TN 12th Model Question Paper Botany

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No. of Printed Pages : 8
1332 (NP)
£vÄ Gs
A Register Number

!1332NPBotany!
PART - III
uõÁµÂ¯À / BOTANY
( uªÌ ©ØÖ® B[Q» ÁÈ / Tamil & English Version )

Põ» AÍÄ : 2.30 ©o ÷|µ® ] [ ö©õzu ©v¨ö£sPÒ : 70
Time Allowed : 2.30 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.

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1. ø\m÷hõøPÛß £o Cøu AvP›¨£x :
(A) ö\À £S¨¦ (B) ©õÖ£õk AøhuÀ
(C) ö\À }m]¯øhuÀ (D) PÛ E¸ÁõUP®
The function of Cytokinin is to increase :
(a) cell division (b) differentiation
(c) cell elongation (d) fruit initiation

2. ¤ßÁ¸® G¢u PõµnzvÚõÀ •vº¢u \À»øhU SÇõ´ TÖPÍõÀ EnøÁ
PhzxÁvÀ Dk£h C¯»ÂÀø» :
(A) xøÍPÒ ÷P÷»õéõÀ AøhUP¨£kÁuõÀ
(B) xøÍPÒ öíª ö\À¾÷»õéõÀ AøhUP¨£kÁuõÀ
(C) xøÍPÒ øh÷»õö\ìPÍõÀ AøhUP¨£kÁuõÀ
(D) xøÍPÒ ö\À¾÷»õéõÀ AøhUP¨£kÁuõÀ
Conduction of food materials does not take place in mature sieve elements because :
(a) Pores are blocked by callose
(b) Pores are blocked by hemi-cellulose
(c) Pores are blocked by tyloses
(d) Pores are blocked by celluloses

3. ÷uõmh¨£mhõo uõÁµzvß ÷P«mkPÎÀ Põn¨£k®
S÷µõ÷©õ÷\õ®PÎß GsoUøP :
(A) 7 (B) 12 (C) 5 (D) 23
Number of chromosome found in gametes of garden pea plant :
(a) 7 (b) 12 (c) 5 (d) 23

4. £°ºz uõÁµ[P÷Íõk ÷\º¢x Á͸® ÷uøÁ¯ØÓ ö\iPøÍ AÈUP GuøÚ
£¯ß£kzxÁõ´ ?
(A) GA (B) NAA (C) IAA (D) 2, 4-D
What will you use to eradicate the unnecessary plants which grow with crops ?
(a) GA (b) NAA (c) IAA (d) 2, 4-D

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5. ¦÷µõø»ß GßÓ Aª÷Úõ Aª»zvØS CCA, CCC, CCU ©ØÖ® __________
GßÝ® |õßS \[÷Pu[PÒ EÒÍÚ.
(A) CCG (B) UGA (C) UAA (D) AAG
Proline has four codons CCA, CCC, CCU and __________.
(a) CCG (b) UGA (c) UAA (d) AAG

6. BìQ÷ÚõªÛ B줵õ J¸ :
(A) Cøh {»z uõÁµ® (B) ¼z÷uõLø£m
(C) ÁÓÒ {»z uõÁµ® (D) }ºz uõÁµ®
Aeschynomene aspera is a :
(a) Mesophyte (b) Lithophyte
(c) Xerophyte (d) Hydrophyte

7. ©Ûuß EmöPõÒÍ uUP øÁmhªß ö\Ô¢u ©õzvøµPÒ Cv¼¸¢x
u¯õ›UP¨£kQÓx ?
(A) PõÍõß (B) ìø£¸¼Úõ
(C) |õìhõU (D) Dìm
Enriched vitamin tablets are produced from the following organism for human
consumption :
(a) Mushroom (b) Spirulina
(c) Nostoc (d) Yeast

8. ÷ÁºzyÂPÒ __________ ¼¸¢x ÷uõßÖQßÓÚ.
(A) øí¨÷£õöhºªì (B) ö£›ø\UQÒ
(C) iøµU÷Põ¤ÍõìmkPÒ (D) APz÷uõÀ
The root hairs originates from :
(a) Hypodermis (b) Pericycle
(c) Trichoblasts (d) Endodermis

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9. uõÁµzvß AøÚzx EÖ¨¦Pξ® ö£õxÁõP Põn¨£k® v_ :
(A) ÷Põ»ßøP©õ (B) ìQεßøP©õ
(C) £õµßøP©õ (D) S÷ÍõµßøP©õ
The tissue generally present in all organs of plant is :
(a) Collenchyma (b) Sclerenchyma
(c) Parenchyma (d) Chlorenchyma

10. ø£÷¯õ&j\À Gsön´ u¯õ›UP £¯ß£k® uõÁµ® :
(A) ›]Úì P®³Ûì (B) ¤À»õ¢uì A©õµì
(C) ám÷µõ£õ SºPõì (D) ám÷µõ£õ PõꨤL÷£õ¼¯õ
Bio-diesel is extracted from :
(a) Riccinus communis (b) Phyllanthus amarus
(c) Jatropha curcas (d) Jatropha gossypifolia

11. £›÷\õuøÚ ÁøP£õmi¯À GßÓ ö\õØPøÍ E¸ÁõUQ¯Áº __________.
(A) P÷µõ»ì ¼ß÷Ú¯ì (B) G[ͺ ©ØÖ® ¤µõshÀ
(C) ÷P®¨ ©ØÖ® QÀ¼ (D) áõºä ö£¢u® ©ØÖ® íüUPº
Who coined the term biosystematics ?
(a) Carolus Linnaeus (b) Engler and Prantl
(c) Camp and Gily (d) George Bentham and Hooker

12. iµõßìL£÷µìPÐUS GkzxUPõmk :
(A) îìiiß iPõº£õUê÷»ì (B) G-3-P iøímµá÷Úì
(C) iµõßì Aª÷Úì (D) ø£¸ÂU Põº£õUê÷»ì
An example for transferase is :
(a) Histidine decarboxylase (b) G-3-P dehydrogenase
(c) Transaminase (d) Pyruvic carboxylase

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13. C¢v¯õÂÀ Põ¨¦›ø©U Põ»® __________ BskPÒ.
(A) 20 (B) 10 (C) 17 (D) 5
Duration of patent in India is __________ years.
(a) 20 (b) 10 (c) 17 (d) 5

14. __________ À ¦ØÖ÷|õø¯ Sn¨£kzx® ö£õ¸mPÒ EÒÍÚ.
(A) £õì©v (B) ©õºª÷»õ]ß
(C) ÂßPõ ÷µõ]¯õ (D) ¤÷µ]ß
__________ possesses anticancerous properties.
(a) Basmati (b) Marmelosin
(c) Vinca rosea (d) Brazzein

15. JÎa÷\ºUøPø¯ ªPz vÓ®£hz ysk® JÎ Aø» :
(A) 400 nm - 700 nm (B) 700 nm - 900 nm
(C) 100 nm - 200 nm (D) 200 nm - 300 nm
Which of the following wavelengths of light is most effective for photosynthesis ?
(a) 400 nm to 700 nm (b) 700 nm to 900 nm
(c) 100 nm to 200 nm (d) 200 nm to 300 nm

£Sv & II / PART - II
GøÁ÷¯Ý® BÖ ÂÚõUPÐUS ©mk® Âøh¯ÎUPÄ®. ÂÚõ Gs 24 &US
Psi¨£õP Âøh¯ÎUPÄ®. 6x2=12
Answer any six of the following. Question Number 24 is compulsory.
16. A›U÷P]°ß ÁøP¨£õmk {ø»ø¯ GÊxP.
Write the systematic position of Arecaceae.

17. Cµ¨£º u¸® uõÁµ[PÒ Cµsiß C¸ ö\õØö£¯øµ GÊxP.
Write the binomial of two rubber yielding plants.

18. E°› Põ¨¦›ø©°ß C¸ •UQ¯ A®\[PÒ ¯õøÁ ?
What are the two unique facets of Bio-Patency ?

19. ©µ¦ Áøµ£hzvß £¯ßPÒ ¯õøÁ ?
What are the uses of gene mapping ?

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20. £i¯õUP® & Áøµ¯Ö.
Define transcription.

21. P»¨¦ DNA &øÁ E¸ÁõUSÁvÀ Dk£k® ö|õvPÒ ¯õøÁ ?
Name the enzymes involved in making hybrid DNA.

22. JÎa÷\ºUøP°ß Jmkö©õzu ÂøÚ°ß \©ß£õmøh GÊxP.
Write the overall equation of photosynthesis.

23. JÎa_Áõ\zvØS®, C¸m_Áõ\zvØS® Cøh÷¯ Põn¨£k® ÷ÁÖ£õkPÒ
H÷uÝ® CµsiøÚ GÊxP.
Write any two differences between photorespiration and dark respiration.

24. BUS v_¼¸¢x {ø»zu v_øÁ ÷ÁÖ£kzxP.
Differentiate meristematic tissue from permanent tissue.

£Sv & III / PART - III
GøÁ÷¯Ý® BÖ ÂÚõUPÐUS ©mk® Âøh¯ÎUPÄ®. ÂÚõ Gs
33 &US Pmhõ¯©õP Âøh¯ÎUPÄ®. 6x3=18
Answer any six of the following. Question Number 33 is compulsory.

25. ö£¢u® ©ØÖ® íüUPº ÁøP£õmiß {øÓPÒ H÷uÝ® ‰ßÔøÚ GÊxP.
Write any three merits of Bentham and Hooker’s classification of plants.

26. øí¤ìPì ÷µõ\õ&ø\Úß]ì uõÁµzvß ©»º Áøµ£h® ©ØÖ®
Áõ´£õmøh GÊxP.
Draw the floral diagram and write the floral formula of Hibiscus rosa-sinensis.

27. ö£›öhº® GÆÁõÖ E¸ÁõQÓx ?
How periderm is formed ?

28. S÷µõ÷©õ÷\õªß Aø©¨ø£¨ £h® Áøµ¢x £õP[PÒ SÔUPÄ®.
Draw the structure of chromosome and label its parts.

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29. ãß ©õØÓzuõÀ E¸ÁõÚ ö£õ¸mPÒ H÷uÝ® ‰ßÔß ö£¯ºPøÍ GÊv
AÁØÔß £¯ßPøÍ SÔ¨¤kP.
Write any three genetically engineered products and mention their functions.

30. ›a©õsm »õ[ ÂøÍÄ GßÓõÀ GßÚ ?
What is Richmond Lang effect ?

31. HQÀ ©õºª»õì uõÁµzvß ©¸zxÁ £¯ßPøÍ GÊxP.
Write the medicinal value of Aegle marmelos.

32. E°º öuõÈÀ ~m£Â¯¼À G.÷Põø»°ß •UQ¯zxÁ® ¯õx ?
What is the importance of E.Coli in biotechnology ?

33. C4 uõÁµ[PÎÀ JÎÂøÚ ©ØÖ® C¸Ò ÂøÚ uÛzuÛ¯õP |hUQÓx.
CUTØÖ \›¯õ, uÁÓõ ? EÚx Âøhø¯ {¯õ¯¨£kzxP.
“C4 plants shows segregation of photosynthetic work.” State whether the statement is
true or false. Justify your statement.

£Sv & IV / PART - IV
AøÚzx ÂÚõUPÐUS® Âøh¯ÎUPÄ®. 5x5=25
Answer all the questions.
34. (A) ª³\õ £õµiê¯õPõÂß ©»›ß £s¦PøÍ Pø»aö\õØPÍõÀ ÂÁ›.
AÀ»x
(B) öíº÷£›¯® GßÓõÀ GßÚ ? Auß •UQ¯zxÁ® |õßQøÚ GÊxP.
(a) Describe the flower of Musa Paradisiaca in technical terms.
OR
(b) What is Herbarium ? Write any four significance of herbarium.

35. (A) Bsk Áøͯ[PÒ £ØÔ SÔ¨¦ ÁøµP.
AÀ»x
(B) `Ì¢uø©¢u ÁõìS»õº PØøÓ GßÓõÀ GßÚ ? Auß ÁøPPøÍ
£hzxhß ÂÁ›.
(a) Write short notes on annual rings.
OR
(b) What are concentric vascular bundles ? Explain its types with neat labelled
diagram.

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36. (A) ¤ßÁ¸® ö\õØPøÍ uõÁµ v_ Áͺ¨¦ •øÓ÷¯õk Á›ø\¨£kzv
ÂÁ›.
(i) ¦Óz÷uõØÓ©õUP® (ii) Á¾¨ö£ÖuÀ
(iii) Emö\¾zxuÀ (iv) P¸ E¸ÁõUP®
AÀ»x
(B) SÐU÷Põì, ø£¸ÂU Aª»©õP ©õØÓ©øh²® {PÌa]ø¯ ÂÁ›.
(Áøµ£h® ÁÈ)
(a) Rearrange the following terms based on techniques of plant tissue culture and
explain.
(i) Morphogenesis (ii) Hardening
(iii) Inoculation (iv) Embryogenesis
OR
(b) Describe the process in which glucose is converted into pyruvic acid with the
help of Flowchart.

37. (A) ö£ß÷hõì £õì÷£m ÁÈzuhzvß •UQ¯zxÁ® ¯õøÁ ?
AÀ»x
(B) Phzx RNA &Âß Aø©¨ø£ £hzxhß ÂÁ›.
(a) Write the significance of pentose phosphate pathway.
OR
(b) Explain the structure of t-RNA with diagram.

38. (A) (i) {»UPhø»°ß C¸ö\õØ ö£¯º ¯õx ? Cx G¢uU Sk®£zøua
\õº¢ux ?
(ii) {»UPhø»°ß ö£õ¸Íõuõµ •UQ¯zxÁ® H÷uÝ® I¢vøÚ
GÊxP.
AÀ»x
(B) DNA ©Ö÷\ºUøP öuõÈÀ~m£® GßÓõÀ GßÚ ? Auß {PÌÄPøÍ
GÊxP.
(a) (i) What is the binomial of groundnut ? To which family groundnut belongs
to ?
(ii) Bring out any five economic importance of groundnut.
OR
(b) Define DNA recombinant technology. Mention its events.

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