TN 12th Question Paper 2024 Biology

TN PUBLIC EXAM

QUESTION
PAPER
2024

No. of Printed Pages : 11
7427
£vÄ Gs
A Register Number

!7427Biology! 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 |õßS ©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

7427 2

1. K÷\õÛß ui©øÚ AÍÂk® A»S :
(A) Áõm (B) hõ¨\ß (C) Q÷»õ (D) áüÀ
The unit for measuring ozone thickness is :
(a) Watt (b) Dobson (c) Kilo (d) Joule

2. öÁÒÍ›°ß PÛ {Ó® __________ US Euõµn©õS®.
(A) {µ¨¦ ©µ£qUPÒ (B) Jk[S ©øÓzuÀ
(C) uøh ö\´²® ©µ£qUPÒ (D) K[S ©øÓzuÀ
Fruit colour in squash is an example of :
(a) Complementary genes (b) Recessive epistasis
(c) Inhibitory genes (d) Dominant epistasis

3. ©÷¯õ÷\õmiêß ©Pµ¢u xPÎß AÍÄ __________ ø©U÷µõ «mhº.
(A) 10 (B) 2000 (C) 20 (D) 200
Size of pollen grain in myosotis is __________ micrometer.
(a) 10 (b) 2000 (c) 20 (d) 200

4. TØÖ : Põ©õ PvºPÒ ö£õxÁõPU ÷Põxø© ÁøPPÎÀ \kv ©õØÓzøuz
ysh¨ £¯ß£kQÓx.
Põµn® : HöÚÛÀ Aq¼¸¢x Á¸® G»UmµõßPøÍ A¯Û¯õUP C¯»õu
SøÓÁõÚ BØÓø» Gkzxa ö\ÀQÓx.
(A) TØÖ uÁÖ, Põµn® \›
(B) TØÖ ©ØÖ® Põµn® \›
(C) TØÖ ©ØÖ® Põµn® uÁÖ
(D) TØÖ \›, Põµn® uÁÖ
Assertion (A) : Gamma rays are generally used to induce mutation in wheat varieties.
Reason (R) : Because they carry lower energy to non-ionize electrons from atom.
(a) (A) is wrong, (R) is correct
(b) (A) and (R) are correct
(c) (A) and (R) are wrong
(d) (A) is correct, (R) is wrong

A

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5. JÎa÷\ºUøP \õº ö\¯¿UP PvºÃa]ß Aø»}Í® CÁØÔØQøh¨£mhuõS®.
(A) 200 - 700 nm (B) 300 - 700 nm (C) 500 - 700 nm (D) 400 - 700 nm
The wavelength of photosynthetically active radiation lies between the range of :
(a) 200 - 700 nm (b) 300 - 700 nm (c) 500 - 700 nm (d) 400 - 700 nm

6. ö£õ¸zxP.
Á›ø\ - I Á›ø\ - II
(1) Põµõ©o (i) §\õ \h£íº
(2) ÷Põxø© (ii) §\õ _ÁºÛ®
(3) ªÍPõ´ (iii) î®Q›
(4) ¤µõ]Põ (iv) §\õ ÷Põ©À
(A) (1)-(iv), (2)-(i), (3)-(ii), (4)-(iii)
(B) (1)-(ii), (2)-(iv), (3)-(i), (4)-(iii)
(C) (1)-(ii), (2)-(i), (3)-(iv), (4)-(iii)
(D) (1)-(iv), (2)-(iii), (3)-(i), (4)-(ii)
Match the following :
Column - I Column - II
(1) Cowpea (i) Pusa Sadabahar
(2) Wheat (ii) Pusa Swarnim
(3) Chilli (iii) Himgiri
(4) Brassica (iv) Pusa Komal
(a) (1)-(iv), (2)-(i), (3)-(ii), (4)-(iii)
(b) (1)-(ii), (2)-(iv), (3)-(i), (4)-(iii)
(c) (1)-(ii), (2)-(i), (3)-(iv), (4)-(iii)
(d) (1)-(iv), (2)-(iii), (3)-(i), (4)-(ii)

7. ÷ÁºUPhø»°ß ¤Ó¨¤h® :
(A) Áh Aö©›UPõ (B) ¤¼¨ø£ßì
(C) ¤÷µ]À (D) C¢v¯õ
The native of groundnut is :
(a) North America (b) Philippines
(c) Brazil (d) India

A [ v¸¨¦P / Turn over

7427 4

8. ¤Íõìªm Gߣx :
(A) ~so¯ £õUj›¯[PÒ
(B) Ámh ÁiÁ ¦µu ‰»UTÖPÒ
(C) E°› Gvº¨ö£õ¸ÐUS uk¨ø£ ÁÇ[SÁx
(D) £õUj›¯õÂØS ÷uøÁ¨£kÁx
Plasmids are :
(a) tiny bacteria
(b) circular protein molecules
(c) confer resistance to antibiotics
(d) required by bacteria

¤›Ä & 2 / SECTION - 2

SÔ¨¦ : RÌPõq® ÂÚõUPÎÀ H÷uÝ® |õßS ÂÚõU-P-ÐUS Âøh-¯-ÎU-P-Ä®. 4x2=8

Note : Answer any four of the following questions.

9. ö©sh¼¯zøu ©Ö B´Ä ö\´u AÔ¯À AÔbºPÎß ö£¯ºPøÍ GÊxP.
Give the names of the scientists who rediscovered Mendelism.

10. uõÁµ[PÍõÀ ^µø©UP¨£kuÀ GßÓõÀ GßÚ ?
What is called phyto remediation ?

11. ©µ£q¨ ö£õÔ°¯¼À ÷uøÁ¨£k® ªP •UQ¯ ö|õvPÎß ö£¯ºPøÍU
SÔ¨¤kP.
Mention the names of the enzymes required for Genetic engineering.

12. P¸ÄÖUPÒ GßÓõÀ GßÚ ?
What are embryoids ?

A

5 7427

13. BØÓÀ ¤µªm G¨ö£õÊx® ÷|µõÚx. Põµn® TÖP.
Pyramid of energy is always upright. Give reasons.

14. ©s ÁÍzøu ÷©®£kzxÁvÀ ~sq°› & Emö\¾zvPÒ GÆÁõÖ £¯ß£k&
QßÓÚ ?
How are microbial inoculants used to increase the soil fertility ?

¤›Ä & 3 / SECTION - 3

SÔ¨¦ : RÌUPõq® ÂÚõUPÎÀ H÷u-Ý® ‰ßÖ ÂÚõU-P-ÐUS Âøh-¯-ÎU-P-Ä®.
ÂÚõ Gs 19 &US Pm-hõ-¯-©õP Âøh-¯-ÎU-P-Ä®. 3x3=9

Note : Answer any three of the following questions. Q. No. 19 is compulsory.

15. ©µ£q Áøµ£h® GßÓõÀ GßÚ ? Auß £¯ßPøÍ GÊxP.
What is genetic mapping ? Write its uses.

16. EøÓ Sκ £õxPõ¨¦ £ØÔ GÊxP.
Give an account on Cryopreservation.

17. ¦Â ÁõÈh® ©ØÖ® ö\¯À ÁõÈh® ÷ÁÖ£kzxP.
Distinguish between habitat and niche.

18. Põ»{ø»°øÚ {ºÁQ¨£vÀ PõkPÒ GÆÁõÖ Eu ¦›QßÓÚ ?
How do forests help in maintaining the climate ?

19. `¼ß Aø©¨¤øÚ £h® Áøµ¢x, £õP[PøÍU SÔUPÄ®.
Draw the structure of an ovule and label its parts.

A [ v¸¨¦P / Turn over

7427 6

¤›Ä & 4 / SECTION - 4

SÔ¨¦ : AøÚz-x ÂÚõU-P-ÐU-S® Âøh-¯-ÎU-P-Ä®. 2x5=10

Note : Answer all the questions.

20. (A) uÛö\À ¦µu® GßÓõÀ GßÚ ? AÁØÔß £¯ß£õkPøÍ GÊxP.

AÀ-»-x

(B) ]Ö uõÛ¯[PÒ GßÓõÀ GßÚ ? AuÝøh¯ ÁøPPÒ ¯õøÁ ? JÆöÁõßÔØS®
GkzxUPõmk u¸P.

(a) What is single cell protein ? Mention its applications.

OR

(b) What are Millets ? What are its types ? Give an example for each type.

21. (A) £_[PoP ©µ£q \õº¢u £õµ®£›¯zøu GkzxUPõmkhß öÁÎU öPõnºP.

AÀ-»-x

(B) ~sÂzx¸ÁõUPzv¾ÒÍ £i{ø»PøÍ ÂÁõvUPÄ®.

(a) Bring out the inheritance of chloroplast gene with an example.

OR

(b) Discuss the steps involved in the microsporogenesis.

A

7 7427

£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 |õßS ©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. Bsm÷µõáß CønĨ ¦µuzøu EØ£zv ö\´£øÁ :
(A) ö\º÷hõ¼ ö\ÀPÒ (B) ½iU ö\ÀPÒ
(C) ¤m³mh› _µ¨¤ (D) øí÷£õu»õ©ì
The Androgen Binding Protein (ABP) is produced by :
(a) Sertoli cells (b) Leydig cells
(c) Pituitary gland (d) Hypothalamus

2. EÔg_ «ÝUS® _Óõ «ÝUS® EÒÍ öuõhº¦ :
(A) EuÂö£Ö® ÁõÌUøP (B) Jmkso ÁõÌUøP
(C) ÷Ámøh¯õk® ÁõÌUøP (D) ÷£õmi
The relationship between sucker fish and shark is :
(a) Commensalism (b) Parasitism
(c) Predation (d) Competition

3. CÍ® E°› PßÛ CÚ¨ö£¸UP® |øhö£Ö® E°› :
(A) ö\õ¼÷Úõ¤¯õ (B) GL¤ì
(C) ö©õÊUS D (D) ÷uÜUPÒ
Paedogenetic parthenogenesis occurs in :
(a) Solenobia (b) Aphis
(c) Gall fly (d) Honey bees

A [ v¸¨¦P / Turn over

7427 8

4. hÄß ]sm÷µõ® Gߣx J¸ ©µ¤¯À SøÓ£õk BS®. Cx G¢u S÷µõ÷©õ&
÷\õªß GsoUøP TkuÀ Põµn©õP HØ£kQÓx ?
(A) 13 (B) 20 (C) 23 (D) 21
Down's Syndrome is a genetic disorder which is caused by the presence of an extra
chromosome number :
(a) 13 (b) 20 (c) 23 (d) 21

5. ¤Íõì÷©õi¯zvß ¦Óa]Á¨£q ø\÷åõ÷PõÛ |øhö£Ö® Ch® :
(A) Cøµ¨ø£ (B) Cµzu ]Á¨£q
(C) PÀ½µÀ (D) ¼³U÷Põø\mkPÒ
Exo-erythrocytic schizogony of Plasmodium takes place in :
(a) Stomach (b) RBC
(c) Liver (d) Leucocytes

6. "E°ºÁÈz ÷uõØÓU ÷Põm£õk' GßÓ ö\õÀø» E¸ÁõUQ¯Áº :
(A) J¨£õ›ß (B) uõ©ì íUì÷»
(C) íõÀ÷hß (D) öíßÔ £õìi¯ß
The term 'Biogenesis' was coined by :
(a) Oparin (b) Thomas Huxley
(c) Haldane (d) Henry Bastian

7. 1973 &B® Bsk __________ ©õ{»zvÀ EÒÍ â® Põºö£m ÷u]¯ §[PõÂÀ
¦¼PÒ vmh® öuõh[P¨£mhx.
(A) A\õ® (B) EzuµPõsm (C) ÷PµÍõ (D) Sáµõz
Project Tiger was launched in the Jim Corbett National Park in the State of __________ in
1973.
(a) Assam (b) Uttarakhand (c) Kerala (d) Gujarat

8. Ai÷Úõ]ß iAª÷Úì £ØÓõUSøÓ°ÚõÀ HØ£kÁx :
(A) SCID (B) ï÷©õL¥¼¯õ
(C) öí¨£õøhiì (D) G´mì
Adenosine deaminase deficiency causes :
(a) SCID (b) Haemophilia
(c) Hepatitis (d) AIDS

A

9 7427

¤›Ä & 2 / SECTION - 2

SÔ¨¦ : H÷uÝ® |õßS ÂÚõU-P-ÐUS ©mk® Âøh-¯-ÎU-P-Ä®. 4x2=8

Note : Answer any four of the following questions.

9. ©Ûu ©µ£q öuõSvz vmhzvß C»USPÒ H÷uÝ® CµsiøÚU SÔ¨¤kP.

Mention any two goals of the human genome project.

10. SÖvÓøÚ GkzxUPõmkhß Áøµ¯ÖUPÄ®.

Define Oligopotency with an example.

11. ©Ûu Ash ö\À¼ß öuÎÁõÚ £h® Áøµ¢x £õP[PøÍU SÔUPÄ®.

Draw a neat labelled sketch of Human Ovum.

12. öuõÈÀxøÓ BÀPíõÀ GÚU SÔ¨¤h¨£kÁx ¯õx ? AuøÚ AÆÁõÖ
SÔ¨¤hU Põµn® GßÚ ?

Which is referred as Industrial alcohol ? Why is it referred so ?

13. \«º GßÓõÀ GßÚ ?

What is meant by Sameer ?

14. P¸¨ø£Áõ´ ¦ØÖ ÷|õø¯ E¸ÁõUS® PõµoPøÍ GÊxP.

Write the risk factors for cervical cancer.

A [ v¸¨¦P / Turn over

7427 10

¤›Ä & 3 / SECTION - 3

SÔ¨¦ : H÷u- Ý ® ‰ßÖ ÂÚõU- P - Ð US Âøh- ¯ - Î U- P - Ä ®. ÂÚõ Gs 19 &US
Pm-hõ-¯-©õP Âøh-¯-ÎU-P-Ä®. 3x3=9

Note : Answer any three questions. Q. No. 19 is compulsory.

15. ÷Põ¨÷µõø»mkPÒ £ØÔ ]Ö SÔ¨¦ GÊxP.

Write a short note on Coprolites.

16. uõ´&÷\´ Cøn¨¦z v_ J¸ |õͪÀ»õa _µ¨¤z v_ & {¯õ¯¨£kzxP.

Placenta is an endocrine tissue - Justify.

17. Asø©U Põ»[PÎÀ ªßÚqU PÈÄPÒ _ØÖa`ǾUS Pkø©¯õÚ
B£zxPøÍ ÂøÍÂUQßÓÚ. CUPÈÄPÍõÀ HØ£k® £õv¨¦PøÍz uºUP
GÆÁõÖ wºÄ Põs£õ´ ?

Recently E-waste created dangerous effects in the environment. How will you find solution
to avoid the effects due to these wastes ?

18. r-÷uºÄ ö\´u ©ØÖ® K - ÷uºÄ ö\´u ]ØÔÚ[PÐUQøh÷¯ EÒÍ ÷ÁÖ£õkPøÍ
GÊxP.

Write the differences between r-selected and K-selected species.

19. PCR - G¢u {PÌÂß ‰»® RNA |PÀ ö£¸UPzvØS EuÄQÓx ? A¢u {PÌÂøÚ¨
£ØÔ¯ ÷Áv°¯À ö\¯ø» _¸UP©õP GÊxP.

By which event PCR help in RNA replication ? Write in brief about the chemical reaction of
that process.

A

11 7427

¤›Ä & 4 / SECTION - 4
SÔ¨¦ : AøÚz-x ÂÚõU-P-ÐU-S® Âøh-¯-ÎU-P-Ä®. 2x5=10

Note : Answer all the questions.

20. (A) E°›¯¨ £ÀÁøPz ußø©°ß £õxPõ¨ø£ ÷©®£kzxÁuØS |õ® GÆÁõÖ
£[PÎUP •i²® ?
AÀ-»-x
(B) £›nõ©zvÀ, íõºi&Ãßö£ºU Âv°ß FP[PÒ ¯õøÁ ? ÂÍUSP.
(a) How can we contribute to promote biodiversity conservation ?
OR
(b) What are Hardy-Weinberg's assumptions on evolution ? Explain them.

21. (A) ÷£õøu ©¸¢xPøÍ Auß ÂøÍÄPÎß Ai¨£øh°À ÁøP¨£kzxP.
AÀ-»-x
(B) E°›PÎÀ Põn¨£k® £À÷ÁÖ ÁøP¯õÚ J¸[QønÄ •øÓPøÍ
ÂÁ›UPÄ®.
(a) Classify the drugs on the basis of their effects.
OR
(b) Explain the different kinds of syngamy in living organisms.

-oOo-

A [ v¸¨¦P / Turn over

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