Tamil Nadu 12th Std Model Question Paper Botany

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No. of Printed Pages : 11
3282 (NS)
!3282NSBotany! £vÄ Gs
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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

3282 (NS) 2

1. RÌ-Á-¸-Á-Ú-ÁØ-ÖÒ Gx ©P-µ¢u ©hÀ-P-ÐUS Cøh-°À Põ-n¨-£-k® ÁÍ-©ØÓ
v_¨-£-Sv :
(A) ö£›¤Íõì÷©õ-i-¯® (B) ©P-µ¢u AøÓ
(C) Cøn¨-¦z v_ (D) h¥m- h ®
From the following which one is the column of sterile tissue surrounded by the anther
lobe :
(a) periplasmodium (b) pollen chamber
(c) connective tissue (d) tapetum

2. £m-hõo uõ-Áµ ö\À-P-ÎÀ ö\¯À-£-k® {ø»-ø¯ E¸-ÁõU-P-ÁÀ» vÓ-Ý-øh-¯
•ß-÷Úõi ‰»U-TÖ Gx ?
(A) Le ; le (B) GA1 (C) Le (D) le
Among the pea plant cell which one has the ability to convert a precursor molecule
into an active form ?
(a) Le ; le (b) GA1 (c) Le (d) le

3. ö£õ-¸z-x-P :
(1) K[S ©øÓz-uÀ (i) 9:7
(2) Cµm-i¨¦ ©µ-£-qU-PÒ (ii) 12 : 3 : 1
(3) Jk[S ©øÓz-uÀ (iii) 15 : 1
(4) {µ¨¦ ©µ-£-qU-PÒ (iv) 9:3:4
(A) (1)-(iv), (2)-(i), (3)-(ii), (4)-(iii)
(B) (1)-(ii), (2)-(iii), (3)-(iv), (4)-(i)
(C) (1)-(i), (2)-(ii), (3)-(iii), (4)-(iv)
(D) (1)-(iii), (2)-(iv), (3)-(ii), (4)-(i)
Match the following :
(1) Dominant epistasis (i) 9:7
(2) Duplicate genes (ii) 12 : 3 : 1
(3) Recessive epistasis (iii) 15 : 1
(4) Complementary genes (iv) 9:3:4
(a) (1)-(iv), (2)-(i), (3)-(ii), (4)-(iii)
(b) (1)-(ii), (2)-(iii), (3)-(iv), (4)-(i)
(c) (1)-(i), (2)-(ii), (3)-(iii), (4)-(iv)
(d) (1)-(iii), (2)-(iv), (3)-(ii), (4)-(i)

3 3282 (NS)

4. J÷µ S÷µõ-÷©õ-÷\õ-ªÀ Põ-n¨-£-k® A¸-P-ø©¢u ©µ-£-qU-PÒ Jß-Óõ-P÷Á
£õ-µ®-£-›-¯-©õ-uø» SÔ¨-¤-k-Áx :
(A) ¤øn¨-¦ØÓ ©µ-£-qU-PÒ (B) ¤øn¨-¦-Óõu ©µ-£-qU-PÒ
(C) ]ß-öh-ÛU ©µ-£-qU-PÒ (D) mµõßì ÁøP ©µ-£-qU-PÒ
Genes located close together on the same chromosome and inherited together are
represented as :

(a) linked genes (b) unlinked genes

(c) syntenic genes (d) trans genes

5. TØÖ : Aµõ- ¤ - h õ¨- ] ì uõ- Á - µ U S÷µõ- ÷ ©õ- ÷ \õ- ª ß j÷»õ- ª - ¯ - › À
TTTAGGG GßÓ {-³U-Î-÷¯õ-øhm öuõ-hº Á›-ø\ j÷»õ-ª-¯øµ
Aø©U-Q-Ó-x.

Põ-µ-n® : Cuß E¸-ÁõU-Pz-vØS öµìm-›U-éß Gs-÷hõ{³U-Î-÷¯ì
GÝ® ö|õv EuÄ-Q-Óx. (j-÷»õ-ª-¯º)

(A) TØÖ uÁÖ Põ-µ-n® \›
(B) TØÖ \›, Põ-µ-n® AuØS \›-¯õÚ ÂÍU-P-©õ-S®
(C) TØÖ \›, Põ-µ-n® TØ-ÖU-PõÚ \›-¯õÚ ÂÍU-P-©À-»
(D) TØÖ ©Ø-Ö® Põ-µ-n® Cµs-k® uÁ-Ö
Assertion (A) : Arabidopsis plant chromosomes have more repeats of TTTAGGG
nucleotide sequences in the telomeres.

Reason (R) : Restriction endonuclease enzyme is used in the formation of such a
nucleotide sequence. (Telomeres)

(a) (A) is incorrect, (R) is correct.

(b) (A) is correct, (R) is the correct explanation of (A).

(c) (A) is correct, (R) is the incorrect explanation of (A).

(d) (A) and (R) are wrong.

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3282 (NS) 4

6. ]øu-Á-øh-¯U Ti-¯ E°-› £õ-¼-©º-PÒ GøÁ ?
(A) Cry1Ac ©Ø-Ö® DMH-11 (B) PHAs ©Ø-Ö® PHB
(C) GFP ©Ø-Ö® PGA (D) DMH ©Ø-Ö® HT
The group of degradable biopolymers are :

(a) Cry1Ac and DMH-11 (b) PHAs and PHB

(c) GFP and PGA (d) DMH and HT

7. RÌ- Á - ¸ - Á - Ú - Á Ø- Ö Ò Gx JßÖ Cu- ¯ z- v ØS ©¸¢- u õP ö\¯À- £ - k ®
Cµs-hõ® {ø» Áͺ-]øu ©õØ-Ó¨ ö£õ-¸Ò ?
(A) ÷P¨-ø\-]ß (B) SÂ-øÚß
(C) ÷Põ-iß (D) iáõU-êß
From the following secondary metabolites which one is used as cardiac tonic ?

(a) Capsaicin (b) Quinine

(c) Codeine (d) Digoxin

8. \›-¯õÚ Cøn-ø¯z ÷uº¢-öu-kU-P-Ä®.
(A) Aª» {»z uõ-Á-µ® & -£-Û¨-£-h-»® «x ÁõÌ-£-øÁ
(B) íõ-»õº-k & ©s-oÀ Põ-n¨-£-k® ö©õzu }º
(C) Q›ì-éõº-k & uõ-Á-µ[-P-ÐUS £¯ß-£-hõu }º
(D) GU-íõº-k & -uõ-Á-µ[-P-ÐUS £¯ß-£-k® }º
Pick out the correct pair :

(a) Oxylophytes - Plants living in ice surface

(b) Hollard - Total soil water content

(c) Chresard - Water not available to plants

(d) Echard - Water available to plants

5 3282 (NS)

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

10. ÷|õø¯ E¸-ÁõU-S® A÷Úõ-¤-¼ì öPõ-_U-P-Îß CÚ¨-ö£-¸U-P® ö\´-²®
EøÓ-Â-h-©õP G¢u uõ-Á-µ® EÒÍx ?
(A) I÷Põº-Û-¯õ Qµõ-ê-£ì
(B) ÷»s-hõ-Úõ P©õ-µõ
(C) ¦÷µõ-\õ-¤ì áü-¼-L¨-÷Íõ-µõ
(D) £õºz-w-Û-¯® îì-i-÷µõ-L-÷£õ-µì
Which creates a breeding habitat for disease causing mosquito Anopheles ?
(a) Eichhornia crassipes
(b) Lantana camara
(c) Prosopis juliflora
(d) Parthenium hysterophorus

11. `›-¯ JÎ-°-¼-¸¢x AÀ-»x Á¼-ø©-¯õÚ öPõv P»ß-P-ÎÀ C¸¢x ªß-\õµ®
u¯õ-›U-P¨-£ku-¼ß SÔ¨-¤-hz-uUP vm-h® Gx ?
(A) y´ø© ÷©®-£õk ö\¯À vm-h® (CDM)
(B) S÷Íõ-÷µõ-L-¦-÷Íõ-÷µõ Põº-£ß (CFC)
(C) \õß-Ó-ÎU-P¨-£mh EªÌÄ SøÓ¨-¦ (CER)
(D) uªÌ-|õk ¦v-¯ Põk Áͺ¨-¦zvm-h® (TAP)
Which one of the activities is replacement of conventional electrification projects with
solar panels or other energy efficient boilers ?
(a) Clean Development Mechanism (CDM)
(b) Chloro Fluoro Carbon (CFC)
(c) Certified Emission Reduction (CER)
(d) Tamil Nadu Afforestation Project (TAP)

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3282 (NS) 6

12. E-Áº ußø© ©Ø-Ö® §a] Gvº¨-¦zuß-ø© öPõsh A›] Cµ-P® :
(A) C¯À ö|À µP® (B) A÷hõ-ª-hõ - 2
(C) Smøh A›] ÁøP (D) ö£õß-ÛÓ A›-]
Name the rice variety with saline tolerance and pest resistance.
(a) Wild-type rice (b) Atomita - 2
(c) Dwarf rice variety (d) Golden rice

13. RÌU-Psh G¢u ÷uºÄ ö\´-uÀ •øÓ-¯õ-Úx ¸®-£z-uUP ©õ-Ö-£õ-k-PøÍU
öPõsh uõ-Á-µz-v-øÚ¨ ö£Ó Av-P Põ-»® BS® ?
(A) |PÀ ÷uºÄ (B) Tm-kz ÷uºÄ •øÓ
(C) y¯ Á›ø\ ÷uº-Ä (D) C¯ØøP ÷uº-Ä
Which one of the following selection method takes longer time in bringing about desired
variation ?
(a) Clonal selection (b) Mass selection
(c) Pure line selection (d) Natural selection

14. ªÍ-Põ´US ]Ó¢u ‰»¨-ö£õ-¸ÍõP C¸¨£x :
(A) øÁm-h-ªß A, C ©Ø-Ö® E
(B) øÁm-h-ªß K
(C) øÁm-h-ªß D
(D) øÁm-h-ªß B Tm-k¨-ö£õ-¸Ò ©Ø-Ö® øÁm-h-ªß D
Chillies are a good source of :
(a) Vitamin A, C and E
(b) Vitamin K
(c) Vitamin D
(d) Vitamin B complex and Vitamin D

15. ""P\¨-¦-P-Îß Aµ-\ß'' GÚ AøÇU-P¨-£-k® ‰¼-øPz uõ-Á-µ® :
(A) {»-÷Á®-¦ (B) xÍ-] (C) Bhõ÷uõ-øh (D) ©g-\Ò
The medicinal plant commonly known as “King of Bitters” is :
(a) Nilavembu (b) Holy basil (c) Adathodai (d) Turmeric

7 3282 (NS)

£Sv & II / PART - II

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

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

16. P¸-Ä-ÓõU PÛ-PÒ Gß-ÓõÀ GßÚ ? Gkz-xU-Põm-kz u¸-P.
What is called Parthenocarpic fruits ? Give an example.

17. ©µ-£-q Cøha ö\¯À Gß-ÓõÀ GßÚ ?
What is meant by Gene Interaction ?

18.

(A) ÷©÷» EÒÍ £hz-vÀ SÔ¨-¤-h¨-£-k® SÖU-÷PØ-Óz-vß ÁøP ¯õx ?

(B) AU- S - Ö U- ÷ PØ- Ó z- v ß ©ÖU- T m- i - ø n- Â ß {PÌ-  - ø µÄ (RF) Gz- u øÚ
\u-Ã-u® ?

(a) Which type of crossing over is mentioned in the above diagram ?

(b) Mention the percentage of Recombination Frequency (RF).

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3282 (NS) 8

19. E°-› ÁÈz-v-¸z-u® & Áøµ-¯-ÖU-P-Ä®.
Define - ‘Bioremediation’.

20. Eh-À P»¨-¤-Ú-©õU-PÀ Gß-ÓõÀ GßÚ ?
What is called Somatic Hybridization ?

21. ©õ- \ - ø h¢u ©s- o - ¼ - ¸ ¢x Põm- ª - ¯ zøu APØ- Ö ® •øÓ ¯õx ?
Gkz-xU-Põm-k-hß Áøµ-¯-ÖU-P-Ä®.
Which method is involved in the removal of cadmium from the contaminated soil ?
Define with example.

22. "E°- › z- v - µ Ò ¤µ- ª m G¨- ÷ £õ- x ® uø»- R Ì Ái- Á z- v À Põ- n ¨- £ - k ®'. Eß
Põ-µ-nz-øuU TÖ-P.
‘Pyramid of biomass is always inverted in shape’ - State your explanation.

23. Pi-Ú-©õU-PÀ Âøu ÷|ºz-v-°ß £¯ß-PøÍU SÔ¨-¤-k-P.
Mention the benefits of seed treatment.

24. ©g-\-Îß {Óz-vØS Põ-µ-n-©õÚ ÷Áv¨ ö£õ-¸Ò Gx ? AÆ-÷Á-v¨-ö£õ-¸-Îß
£¯ß-PøÍU SÔ¨-¤-k-P.
Which one of the chemical substance is responsible for the yellow colour in turmeric ?
Mention the uses of that chemical substance.

£Sv & III / PART - III
SÔ¨¦ : GøÁ÷¯Ý® BÖ 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. - • - v º¢u ©P- µ ¢- u ¨ø£°ß SÖUS öÁm- k z ÷uõØ- Ó z- v øÚ £h® Áøµ¢x
£õ-P[-PøÍU SÔ¨-¤-k-P.
Draw the structure of T.S. of mature anther and label its parts.

9 3282 (NS)

26. Jk[S öPõÀ¼ ©µ-£q ö£Ø-ÖÒÍ Bß-i-øµ-Úz-vÀ Põ-n¨-£-k® ‰ßÖ
ÁøPz uõ-Á-µ[-PøÍ ÂÍU-S-P.
Explain the three kinds of plants that have recessive lethal gene in Antirrhinum sp.

27. ¤øn¨¦ ©Ø- Ö ® SÖU- ÷ PØ- Ó z- v ØS Cøh- ° - » õÚ ÷ÁÖ- £ õm- i øÚ
Am-hÁ
- ø
- n¨-£k
- z-xP
- .
Differentiate linkage and crossing over.

28. J¸ uõ[-Q Phz-vU-SÒ |P-»õU-Pzøu GÎ-uõU-SÁ
- u
- ØS ÷uøÁ¨-£k
- ® £s-¦P
- Ò
¯õøÁ ?
What are the features which requires to facilitate cloning in a vector ?

29. EhÀ P¸-Ä-¸-ÁõU-Pz-vß £¯ß-£õ-k-PÒ ¯õøÁ ?
Write the applications of Somatic Embryogenesis.

30. öÁ¨£ AkU-P-ø©Ä Gß-ÓõÀ GßÚ ? Auß ‰ßÖ ÁøP-PøÍU TÖ-P.
What is Thermal Stratification ? Mention its three types.

31. ÁÚa- ` Ì- { ø» ©s- h - » z- v ß Gs- o UøP ¤µ- ª m Pv- › øÇ Ái- Á z- v À
÷uõß-Ö-Á-uß Põ-µ-n® ¯õx ?
Generally the pyramid of number in forest ecosystem looks spindle shape. State your
reason.

32. öuõø» En-›-°ß (Remote Sensing) ]Ó¨¦ £¯ßPÒ ¯õøÁ ?
Bring out specific uses of Remote Sensing.

33. ö\¯Ø-øPz ÷uºÄ •øÓ-°ß ‰ßÖ •U-Q¯ ÁøP-P-øÍU SÔ¨-¤mk H÷u-Ý®
J¸ ÁøP-ø¯ ÂÍU-S-P.
Mention the three main types of artificial selection method and explain one of the
method.

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3282 (NS) 10

£Sv & IV / PART - IV
SÔ¨¦ : AøÚzx ÂÚõUPÐUS® Âøh¯ÎUPÄ®. 5x5=25

Note : Answer all the questions.

34. (A) `À-P-Îß £À-÷ÁÖ ÁøP-PøÍ £hz-x-hß ÂÁ-›U-P-Ä®.
AÀ»x
(B) K[S ußø© ©øÓz-uÀ {PÌøÁ uUP Gkz-xU-Põm-k-hß ÂÁ-›U-P-Ä®.
(a) Explain the different types of Ovule with suitable diagram.

OR

(b) Illustrate the Dominant Epistasis with a suitable example.

35. (A) ¦ÒÎ \kv ©õØ-Ó® Gß-ÓõÀ GßÚ ? Auß ÁøP-PøÍ ÂÁ-›U-P-Ä®.
AÀ»x
(B) E°-›¨ ö£õ-¸Ò öPõÒøÍ Gß-ÓõÀ GßÚ ? ÷Á®¦ ©Ø-Ö® £õ-_-©v
A›-]-°À E°› ö£õ-¸Ò öPõÒøÍU SÔzx ÂÁ-›U-P-Ä®.
(a) What is Point Mutation ? Explain various types of Point Mutation.

OR

(b) What do you mean by Biopiracy ? Explain Biopiracy in Neem and Basmati Rice.

36. (A) uõ-Á-µz v_ Áͺ¨-¤ß £¯ß-£õ-k-PøÍ Á›-ø\¨-£-kz-x-P.
AÀ»x
(B) öuõØ-Öz uõ-Á-µ[-PÒ Gß-ÓõÀ GßÚ ? Auß ¦Ó Aø©¨-¤À Põ-n¨-£-k®
uP-Á-ø©¨-¦-PÒ ¯õøÁ ?
(a) List out the applications of plant tissue culture.

OR

(b) What is ‘Epiphytes’ ? Bring out the morphological adaptation present in it.

11 3282 (NS)

37. (A) ]øuÄ ö\¯À •øÓ-P-ÎÀ EÒÍ £À-÷ÁÖ {ø»-PøÍU TÖ-P.
AÀ»x
(B) K÷\õß SøÓ-u-¼ß •U-Q¯ ÂøÍ-Ä-PÒ ¯õøÁ ?
(a) Bring out the different steps involved in Mechanism of Decomposition.
OR
(b) What are the effects of Ozone depletion ?

38. (A) £À-÷ÁÖ Âu-©õÚ |Ã-Ú Âøu £õ-x-Põ¨¦ •øÓ-P-øÍU SÔ¨-¤-k-P.
AÀ»x
(B) C¯ØøP §a-]U-öPõÀ-¼°øÚ GÆ-Â-u® u¯õ-›¨-£õ´ ? Aøu øP¯õ-Ю
Âuz-vøÚ TÖ-P.
(a) Mention the various modern methods of seed protection.
OR
(b) How will you prepare organic pesticide and how will you handle it ?

- oOo-

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