TN 11th Question Paper 2023 Biology

Tamil Nadu
State Board

2023
QUESTION
PAPER

No. of Printed Pages : 12
6727
£vÄ Gs
A Register Number

!6727IstYearBiology! PART - III
E°›¯À / BIOLOGY
( uªÌ ©ØÖ® B[Q» ÁÈ / Tamil & English Version)

Põ» AÍÄ : 3.00 ©o ÷|µ® ] [ ö©õzu ©v¨ö£sPÒ : 70
Time Allowed : 3.00 Hours ] [Maximum Marks : 70

AÔÄøµPÒ : (1) AøÚzx ÂÚõUPЮ \›¯õP £vÁõQ EÒÍuõ GߣuøÚ \›£õºzxU
öPõÒÍÄ®. Aa_¨£vÂÀ SøÓ°¸¨¤ß AøÓU PsPõo¨£õÍ›h®
EhÚi¯õPz öu›ÂUPÄ®.
(2) }»® AÀ»x P¸¨¦ ø©°øÚ ©mk÷© GÊxÁuØS®
AiU÷PõikÁuØS® £¯ß£kzu ÷Ásk®. £h[PÒ ÁøµÁuØS
ö£ß]À £¯ß£kzuÄ®.
Instructions : (1) 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.

SÔ¨¦ : £Sv&I (E°›&uõÁµÂ¯À), £Sv&II (E°›&»[Q¯À) uÛzuÛ ÂøhzuõÎÀ
Âøh¯ÎUPÄ®.
Note : Candidate should answer Part-I (Bio-Botany) & Part-II (Bio-Zoology) in separate
answer books.
£Sv - I (E°›&uõÁµÂ¯À) / PART - I (BIO-BOTANY)
(©v¨ö£sPÒ : 35) / (Marks : 35)

¤›Ä - 1 / SECTION - 1

SÔ¨¦ : (i) AøÚzx ÂÚõUPÐUS® Âøh¯ÎUPÄ®. 8x1=8
(ii) öPõkUP¨£mkÒÍ ©õØÖ ÂøhPÎÀ ªPÄ® Hئøh¯ Âøhø¯z
÷uº¢öukzxU SÔ±mkhß Âøh°øÚ²® ÷\ºzx GÊuÄ®.
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

6727 2

1. ö\ßm÷µõª¯º __________ US ÷uøÁ¨£kQÓx.

(A) ø\m÷hõ¤Íõ\® ¤ÍÄÖuÀ

(B) £iö¯kzuÀ

(C) S÷µõ÷©õ÷\õ®PøÍ x¸Á¨£Sv ÷|õUQ |PºzxuÀ

(D) SÖU÷P P»zuÀ

Centromere is required for __________.

(a) Cytoplasmic cleavage

(b) Transcription

(c) Movement of chromosomes towards pole

(d) Crossing over

2. \›¯õP¨ ö£õ¸¢v¯ Cønø¯U PshÔP.

(A) £õUj›¯[PÒ & ~ÛUPÇø» ÷|õ´

(B) BUj÷Úõø©^mPÒ & uõ©vzu öÁ¨¦ ÷|õ´

(C) §gø\PÒ & \¢uÚU Tº ~Û ÷|õ´

(D) ø©U÷Põ¤Íõì©õ & PÇø»z uõøh ÷|õ´

Identify the correctly matched pair :

(a) Bacteria - Crown gall

(b) Actinomycetes - Late blight

(c) Fungi - Sandal spike

(d) Mycoplasma - Lumpy jaw

A

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3. Cø»zxøÍz vÓ¨¦ Gøua \õº¢ux ?
(A) S÷Íõøµk A¯Û°ß EÒ~øÇÄ
(B) ö£õmhõ]¯® A¯Û°ß EÒ~øÇÄ
(C) øímµõUêÀ A¯Û°ß EÒ~øÇÄ
(D) ö£õmhõ]¯® A¯Û°ß öÁÎ÷¯ØÓ®
Stomata of a plant open due to :

(a) Influx of Cl−

(b) Influx of K+

(c) Influx of OH−

(d) Efflux of K+

4. ¤ßÁ¸® G¢u JÎ Aø»}ÍzvÀ JÎa÷\ºUøP Ãu® AvP©õP C¸US® ?
(A) 400 •uÀ 700 nm (B) 200 •uÀ 400 nm
(C) 500 •uÀ 800 nm (D) 300 •uÀ 500 nm
In which of the following wavelength the rate of photosynthesis is high ?

(a) 400 to 700 nm (b) 200 to 400 nm

(c) 500 to 800 nm (d) 300 to 500 nm

5. £À÷ÁÖ ÁøP¨£mh uõÁµ ÷|õö¯vº¨¦ ©sh»zvß JØÖø©PÒ ©ØÖ®
÷ÁØÖø©PÒ Ah[Q¯ ÁøP¨£õk :
(A) F}º\õº ÁøP¨£õk (B) ÷Áv¯ ÁøP¨£õk
(C) Gso¯À ÁøP¨£õk (D) ‰»UTÖ ÁøP¨£õk Aø©¨¦ •øÓ
The taxonomy which involves the similarities and dissimilarities among the immune
system of different taxa is termed as :

(a) Serotaxonomy (b) Chemotaxonomy

(c) Numerical taxonomy (d) Molecular systematics

A [ v¸¨¦P / Turn over

6727 4

6. ¤ßÁ¸ÁÚÁØÔÀ £P»ÍÄ \õµõ uõÁµ[PøÍ ÷uº¢öukUPÄ®.
(A) ¦øP°ø», ÷\õ¯õ ö©õaø\, ö|À
(B) £mhõo, £õº¼, Kmì
(C) Kmì, PõU¼£º, ÷µõ÷hõöhsmµõß
(D) E¸øÍ, uUPõÎ, £¸zv
Select the Day neutral plants from the following :

(a) Tobacco, Soyabean, Rice

(b) Pea, Barley, Oats

(c) Oats, Cocklebur, Rhododendron

(d) Potato, Tomato, Cotton

7. ÁÇUP©õPU S¨¤ uUøP Gv¼¸¢x u¯õ›UP¨£kQÓx ?
(A) ø\»® (B) Lö£À»®
(C) ÁõìS»U ÷P®¤¯® (D) Lö£À÷»õáß
The common bottle cork is a product of :

(a) Xylem (b) Phellem

(c) Vascular cambium (d) Phellogen

8. ¤øµ÷¯õL¤À»® ©ØÖ® h¯õì÷Põ›¯õ BQ¯øÁ GuØS GkzxUPõmk ?
(A) usk ö©õmk, ~Û ö©õmk
(B) Cø» ö©õmk, ~Û ö©õmk
(C) usk ö©õmk, Cø» ö©õmk
(D) Cø» ö©õmk, usk ö©õmk
Bryophyllum and Dioscorea are examples for :

(a) Cauline bud, apical bud

(b) Foliar bud, apical bud

(c) Cauline bud, foliar bud

(d) Foliar bud, cauline bud

A

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¤›Ä & 2 / SECTION - 2

SÔ¨¦ : GøÁ÷¯Ý® |õßS ÂÚõUPÐUS Âøh¯ÎUPÄ®. 4x2=8

Note : Answer any four questions.

9. ¨öÍU÷hõìjÀ GßÓõÀ GßÚ ? Kº GkzxUPõmk u¸P.

What is plectostele ? Give an example.

10. TmkUPÛø¯, vµÒPÛ°¼¸¢x ÷ÁÖ£kzxP.

Differentiate between aggregate fruit and multiple fruit.

11. Fk¸ÁÀ ªßÚq ~s÷nõUQ°ß •UQ¯zxÁzøuU TÖP.

Bring out the significance of Transmission Electron Microscope.

12. H÷uÝ® Cµsk ö|õvPøÍ GÊv Auß ‰»õuõµ® ©ØÖ® £¯ß£õkPøÍ GÊxP.

Write any two Enzymes and their sources and uses.

13. xøÍUPmøhUS®, xøÍPÍØÓ PmøhUS® Cøh÷¯¯õÚ ÷ÁÖ£õkPÒ ¯õøÁ ?

What are the differences between Porous wood and Non-porous wood ?

14. ø|mµáß, ÁΩsh»zvÀ AvP® C¸¢uõ¾®, uõÁµ[PÒ AuøÚ¨ £¯ß£kzu
•iÁvÀø». Hß ?

The nitrogen is present in the atmosphere in huge amount but higher plants fail
to utilize it. Why ?

A [ v¸¨¦P / Turn over

6727 6

¤›Ä & 3 / SECTION - 3

SÔ¨¦ : GøÁ÷¯Ý® ‰ßÖ ÂÚõUPÐUS Âøh¯ÎUPÄ®. ÂÚõ Gs 19 &US
Pmhõ¯©õP Âøh¯ÎUPÄ®. 3x3=9

Note : Answer any three questions. Question No. 19 is Compulsory.

15. I®ö£¸® ¤›Ä ÁøP¨£õmiß {øÓ, SøÓPøͨ £ØÔ SÔ¨¦ ÷\ºUPÄ®.

Add a note on merits and demerits of Five Kingdom classification.

16. ]Ö SÔ¨¦ ÁøµP – ö|¨£¢uì.

Write short notes on Nepenthes.

17. Cø»zxøÍ°ß Aø©¨ø£ £h® Áøµ¢x £õP[PøÍU SÔ¨¤kP.

Draw a neat labelled diagram of stomata.

18. vmhªmh ö\À CÓ¨¦ £ØÔ ]Ö SÔ¨¦ GÊxP.

Give a brief account on Programmed Cell Death (PCD).

19. ÂÍUS y›øP S÷µõ÷©õ÷\õ®PøÍ £hzxhß ÂÁ›UPÄ®.

Describe lamp-brush chromosomes with a neat diagram.

A

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¤›Ä & 4 / SECTION - 4

SÔ¨¦ : AøÚzx ÂÚõUPÐUS® Âøh¯ÎUPÄ®. 2x5=10

Note : Answer all the questions.

20. (A) QøÍm÷hõ›¯õ öhº÷Úæ¯õÂß ©»º £s¦PøÍ ÂÁ›UPÄ®.

AÀ»x

(B) §gø\PÎß ö£õ¸Íõuõµ¨ £¯ßPøÍ GÊxP.

(a) Describe the floral characters of Clitoria ternatea.

OR

(b) Write the economic importance of Fungi.

21. (A) C¸Âøu°ø» ÷Á¸US®, J¸Âøu°ø» ÷Á¸US® Cøh÷¯ EÒÍ
EÒÍø©¨¤¯À ÷ÁÖ£õkPøÍ GÊxP.

AÀ»x

(B) ÷PÚõ[Qß ÷£õm÷hõ«mhº Aø©¨ø£¨ £hzxhß ÂÍUSP.

(a) Write the differences between Anatomy of Dicot root and Monocot root.

OR

(b) Describe the structure of Ganong’s potometer with a neat diagram.

A [ v¸¨¦P / Turn over

6727 8

£Sv & II (E°›&»[Q¯À) / PART - II (BIO-ZOOLOGY)
(©v¨ö£sPÒ : 35) / (Marks : 35)
¤›-Ä & 1 / SECTION - 1
SÔ¨¦ : (i) AøÚzx ÂÚõUPÐUS® Âøh¯ÎUPÄ®. 8x1=8
(ii) öPõkUP¨£mkÒÍ ©õØÖ ÂøhPÎÀ ªPÄ® Hئøh¯ Âøhø¯z
÷uº¢öukzxU SÔ±mkhß Âøh°øÚ²® ÷\ºzx GÊuÄ®.
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.

1. ©s¦ÊUPÎß £õÀ ußø© :
(A) _¯UP¸ÄÖuÀ öPõsh C¸£õÀ E°›PÒ
(B) uÛ¨£õÀ E°›PÒ
(C) PßÛ CÚ¨ö£¸UP E°›PÒ
(D) C¸£õÀ E°›PÒ BÚõÀ _¯P¸ÄÖuÀ CÀø»
Sexually, earthworms are :
(a) Hermaphroditic and self-fertilizing
(b) Sexes are separate
(c) Parthenogenic
(d) Hermaphroditic but not self-fertilizing

2. ^µØÓ uø\ ÷©kPøÍ }m]PÍõPU öPõskÒÍ öÁßi›UQÎß ©÷¯õPõºi¯À
uø\PÐUS __________ GßÖ ö£¯º.
(A) Põº÷h öhßi÷Ú (B) îìêß PØøÓ
(C) AÚõì÷hõ÷©õ\ì (D) £ºQßâ CøÇPÒ
The myocardium of the ventricle is thrown into irregular muscular ridges
called :
(a) Chordae tendinae (b) Bundle of His
(c) Anastomoses (d) Purkinje fibres

3. hõm÷hõøÚª GߣuØS Euõµn® __________.
(A) Lö£¼ì ]ÀÁìm›ì (B) |õáõ |õáõ
(C) A´¿µì L£Àáßì (D) Lö£¼ì öhõ©ìiUPõ
An example for Tautonymy :

(a) Felis silvestris (b) Naja naja
(c) Ailurus fulgens (d) Felis domestica

A

9 6727

4. Áͺa] íõº÷©õß ªøP _µ¨£õÀ SÇ¢øuPÐUSz ÷uõßÖÁx :
(A) Q÷µÂß ÷|õ´ (B) Q›iÛ\®
(C) öhmhÛ (D) Cµõm\uzußø©
Hypersecretion of Growth hormone in children leads to :
(a) Grave’s disease (b) Cretinism
(c) Tetany (d) Gigantism

5. Sa] ö\ÀPÒ AvP©õP EÒÍ Ch® __________.
(A) £õºøÁ |µ®¦ (B) S¸mk ¦ÒÎ
(C) L÷£õ¯õøÁ `Ì¢xÒÍ £Sv (D) IŸì
Rod cells are predominant in the __________.
(a) Optic nerve (b) Blind spot
(c) Extra fovea region (d) Iris

6. PõÀPÍØÓ C¸ÁõÌ :
(A) µõÚõ (B) \»©õshº
(C) CUv÷¯õL¤ì (D) øí»õ
The limbless amphibian is :
(a) Rana (b) Salamander
(c) Icthyophis (d) Hyla

7. ø\÷Úõ¯À vµÁ® Põn¨£k® Ch® __________.
(A) Aø\¯õ ‰mkPÒ (B) ‰øÍ°ß öÁßm›UQÒPÒ
(C) |ßS Aø\²® ‰mkPÒ (D) uskÁh®
Synovial fluid is found in __________.
(a) Immovable joints (b) Ventricles of the brain
(c) Freely movable joints (d) Spinal cord

8. J¸ \õuõµn ©ÛuÛß ‰a_UPõØÖ AÍÄ __________ BS®.
(A) 500 ª.¼. (B) 800 ª.¼.
(C) 1100 - 1200 ª.¼. (D) 1200 ª.¼.
The Tidal Volume of a normal person is __________.

(a) 500 mL (b) 800 mL
(c) 1100 - 1200 mL (d) 1200 mL

A [ v¸¨¦P / Turn over

6727 10

¤›Ä & 2 / SECTION - 2

SÔ¨¦ : GøÁ÷¯Ý® |õßS ÂÚõUPÐUS Âøh¯ÎUPÄ®. 4x2=8

Note : Answer any four questions.

9. GUìm›÷©õLø£Àì Gߣøu Áøµ¯ÖUPÄ®.

Define extremophiles.

10. |õ[TÌ PmiPÒ Gߣx GßÚ ?

What are earthworm casts ?

11. umøh¨ ¦Ê, Pµ¨£õß §a], «ß ©ØÖ® §øÚ BQ¯ÁØÔß _Áõ\ EÖ¨¦PÎß
ö£¯ºPøÍU TÖP.

Name the respiratory organs of Flatworm, Cockroach, Fish and Cat.

12. ‰i¯ ©ØÖ® vÓ¢u ÁøP Cµzu Kmh ©sh»zøu J¨¤kP.

Compare closed and opened circulatory system.

13. ‰øÍU Px¨¦PÎß £oPøÍ AmhÁøn¨£kzxP.

Tabulate the functions of brain lobes.

14. EªÌ }ºa_µ¨¤PÎß £À÷ÁÖ ÁøPPøÍ GÊxP.

Write the different types of salivary glands.

A

11 6727

¤›Ä & 3 / SECTION - 3

SÔ¨¦ : GøÁ÷¯Ý® ‰ßÖ ÂÚõUPÐUS Âøh¯ÎUPÄ®. ÂÚõ Gs 19 &US
Pmhõ¯©õP Âøh¯ÎUPÄ®. 3x3=9

Note : Answer any three questions. Question No. 19 is Compulsory.

15. £õµõøuµõ´k íõº÷©õß SøÓÁvÚõÀ HØ£k® ÷|õ´ ©ØÖ® Auß AÔSÔPøÍ
GÊxP.

Name the disorder caused due to the hyposecretion of parathyroid hormone and
write its symptoms.

16. ö|L¨µõÛß Aø©¨ø£¨ £h® Áøµ¢x £õP[PøÍU SÔUPÄ®.

Draw and label the structure of a Nephron.

17. ]»ÁøP G¤w¼¯[PÒ ö£õ´¯kUQÚõÀ BÚøÁ. Cuß ö£õ¸Ò GßÚ ?

Some epithelial cells are pseudostratified. What does this mean ?

18. AµUS¨§a]°ß ö£õ¸Íõuõµ •UQ¯zxÁzøuU TÖP.

Give the economic importance of lac insect.

19. •ßPs vµÁ® Ps EÒ AÊzuzøu {ø»¯õP¨ £µõ©›UP EuÄQÓx & {¯õ¯¨&
£kzxP.

Aqueous humour maintains the intra-ocular pressure - Justify.

A [ v¸¨¦P / Turn over

6727 12

¤›Ä & 4 / SECTION - 4

SÔ¨¦ : AøÚzx ÂÚõUPÐUS® Âøh¯ÎUPÄ®. 2x5=10

Note : Answer all the questions.

20. (A) Cu¯z xi¨¦ ÷uõßÓÀ ©ØÖ® £µÄ® ÂuzvøÚ ÂÍUSP.

AÀ»x

(B) £À÷ÁÖ £õµ®£›¯ ÁøP¨£õmk P¸ÂPÒ ¯õøÁ ? ÂÍUSP.

(a) Explain the origin and conduction of Heart Beat.

OR

(b) What are the various classical taxonomical tools ? Explain.

21. (A) \mhP ©sh»zvß £À÷ÁÖ £oPøͨ £mi¯¼kP.

AÀ»x

(B) «ßPÒ ©ÛuÛß EnÅmhz ÷uøÁUPõÚ ¤µuõÚ EnÁõS®. «ßPÎÀ
C¸¢x QøhUS® ]» E£ö£õ¸ÒPøͨ £ØÔ ÂÁõvUPÄ®.

(a) List out the various functions of skeletal system.

OR

(b) Fishes provide a good staple food to tide over the nutritional needs of man.
Discuss the various fish by-products.

-o0o-

A