TN 12th Question Paper 2024 Botany

TN PUBLIC EXAM

QUESTION
PAPER
2024

No. of Printed Pages : 11
7432
£vÄ Gs
A Register Number

!7432Botany!
PART - III
uõÁµÂ¯À / BOTANY
( 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¨ £¯ß£kzu
÷Ásk®. £h[PÒ ÁøµÁuØS®, AiU÷PõikÁuØS® 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.

£Sv & I / PART - I
SÔ¨¦ : (i) AøÚzx ÂÚõUPÐUS® Âøh¯ÎUPÄ®. 15x1=15

(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

7432 2

1. •øÍ÷Áº EøÓ Põn¨£k® uõÁµ® :
(A) £mhõo (B) ö|À (C) iøµhõUì (D) ¥ßì
Coleorhiza is found in :
(a) Pea (b) Paddy (c) Tridax (d) Bean

2. RÌUPshÁØøÓ¨ ö£õ¸zxP :

•Ê •vº¢u ö\À «sk® BUSz
(1) (i)
BUSzvÓß v_ÁõP ©õÖuÀ

(2)
ö\ÀPÎß E°› ÷Áv¯ ©ØÖ®
÷ÁÖ£õiÇzuÀ (ii)
Aø©¨¤¯ ©õØÓ[PÒ
•Êz uõÁµ©õP Á͵U Ti¯
(3) ¤›TÖ (iii)
E°¸ÒÍ ö\ÀPÎß £s¦
Áͺ¨¦ FhPzvØS
(4) ÷ÁÖ£õkÖuÀ (iv) ÷uº¢öukzu uõÁµz v_øÁ

©õØÖuÀ
(A) (1)-(ii), (2)-(i), (3)-(iv), (4)-(iii)
(B) (1)-(iii), (2)-(i), (3)-(iv), (4)-(ii)
(C) (1)-(iv), (2)-(ii), (3)-(iii), (4)-(i)
(D) (1)-(i), (2)-(iii), (3)-(ii), (4)-(iv)
Match the following :
Reversion of mature cells into
(1) Totipotency (i)
meristem
Biochemical and structural
(2) Dedifferentiation (ii)
changes of cells
Properties of living cells that
(3) Explant (iii)
develops into entire plant
Selected plant tissue transferred
(4) Differentiation (iv)
to culture medium
(a) (1)-(ii), (2)-(i), (3)-(iv), (4)-(iii)
(b) (1)-(iii), (2)-(i), (3)-(iv), (4)-(ii)
(c) (1)-(iv), (2)-(ii), (3)-(iii), (4)-(i)
(d) (1)-(i), (2)-(iii), (3)-(ii), (4)-(iv)

A

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3. RÌUPshøÁPÎÀ GøÁ `ÇÀ ©sh» ÷\øÁPÎÀ JÊ[S£kzx® ÷\øÁ¯À» ?
(i) ©µ£q ÁÍ[PÒ
(ii) ö£õÊx÷£õUS ©ØÖ® AÇS\õº ©v¨¦PÒ
(iii) Fk¸ÁÀ Gvº¨¦
(iv) Põ»{ø» Pmk¨£õk
(A) (i) ©ØÖ® (ii) (B) (i) ©ØÖ® (iii) (C) (i) ©ØÖ® (iv) (D) (ii) ©ØÖ® (iv)
Which of the following are not regulating services of ecosystem services ?

(i) Genetic resources

(ii) Recreation and aesthetic values

(iii) Invasion resistance

(iv) Climatic regulation

(a) (i) and (ii) (b) (i) and (iii) (c) (i) and (iv) (d) (ii) and (iv)

4. £iö¯kzu¼ß÷£õx CsmµõßPøÍ öÁÎ÷¯ØÔ²®, GU\õßPøÍ ¤ønUS®
ö\¯»õUP® __________ GÚ¨£k®.
(A) yskuÀ (B) Cø¯zuÀ
(C) |ÖUSuÀ (D) ÁøÍÁõUSuÀ
Removal of introns and joining of exons in a defined order during transcription is called :

(a) Inducing (b) Splicing

(c) Slicing (d) Looping

5. ö£¸®£õ»õÚ uõÁµ[PÎÀ ©Pµ¢uzxPÒ öÁÎ÷¯Ö® {ø» :
(A) 3 ö\À {ø» (B) 1 ö\À {ø» (C) 4 ö\À {ø» (D) 2 ö\À {ø»
In majority of the plants, pollen is liberated at :

(a) 3 celled stage (b) 1 celled stage (c) 4 celled stage (d) 2 celled stage

A [ v¸¨¦P / Turn over

7432 4

6. RÌUPsh TØÖPÎÀ Põn¨£k® ÷Põimh Ch[PøÍ \›¯õÚ ÂøhPøÍU
öPõsk §ºzv ö\´P.
(i) ©soÀ Põn¨£k® ö©õzu }º __________.
(ii) uõÁµ[PÐUS¨ £¯ß£hõu }º __________.
(iii) uõÁµ[PÐUS¨ £¯ß£k® }º __________.

(i) (ii) (iii)
(A) Q›ìéõºk GUíõºk íõ»õºk
(B) íõ»õºk GUíõºk Q›ìéõºk
(C) íõ»õºk Q›ìéõºk GUíõºk
(D) GUíõºk íõ»õºk Q›ìéõºk
Read the following statements and fill up the blanks with correct option.
(i) Total water content in soil is called __________.
(ii) Water not available to plants is called __________.
(iii) Water available to plants is called __________.

(i) (ii) (iii)
(a) Chresard Echard Holard
(b) Holard Echard Chresard
(c) Holard Chresard Echard
(d) Echard Holard Chresard

7. TØÖ : ©g\Ò £À÷ÁÖ ¦ØÖ÷|õ´PøÍ GvºUQÓx.
Põµn® : ©g\ÎÀ SºSªß GßÓ Bsi BUêöhsm EÒÍx.
(A) TØÖ, Põµn® & Cµsk® \›
(B) TØÖ \›, Põµn® uÁÖ
(C) TØÖ, Põµn® & Cµsk® uÁÖ
(D) TØÖ uÁÖ, Põµn® \›
Assertion : Turmeric fights various kinds of cancer.
Reason : Curcumin is an anti-oxidant present in turmeric.
(a) Both Assertion and Reason are correct
(b) Assertion is correct, Reason is wrong
(c) Both Assertion and Reason are wrong
(d) Assertion is wrong, Reason is correct

A

5 7432

8. ö©sh¼ß Põ»zvÀ G¢ua ÷\õuøÚ°À F1 \¢uv°ß C¸ ö£Ø÷Óõ›ß £s¦&
PøͲ® öÁΨ£kzx® ?
(A) J¸ ©µ£qÂß £õµ®£›¯® (B) •Êø©ö£Óõ K[Sz ußø©
(C) Cøn K[Sz ußø© (D) K[Sz ußø© Âv
Which Mendelian idea is depicted by a cross in which the F1 generation resembles both the
parents ?
(a) Inheritance of one gene (b) Incomplete dominance
(c) Co-dominance (d) Law of dominance

9. Smøh ©µ£q Eøh¯ ÷Põxø© :
(A) ÷|õ›ß 10 (B) £õÀ I (C) ö£¼hõ 2 (D) A÷hõªhõ I
Dwarfing gene of wheat is :
(a) Norin 10 (b) Pal I (c) Pelita 2 (d) Atomita I

10. C¸£s¦ ÷\õuøÚU P»¨¦ ÂQu® :
(A) 1 : 2 : 1 (B) 9 : 3 : 3 : 1 (C) 1 : 1 (D) 1 : 1 : 1 : 1
Dihybrid test cross ratio is :
(a) 1:2:1 (b) 9:3:3:1 (c) 1:1 (d) 1:1:1:1

11. öµìm›Uåß ö|õvPÒ Gߣx :
(A) ©µ¦¨ ö£õÔ°¯¼À G¨÷£õx® ÷uøÁ¨£kÁvÀø»
(B) ©µ¦¨ ö£õÔ°¯¼À •UQ¯©õÚ P¸Â¯õS®
(C) {³UÎ÷¯ì DNA &øÁU SÔ¨¤mh ChzvÀ xsizuÀ
(-D) (B) ©ØÖ® (C)
Restriction enzymes are :
(a) Not always required in genetic engineering.
(b) Essential tool in genetic engineering.
(c) Nucleases that cleave DNA at specific sites.
(d) Both (b) and (c)

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7432 6

12. AQ» E»P K÷\õß vÚ® :
(A) áüß & 05 (B) ©õºa & 21
(C) ö\¨h®£º & 16 (D) ÷© & 22
The International Ozone day is :

(a) June 05 (b) March 21

(c) September 16 (d) May 22

13. Gzvi¯® ¦÷µõø©k G¢u öuõÈÀ~m£ •øÓ°À £¯ß£kzu¨£kQÓx ?
(A) £õ¼©÷µì \[Q¼z öuõhºÂøÚ
(B) \uºß JØÔö¯k¨¦ öuõÈÀ~m£•øÓ
(C) AP÷µõì CÊ© ªßÚõؤ›¨¦
(D) öÁìhºß JØÔö¯k¨¦ öuõÈÀ~m£•øÓ
In which techniques Ethidium Bromide is used ?

(a) Polymerase Chain Reaction

(b) Southern Blotting Techniques

(c) Agarose Gel Electrophoresis

(d) Western Blotting Techniques

14. 20% ©ØÖ® 60% £_ø© CÀ» Áõ²UPÒ ¦Â öÁ¨£©¯©õu¾USU Põµn©õÚøÁ
•øÓ÷¯ :
(A) CH4 ©ØÖ® CO2 (B) N2O ©ØÖ® CO2
(C) CH4 ©ØÖ® CFCs (D) CFCs ©ØÖ® N2O
One green house gas contributes 20% of total global warming and another contributes 60%.
These are respectively identified as :

(a) CH4 and CO2 (b) N2O and CO2

(c) CH4 and CFCs (d) CFCs and N2O

A

7 7432

15. ö\¯»õUP ‰» ©¸¢x iµõßì&öhmµõ øím÷µõöPßÚõ¤ÚõÀ Gv¾ÒÍx ?

(A) Pg\õ ö\i (B) A¤ß (C) {»÷Á®¦ (D) ©g\Ò
The active principle trans-tetra hydro canabinal is present in :

(a) Marijuana (b) Opium (c) Andrographis (d) Curcuma

£S-v & II / PART - II

SÔ¨¦ : GøÁ- ÷ ¯- Ý ® BÖ ÂÚõU- P - Ð US ©mk® Âøh- ¯ - Î U- P - Ä ®. ÂÚõ Gs
24 &US Pm-hõ-¯-©õP Âøh-¯-ÎU-P-Ä®. 6x2=12

Note : Answer any six questions. Question number 24 is compulsory.

16. ©µ£q ©õØÓzvØS £¯ß£kzu¨£k® ÷Áv¨ ö£õ¸mPÎß ö£¯ºPøÍU TÖP.
Name the chemicals used in gene transfer.

17. ÁoP ÷ÁÍõsPõk Áͺ¨¦ ‰»® ÁͺUP¨£k® |õßS uõÁµ GkzxUPõmk&
PøÍz u¸P.
Give four examples of plants cultivated in commercial agroforestry.

18. uõÁµ[PÍõÀ ^µø©UP¨£kuÀ GßÓõÀ GßÚ ?
What is phytoremediation ?

19. RÌUPsh uµÄPøÍU öPõsk EnÄa \[Q¼ø¯ EshõUSP.

£¸¢x, uõÁµ[PÒ, uÁøÍ, £õ®¦, öÁmkUQÎ
Construct the food chain with the following data.

Hawk, plants, frog, snake, grasshopper

A [ v¸¨¦P / Turn over

7432 8

20. ¤ØP»¨¦ GßÓõÀ GßÚ ?
What is back cross ?

21. h¯õì÷Põ›¯õ GÆÁõÖ uøÇÁÈ CÚ¨ö£¸UP® AøhQÓx ?
How do Dioscorea reproduces vegetatively ?

22. •uÀ {ø» AÔ•P¨£kzuø»²®, Cµshõ® {ø» AÔ•P¨£kzuø»²®
÷ÁÖ£kzxP.
Differentiate between primary introduction and secondary introduction.

23. uÁÖu»õP¨ ö£õ¸Ò£k®, ö£õ¸Ðnºzuõu \kv ©õØÓzvØS Cøh÷¯¯õÚ
÷ÁÖ£õk GßÚ ?
What is the difference between missense and nonsense mutation ?

24. ¤ÍÄ£kzu¨£mh C¸Âøu°ø» Âøu°ß Aø©¨ø£¨ £h® Áøµ¢x £õP®
SÔUPÄ®.
Draw and label the parts of cut opened dicot seed.

£S-v & III / PART - III
SÔ¨¦ : GøÁ- ÷ ¯- Ý ® BÖ ÂÚõU- P - Ð US ©mk® Âøh- ¯ - Î U- P - Ä ®. ÂÚõ
Gs 33 &US Pm-hõ-¯-©õP Âøh-¯-ÎU-P-Ä®. 6x3=18

Note : Answer any six questions. Question number 33 is compulsory.

25. PÛUSÒ Âøu •øÍzuÀ GßÓõÀ GßÚ ? Cx G¢uz uõÁµ ÁS¨¤À Põn¨£k&
QÓx ?
What is vivipary ? Name a plant group which exhibits vivipary.

26. ÷ÁÍõs ÷Áv¨ ö£õ¸mPÒ GßÓõÀ GßÚ ?
What are Agro chemicals ?

A

9 7432

27. xøn £Û©ø»U PõkPÎÀ Põn¨£k® uõÁµ[PÎß ö£¯ºPøÍ GÊxP.

Write the plants that are found in sub-alpine forests.

28. \mhß ©ØÖ® ö£õ÷Á› ÷Põm£õmiß ]Ó¨¦ A®\[PøÍ GÊxP.

Write the salient features of Sutton and Boveri concept.

29. Âøu £µÄu¼ß |ßø©PÒ ¯õøÁ ?

What are the advantages of seed dispersal ?

30. ÷Áva \õ¯zøu ÷£õk® J¸Á¸US G›a\À Á¸QÓx. }[PÒ AuØS ©õÓõP Gøu
]£õ›_ ö\´ÃºPÒ ? Auß £¯ßPÒ H÷uÝ® CµsiøÚ GÊxP.

A person got irritation while applying chemical dye. What would be your suggestion for
alternative ? Write its any two uses.

31. £À÷ÁÖ ÁøP JØÔö¯k¨¦ öuõÈÀ~m£[PøÍ J¨¤kP.

Compare the various types of Blotting techniques.

32. ö©sh»õÀ B´Ä ö\´¯¨£mh HÊ ÷ÁÖ£mh £s¦PøÍU TÖP.

Name the seven contrasting traits studied by Mendel.

33. uõÁµz v_ Áͺ¨¤À ¤›TÖUS ~sq°º }UP® ö\´uÀ £ØÔ ]Ö SÔ¨¦ GÊxP.

Write a short note on Sterilization of Explants in plant tissue culture.

A [ v¸¨¦P / Turn over

7432 10

£S-v & IV / PART - IV
SÔ¨¦ : AøÚz-x ÂÚõU-P-ÐU-S® Âøh-¯-ÎU-P-Ä®. 5x5=25

Note : Answer all the questions.

34. (A) ©ÛuÚõÀ E¸ÁõUP¨£mh uõÛ¯zvß ö£¯øµ GÊxP. Cx GÆÁõÖ
E¸ÁõUP¨£kQÓx ?
AÀ-»-x
(B) K[Q ©øÓzuø» GkzxUPõmkhß ÂÁ›UPÄ®.
(a) Mention the name of man-made cereal. How it is formed ?

OR

(b) Describe dominant epistasis with an example.

35. (A) §a] ©Pµ¢ua ÷\ºUøP ©»ºPÎÀ Põn¨£k® ]Ó¨¤¯À¦PøÍU SÔ¨¤kP.
AÀ-»-x
(B) ¦v¯ PõkPÒ ÷uõØÖÂzu¼À uÛ B´ÄPÒ SÔzx ÂÍUSP.
(a) Enumerate the characteristic features of Entomophilous flowers.

OR

(b) Explain afforestation with case studies.

36. (A) ©s AkUPø©Ä GßÓõÀ GßÚ ? ©soß öÁÆ÷ÁÖ AkUSPøͨ £ØÔ
ÂÁ›UPÄ®.
AÀ-»-x
(B) ÂøuPøÍ AvP |õmPÐUSa ÷\ªzx øÁUS® ÁÈ•øÓPøͨ £mi¯¼kP.
(a) What is soil profile ? Explain about the different soil horizons.

OR

(b) List the ways by which seeds can be stored for longer duration.

A

11 7432

37. (A) ö\¯ØøP Âøu u¯õ›¨£uØPõÚ ö|Ô•øÓPøͲ® Auß |ßø©PøͲ®
ÂÍUP©õP GÊxP.
AÀ-»-x
(B) ©ÖTmiønÄ DNA öuõÈÀ~m£zvß £i{ø»PøÍ GÊxP.
(a) Write in detail about the protocol for artificial seed preparation and its advantages.
OR
(b) Write the steps involved in recombinant DNA technology.

38. (A) •uÀ {ø» ©ØÖ® Cµshõ® {ø» ÁÈ•øÓ Áͺa]PÐUS Cøh÷¯²ÒÍ
÷ÁÖ£õkPøÍ AmhÁøn¨£kzxP.
AÀ-»-x
(B) ³÷P›÷¯õmPÎÀ DNA Cµmi¨£õuø» ÂÍUSP.
(a) Tabulate the differences between primary and secondary succession.
OR
(b) Explain the DNA replication in eukaryotes.

-oOo-

A [ v¸¨¦P / Turn over

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