TN 12th Question Paper 2022 Botany

No. of Printed Pages : 11
5932
£vÄ Gs
A Register Number

!5932Botany!
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 ©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

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1. DNA TÔß Ch-©õØ-Ö® vÓ-ÝUS GßÚ ö£¯º ?

(A) Csm-µõß (B) öµU-Põß

(C) ]ìm-µõß (D) iµõßì-÷£õ-\õß

DNA element, which has ability to change its position is called :

(a) Intron (b) Recon

(c) Cistron (d) Transposon

2. Áͺ¨¦ Fh-Pz-vÀ øÁzx ÁͺU-Pz ÷uøÁ¨-£-k® uõ-Á-µz v_ :

(A) P¸-Ä-¸ (B) ÷P-»ì (C) |õØ-Ö-¸ (D) ¤›-T-Ö

The selected tissue to establish a new plant in a culture medium :

(a) Embryoid (b) Callus (c) Plantlets (d) Explant

3. öuõ-hU-PU SÔ-¯ß Gß-£x :

(A) AUG (B) UUU (C) UAG (D) UGA

Initiation codon is :

(a) AUG (b) UUU (c) UAG (d) UGA

A

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4. PõÍõß Áͺ¨¦ £ØÔ¯ ¤ß-Á-¸® Cøn-P-øÍ ö£õ-¸z-x-P.
(1) øÁU-÷Põ-¼ß AÍ-Ä (i) 20 ö\.«.

(2) öuõ-S-v-P-ÐU-Q-øh-÷¯-¯õÚ yµ® (ii) 75 - 85%

(3) AÖ-Áøh ö\´-²® ÷£õx PõÍõß (iii) 2 - 4 A[-S-»®

Søh-°ß AÍ-Ä
(4) Dµ¨-£-u® (iv) 10 - 12 ö\.«.

(A) (1)-(iii), (2)-(iv), (3)-(i), (4)-(ii)
(B) (1)-(ii), (2)-(iv), (3)-(i), (4)-(iii)
(C) (1)-(iv), (2)-(iii), (3)-(ii), (4)-(i)
(D) (1)-(iii), (2)-(i), (3)-(iv), (4)-(ii)
Match the following about mushroom cultivation.
(1) Straw size (i) 20 cm
(2) Distance between blocks (ii) 75 - 85%
(3) Cap size at harvesting (iii) 2 - 4 inch
(4) Relative humidity (iv) 10 - 12 cm
(a) (1)-(iii), (2)-(iv), (3)-(i), (4)-(ii)
(b) (1)-(ii), (2)-(iv), (3)-(i), (4)-(iii)
(c) (1)-(iv), (2)-(iii), (3)-(ii), (4)-(i)
(d) (1)-(iii), (2)-(i), (3)-(iv), (4)-(ii)

5. Pß-ÖU-Sm-i-°ß ]Ö-S-hÀ £S-v-°-¼-¸¢x ¤›z-öu-kU-P¨-£-k® ö|õv :
(A) öµìm-›U-åß ö|õ-v (B) DNA ø»÷Pì
(C) öí¼-÷Pì (D) BÀ-P-ø»ß £õì-L-£-÷hì
The enzyme which is purified from calf intestine :
(a) Restriction enzymes (b) DNA ligase
(c) Helicase (d) Alkaline phosphatase

A [ v¸¨¦P / Turn over

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6. uõ-Á-µ[-P-Îß JÎa-÷\ºU-øPUS ©m-k÷© £¯ß-£-kz-u¨-£-k® `›-¯ JÎ AÍ-Ä :
(A) 3 - 10% (B) 2 - 8%
(C) 2 - 9% (D) 2 - 10%
Solar energy used by green plants for only photosynthesis is :
(a) 3 - 10% (b) 2 - 8%
(c) 2 - 9% (d) 2 - 10%

7. ¦Â öÁ¨-£-©-¯-©õ-u-¾U-SU Põ-µ-n-©õÚ 14% ©Ø-Ö® 60% £_-ø© CÀ» Áõ-²U-PÒ
•øÓ-÷¯ :
(A) CH4 ©Ø-Ö® CO2 (B) N2O ©Ø-Ö® CO2
(C) CH4 ©Ø-Ö® CFC (D) CFC ©Ø-Ö® CO2
One greenhouse gas contributes 14% of total global warming and another contributes
60%. These are respectively identified as :
(a) CH4 and CO2 (b) N2O and CO2
(c) CH4 and CFC (d) CFC and CO2

8. `Ì-{-ø»-°-¯À £i-{-ø»-P-Î-ß \›-¯õÚ Á›-ø\ Aø©¨-¤-øÚU RÌ-{-ø»-°-¼-¸¢x
÷©À-{-ø»US Á›-ø\¨-£-kzv Aø©U-P-Ä®.
(A) SÊ-©® → `ÇÀ ©s-h-»® → {»z-÷uõØ-Ó® → E°º-©®
(B) uÛ E°-›-Ú® → E°-›z-öuõøP → {»z-÷uõØ-Ó® → `ÇÀ ©s-h-»®
(C) E°-›z-öuõøP → E°-›Ú® → E°º©® → {»z-÷uõØ-Ó®
(D) {»z-÷uõØ-Ó® → `ÇÀ ©s-h-»® → E-°º©® → -E-°-ºU-÷PõÍ®
Arrange the correct sequence of ecological hierarchy starting from lower to higher
level.
(a) Community → Ecosystem → Landscape → Biome.
(b) Individual Organism → Population → Landscape → Ecosystem.
(c) Population → Organism → Biome → Landscape.
(d) Landscape → Ecosystem → Biome → Biosphere.

A

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9. ‰k-Â-øuz uõ-Á-µ[-P-ÎÀ Bs ÷P«m-h-Pz uõ-Á-µz-vß •uÀ ö\À :
(A) Em-P-¸ (B) ~s-Âz-x
(C) •uÀ{ø» P¸-Ås v_ (D) ö£¸-Âz-x
The first cell of male gametophyte in angiosperm is __________.

(a) Nucleus (b) Microspore

(c) Primary Endosperm nucleus (d) Megaspore

10. pBR 322, BR Gß-£x :

(A) ¤Íõì-ªm ö£õ-¼-Áº ©Ø-Ö® ÷µõm-›Uì
(B) ¤Íõì-ªm £õU-j-›¯ ©Ö-Tm-i-øn-Ä
(C) ¤Íõì-ªm £õÀ-i-÷©õº ©Ø-Ö® ÷µõm-›Uì
(D) ¤Íõì-ªm £õU-j-›¯ ö£¸U-P®
pBR 322, BR stands for :

(a) Plasmid Boliver and Rodriguez

(b) Plasmid Bacterial Recombination

(c) Plasmid Baltimore and Rodriguez

(d) Plasmid Bacterial Replication

11. Kº E°-›-Ú® J¸ SÔ¨-¤mh Chz-vÀ Aø©¢x uÚ-x £o-°-øÚa ö\¯À-£-kz-x®
`Ì-{-ø»z öuõ-S¨-¦ :
(A) {»z-÷uõØ-Ó® (B) ¦Â Áõ-È-h®
(C) E°º-©® (D) ö\¯À Áõ-È-h®
A specific place in an ecosystem, where an organism lives and performs its function
is :

(a) landscape (b) habitat

(c) biome (d) niche

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12. K[S £s-£õÚ ©g-\Ò Âøu-°-ø»US E›-¯ Jk[S £s¦ :
(A) £aø\ Âøu-°-ø» (B) öÁÒøÍ Âøu-°-ø»
(C) ÷Põn Âøu-°-ø» (D) _¸[-Q¯ Âøu-°-ø»
The recessive trait to the dominant trait of yellow cotyledon is :
(a) Green cotyledon (b) White cotyledon
(c) Axial cotyledon (d) Wrinkled cotyledon

13. Âøu-°À `Ì-Põ®-¤-ÚõÀ HØ-£-k® uÊ®¦ :
(A) Âøu-°-ø» ÷©À-us-k (B) Âøu EÒ-Ð-øµ
(C) ÂøuzuÊ®-¦ (D) •øÍ-÷Áº
The scar left by funiculus in the seed is :
(a) Epicotyl (b) Tegmen
(c) Hilum (d) Radicle

14. RÌ-U-Ps-h-ÁØ-ÔÀ Gx `ÇÀ-©s-h-»z-vß E°-µ-ØÓ TÖ AÀ» ?
(A) P›-©U TÖ-PÒ (B) £õU-j-›-¯[-PÒ
(C) PÛ-©U TÖ-PÒ (D) ©m-S¨ ö£õ-¸m-PÒ
Which of the following is not a abiotic component of the ecosystem ?
(a) Organic compounds (b) Bacteria
(c) Inorganic compounds (d) Humus

15. J÷µ Cµ-Pz uõ-Á-µ[-P-ÐU-Q-øh÷¯ P»¨¦ ö\´-Áx __________ GÚ AøÇU-P¨-
£-k-Q-Ó-x.
(A) J÷µ Cµ-Pz-vØ-SÒ P»¨-¦ (B) ]Ø-Ô-Ú[-P-ÐU-Q-øh÷¯ P»¨-¦
(C) ÷£›-Ú[-P-ÐU-Q-øh÷¯ P»¨-¦ (D) Cµ-P[-P-ÐU-Q-øh÷¯ P»¨-¦
Crosses between the plants of the same variety are called :
(a) intravarietal (b) interspecific
(c) intergeneric (d) intervarietal

A

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£Sv & II/PART - II

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

Note : Answer any six of the following. Question number 24 is compulsory.

16. Gs-÷hõ-w-¼-¯® Gß-ÓõÀ GßÚ ?
What is endothelium ?

17. ÷\õ-u-øÚU P»¨¦ Gß-ÓõÀ GßÚ ?
Define Test Cross.

18. TATA ÷£øÇ Gß-ÓõÀ GßÚ ?

What is TATA box ?

19. ©µ-£q ö£õ-Ô-°¯-¼À £-¯ß-£-kz-u¨-£-k® ö|õ-v-P-Îß ö£¯º-PøÍ GÊ-x-P.
Name the enzymes used in Genetic Engineering.

20. uõ-Ä® ©µ-£-qU-PÒ Gß-ÓõÀ GßÚ ?
What are jumping genes ?

21. En-Äa-\[-Q¼ Gß-ÓõÀ GßÚ ?
What is Food Chain ?

22. ÷uU-Qß £¯ß-PøÍ GÊ-x-P.
Write the uses of Teak Wood.

A [ v¸¨¦P / Turn over

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23. Tmk £›-nõ-©® Gß-ÓõÀ GßÚ ?
What is Co-evolution ?

24. ø\¤-›m – Áøµ-¯-ÖU-P-Ä®.
Define cybrid.

£Sv & III/PART - III

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

Note : Answer any six of the following. Question number 33 is compulsory.

25. J¸ uõ[-QU-P-hz-vø¯ GÆ-ÁõÖ Aøh-¯õÍ® Põs-£õ´ ?
How will you identify a vector ?

26. Cøn K[-Sz-ußø© Gß-ÓõÀ GßÚ ? Kº Gkz-xU-Põmk u¸-P.
What is co-dominance ? Give an example.

27. P¸¨-ø£-°ß Aø©¨-ø£¨ £h® Áøµ¢x £õ-P® SÔU-P-Ä®.
Draw and label the structure of Embryo sac.

28. •uÀ-{ø» AÔ-•-P¨-£-kz-xu-ø»-²® Cµs-hõ®-{ø» AÔ-•-P¨-£-kz-x-u-ø»-²®
÷ÁÖ-£-kz-x-P.
Differentiate primary introduction from secondary introduction.

29. öÁ¨£ AkU-P-ø©Ä Gß-ÓõÀ GßÚ ? Auß ÁøP-PøÍU SÔ¨-¤-k-P.
What is thermal stratification ? Mention their types.

A

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30. ÁÈ-•øÓ Áͺa-]-°ß £À-÷ÁÖ {ø»-PÒ R÷Ç öPõ-kU-P¨-£m-kÒÍx. Au-øÚ
•øÓ¨-£i Á›-ø\¨-£-kz-xP.
|õ- n Ø \x¨¦ {ø», uõ- Á µ ªu- ø Á E°› {ø», ¦uº- ö \i {ø», }¹Ò
‰Ì-Q¯ uõ-Áµ {ø», Põk {ø», }¸Ò ‰ÌQ ªuU-S® {ø», \x¨¦ ¦À-öÁÎ
{ø».
Various stages of succession are given below. From that rearrange them
accordingly.
Reed-swamp stage, phytoplankton stage, shrub stage, submerged plant stage,
forest stage, submerged free floating stage, marsh meadow stage.

31. Põº-£ß ÁÈz-u-h® Gß-ÓõÀ GßÚ ?
What is carbon footprint ?

32. SÔ-±k ©Ø-Ö® SÔ-±-hØÓ CøÇ & ÷ÁÖ-£-kz-x-P.
Differentiate coding and non-coding strand.

33. ~s-q-°º }U-P® Gß-ÓõÀ GßÚ ? Áͺ¨¦ AøÓø¯ GÆ-ÁõÖ ~s-q-°º }U-P®
ö\´-Áõ´ ?
Define sterilization. How will you sterilize a culture room ?

£Sv & IV/PART - IV
SÔ¨¦ : AøÚz-x ÂÚõUPÐUS® Âøh¯ÎUPÄ®. 5x5=25
Note : Answer all the questions.

34. (A) h¥m-h® Gß-ÓõÀ GßÚ ? Auß ÁøP-PÒ ©Ø-Ö® £o-PøÍ GÊ-x-P.
AÀ»x
(B) •Ê-ø©-¯ØÓ K[-Sz-uß-ø©ø¯ Gkz-xU-Põm-k-hß ÂÍU-SP.
(a) What is tapetum ? Write its types and function.
OR
(b) Explain Incomplete Dominance with an example.

A [ v¸¨¦P / Turn over

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35. (A) SÖU- ÷ PØ- Ó ® Gß- Ó õÀ GßÚ ? SÖU- ÷ PØ- Ó z- v ß ö\¯À- • øÓ ÂÍU- P ¨
£hz-vøÚ Áøµ-P.

AÀ»x

(B) uÛ ö\À ¦µ-u® Gß-ÓõÀ GßÚ ? Auß £¯ß-£õ-k-PøÍ GÊ-x-P.
(a) What is crossing over ? Give the diagrammatic representation of crossing
over.

OR

(b) What is single cell protein ? Write its applications.

36. (A) uõ-Áµ v_ Áͺ¨-¤À Ah[-Q-²ÒÍ Ai¨-£-øhU öPõÒ-øP-PøÍ ÂÍU-S-P.

AÀ»x

(B) uP- A- ø ©- Ä Ai¨- £ - ø h- ° À ÁÓsh {»z- u õ- Á - µ [- P - Î ß ÁøP- P - ø Í
Gkz-xU-Põm-kPÐhß ÂÍU-S-P.
(a) Explain the basic concepts involved in plant tissue culture.

OR

(b) Explain the different types of xerophytes based on their adaptive characters
with examples.

37. (A) `ÇÀ ©s-h-»z-vß ÁøP-P-øÍ Gkz-xU-Põm-k-P-Ð-hß £m-i-¯-¼-k-P.

AÀ»x

(B) vµÁ©À»õu PÈÄ J¸ _Põuõµ¨ ¤µa- \ øÚ. Aøuz- wºUP \›- ¯ õÚ
ÁÈ-•-øÓø¯ Ps-h-Ô¢x ÂÍU-S-P.
(a) List out the types of Ecosystem with examples.

OR

(b) Non-liquid wastes cause health problems. Give a solution to manage the
same.

A

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38. (A) |ÃÚ Âøu ÷\ª¨¦ •øÓ-PøÍ ÂÍU-S-P.
AÀ»x
(B) RÌU- P õ- q ® uõ- Á - µ [- P - Î ß ©¸¢- u õ- P ¨ £¯ß- £ - k ® £S- v - P - ø Í- ² ® Auß
©¸z-x-Á¨ £¯ß-P-øÍ-²® GÊ-x-P.
(i) xÍ-]
(ii) ö|À-¼
(iii) -S¨-ø£-÷©-Û
(iv) ÂÀ-Á®
(v) ¤µs-øh
(a) Explain the modern methods of seed storage.

OR

(b) Tabulate the plant parts and its medicinal use of the following :

(i) Holy basil

(ii) Indian gooseberry

(iii) Indian acalypha

(iv) Vilvam

(v) Veldt grape

-oOo-

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