _µ¨¤PÒ (B) ‰a_U SÇÀPÒ
(C) ~øµ±µÀPÒ (D) ö\ÄÒPÒ
The respiratory structures of insects are :

(a) Green glands (b) Tracheal tubes

(c) Lungs (d) Gills

13. RÌPshÁØÖÒ \›¯õÚ Cønø¯z ÷uº¢öuk.
(A) EnºÄ |µ®¦ & Á°ØÖ¨¦Ó®
(B) EnºÄ |µ®¦ & Emö\À¾uÀ
(C) C¯US |µ®¦ & •xS¨¦Ó®
(D) C¯US |µ®¦ & Emö\À¾uÀ
Which of the following pairings is correct ?

(a) Sensory nerve - Ventral

(b) Sensory nerve - Afferent

(c) Motor nerve - Dorsal

(d) Motor nerve - Afferent

14. ©ÛuÛß C¯À£õÚ Cµzu AÊzu AÍÄ :
(A) ª.«. £õuµ\®
120/80 (B) 130/90 ª.«. £õuµ\®
(C) ª.«. £õuµ\®
160/100 (D) 140/100 ª.«. £õuµ\®
Normal Blood Pressure in human is :

(a) 120/80 mmHg (b) 130/90 mmHg

(c) 160/100 mmHg (d) 140/100 mmHg

15. uø\ |õºPÎß ö\¯À A»S :
(A) ø©÷¯õ]ß (B) \õº÷Põª¯º
(C) BUiß (D) \õº÷Põ¤Íõ\®
The functional unit of a muscle fibre is :

(a) Myosin (b) Sarcomere

(c) Actin (d) Sarcoplasm

For more Question Papers, Sample Papers, Notes & Syllabus visit Page 4 of 8

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£Sv & II / PART - II

SÔ¨¦ : GøÁ÷¯Ý® BÖ ÂÚõUPÐUS Âøh¯ÎUPÄ®. ÂÚõ Gs 24 &US
Pmhõ¯©õP Âøh¯ÎUPÄ®. 6x2=12

Note : Answer any six questions. Question No. 24 is compulsory.

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What are the types of Specialised Connective Tissues ?

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17.
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AµUS¨§a]°ß ö£õ¸Íõuõµ •UQ¯zxÁzøuU TÖP.
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Give the economic importance of Lac insect.

18. ]ÖSh¼À ©mk® EÔg]PÒ EÒÍÚ. Hß Cøµ¨ø£°À CÀø» ?
Why are Villi present in the intestine and not in the stomach ?

19. E°›°¯À ö\õØPøÍ RÌPõq® ö\õØöÓõhºPÐhß Aøh¯õÍ® PõsP.
(a)]Ö}º uØPõ¼P©õP ÷\ªUP¨£hÀ
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(b)]Ö}º PÈzu¾UPõÚ AÔ¯À ö£¯º

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¤zu¨ø£, ]Ö}º¨ø£, ªUm³›åß, ]Ö}º |õÍ®
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Identify the biological terms given below in the list.

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(a) Temporary storage of urine

(b) Scientific term of urination

[Gall bladder, Urinary bladder, Micturition, Ureters]

20. J¸ ÷£ì ÷©UPº GßÚ ö\´QÓx ?
What does a Pace Maker do ?

21. ì£õg]ß ©ØÖ® •mPÒ GÆÂu® PhØ£g_PÐUS •UQ¯zxÁ® Áõ´¢uøÁ ?
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How are Spongin and Spicules important to a Sponge ?

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22.

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©õv› G¾®¤ß Aø©¨ø£ £h® Áøµ¢x £õP[PøÍU
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Draw and label the structure of a typical Long Bone.

ag 23. Pµ¨£õß §a]ø¯ w[S°› GÚ Hß AøÇUQß÷Óõ® ?
Why do you call Cockroach a pest ?

24. AÚõì÷hõ÷©õ\ì GßÓõÀ GßÚ ?
What is meant by Anastomoses ?

[ v¸¨¦P / Turn over

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£Sv & III / PART - III

SÔ¨¦ : GøÁ÷¯Ý® BÖ ÂÚõUPÐUS Âøh¯ÎUPÄ®. ÂÚõ Gs 33 &US
Pmhõ¯©õP Âøh¯ÎUPÄ®. 6x3=18

Note : Answer any six questions. Question No. 33 is compulsory.

25. J¸ ©õv› •xS|õo°ß £h® Áøµ¢x £õP[PÒ SÔUPÄ®.
Draw and label the parts of a typical Chordate.

26. ]»ÁøP G¤w¼¯[PÒ ö£õ´¯kUQÚõÀ BÚøÁ. Cuß ö£õ¸Ò GßÚ ?
Some Epithelia are pseudostratified. What does this mean ?

27. ªmµÀ ÁõÀÄ ©ØÖ® Aøµa\¢vµ ÁõÀÄPøÍ ÷ÁÖ£kzxP.
Distinguish between Mitral valve and Semi-lunar valve.

28. PhÀ ©mhzvØS ÷©À AvP E¯µzvÀ }sh |õÒ ÁõÇ J¸Á›ß EhÀ GÆÁõÖ
\› ö\´x öPõÒQÓx ?
How the body makes long-term adjustments when living in high altitude ?

29. ¼®¤U ©sh»® Hß Enºa] ‰øÍ GÚ¨£kQÓx ? Auß £SvPøÍU TÖP.
Why the limbic system is called the emotional brain ? Name the parts of it.

30. ìöhzuì÷Põ¨¤ß £¯ßPøÍ Á›ø\¨£kzxP.
Enumerate the uses of Stethoscope.

31. £¯ßu¸® £õUj›¯õøÁ ÷|õ³UQ £õUj›¯õ¼¸¢x ÷ÁÖ£kzxP.
Differentiate between probiotics and pathogenic bacteria.

32. AøhPõzu¾UPõÚ •møhø¯ GÆÁõÖ ÷uº¢öuk¨£õ´ ?
How will you select eggs for hatching ?

33. ©Ûu ‰øÍø¯a _ØÔ²ÒÍ ‰ßÖ £õxPõ¨¦ EøÓPÒ ¯õøÁ ?
What are the three protective coverings of the brain ?

For more Question Papers, Sample Papers, Notes & Syllabus visit Page 6 of 8

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£Sv & IV / PART - IV

SÔ¨¦ : AøÚzx ÂÚõUPÐUS® Âøh¯ÎUPÄ®. 5x5=25

Note : Answer all the questions.

34. (A) ]Ö}µP¨ £oPøÍ ö|Ô£kzx® íõº÷©õøÚa _µ¨£vÀ Cu¯zvß £[øP
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ÂÍUSP. A¢u íõº÷©õÛß ö£¯º GßÚ ?
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(B) \mhP ©sh»zvß £oPÒ ¯õøÁ ?
(a)

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Explain the heart’s role in secreting a hormone that regulates renal function ? What

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hormone is this ?

OR

(b) What are the functions of the Skeletal system ?

35. (A) uÁøÍ°ß ö£s CÚ¨ö£¸UP ©sh»zøu ÂÍUSP.
AÀ»x
(B) _Áõ\¨ £õøuø¯ ÂÍUS® öuõhº ÂÍUP Áøµ£hzøu ÁøµP.
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(a) Explain the female reproductive system of Frog.

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OR

(b)

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Sketch a flow chart to show the pathway of airflow during respiration.

36.
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(A) £õ¿miPÎß ö£õx¨£s¦PøÍ
AÀ»x
(B) PÀ½µ¼À E¸ÁõS® ¤zu }›À ö\›©õÚ ö|õvPÒ Hx® CÀø». BÚõ¾®
ö\›zuÀ \›¯õP |øhö£Ó ¤zu }º AÁ]¯©õQßÓx (SÔ¨£õP öPõʨ¦
ö\›zu¼À). RÌPshÁØøÓ Bµõ¯Ä®.
¤zu }›À EÒÍ ö£õ¸mPÒ ¯õøÁ ?
(i)

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(ii)

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öPõʨ¦ EmQµQzu¼À, ¤zu }º GÆÁõÖ EuÄQßÓx ?
(iii)

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(a) Write in detail the general characteristics of class Mammalia.

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OR

The bile juice of liver has no digestive enzyme. But is very essential for proper digestion

of food, especially, of the fats. Discuss the following.

(i) What is composition of Bile ?

(ii) How it helps in digestion of fats and other nutrients of food ?

(iii) How it helps in absorption of fats ?

[ v¸¨¦P / Turn over

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37. (A) ÷uõ¼À Põn¨£k® Enº÷ÁؤPøÍ ÂÁ›UPÄ®.
AÀ»x
(B) Áͺa] íõº÷©õß C¯À£õÚ EhÀ Áͺa]US •UQ¯©õÚx. CUTØøÓ
{¯õ¯¨£kzuÄ®.
(a) Describe the sensory receptors present in the Skin.

OR

(b) Growth hormone is important for normal growth. Justify the statement.

38. (A) ©Ûu Cu¯zxi¨¦ ÷uõßÓÀ ©ØÖ® Pmk¨£kzxuÀ |øhö£Ö® •øÓø¯
ÂÁ›UPÄ®.
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(B ) «ßPÎß EnÅmh ©v¨¦PÒ ¯õøÁ ?
(a) Describe the mechanism by which the human heartbeat is initiated and controlled.

OR

(b) What are the nutritive values of Fishes ?

- o O o -

.

For more Question Papers, Sample Papers, Notes & Syllabus visit Page 8 of 8