TN 11th Question Paper 2026 Microbiology

FOR TN 11TH EXAM PREPARATION

TN 11th 2026
Question Paper ·
Microbiology
EXAM YEAR TYPE SUBJECT

TN 11th 2026 Question Paper Microbiology

Notes · Sample Papers · Previous Year Papers · Mock Tests

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No. of Printed Pages : 11
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!9162IstYearMicrobiology! £vÄ Gs
Register Number

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PART - III

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Põ» AÍÄ : 3.00 ©o ÷|µ® ] [ ö©õzu ©v¨ö£sPÒ : 70

Time Allowed : 3.00 Hours ] [ Maximum Marks : 70

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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.

(3) Draw diagrams wherever necessary.

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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. ö£›¯®ø© ÷|õ°¼¸¢x ]ÖÁøÚ¨ £õxPõUP GmÁºk öáßÚº
RÌUPshÁØÖÒ Gøu E£÷¯õP¨£kzvÚõº ?
(A) Sµ[P®ø© (B) £_ A®ø©°ß ö£õ¸Ò
(C) •¯À A®ø© (D) ö£›¯ A®ø©°ß ö£õ¸Ò
Which of the following did Edward Jenner use to protect the boy against small pox ?

(a) Monkeypox (b) Cowpox material

(c) Rabbitpox (d) Smallpox material

2. R÷Ç öPõkUP¨£mkÒÍ Ev›¨ £õP[PÎÀ Gx Tmk ~s÷nõUQ°À
ö£õ¸¢uõux ?
(A) Gö»Umµõß Pß (B) ÷©øh ¤i¨£õß
(C) ø£ÚõUS»º Ps A¸S- (D) öuÎÁõÚ {ø» v¸S
All the following are components of compound microscope except :

(a) Electron gun (b) Stage clips

(c) Binocular eye piece (d) Fine adjustment knob

3. Qµõ® \õ¯÷©ØS® •øÓ°À ¤ßÁ¸® Á›ø\•øÓ°À \õ¯[PÒ öPõkUP¨
£kQßÓÚ. :
(A) ö©zv¼ß ¦Ð, BÀPíõÀ, A÷¯õiß, \õ¨›Ûß
(B) \õ¨›Ûß, BÀPíõÀ, ö©zv¼ß ¦Ð, A÷¯õiß
(C) Q›ìhÀ Á¯»m, BÀPíõÀ, A÷¯õiß, \õ¨›Ûß
(D) Q›ìhÀ Á¯»m, A÷¯õiß, BÀPíõÀ, \õ¨›Ûß
The order of reagents in the gram staining reactions are :

(a) Methylene blue, Alcohol, Iodine, Safranin

(b) Safranin, Alcohol, Methylene blue, Iodine

(c) Crystal violet, Alcohol, Iodine, Safranin

(d) Crystal violet, Iodine, Alcohol, Safranin

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4. G¢u •øÓ°À 160 EC öÁ¨£{ø» 1 ©o ÷|µ AÍÄ £¯ß£kzu¨£kQÓx ?

(A) öÁ¨£UPõØÖ Ak¨¦ (B) ö\¢{Ó öÁ¨£®
(C) _hº (D) APa]Á¨¦ PvºPÒ
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In which method, temperature of 1608C for 1 hour is employed ?

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(a) Hot air oven

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(c) Flaming (d) Infrared radiation

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GßÖ AøÇUP¨£kQßÓx.
(A) Aøµ {ø»¯õP P»UP¨£mh Áͺa]
(B) y¯ Áͺa]U P»øÁ
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(D) P»UP¨£mh Áͺa]
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The culture with only one type of organism in the colony is called :

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(a) Semi-mixed culture

(b) Pure culture

(c) Contaminated culture

(d) Mixed culture

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Organisms that are capable of growing in 08C are called ________.

(a) Mesophiles (b) Thermophiles

(c) Psychrophiles (d) Hyper Thermophiles

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7. Tku»õÚ S÷µõ÷©õ÷\õ® i.Gß.H __________ ö£¯›À AøÇUP¨£kQÓx.
(A) EmP¸ (B) ¤Íõìªm
(C) EÒÁmhP¸ (D) G¨¤÷\õ®
The extra chromosomal DNA is called :

(a) Nucleus (b) Plasmids

(c) Nucleoid (d) Episome

8. ~sq°›PøÍ C¸ ö£¯›mk ÁøP¨£kzx® •øÓ°À EÒÍ Cµsk ö\õØPÒ
Sﬣx :
(A) ]ØÔÚ® ©ØÖ® ÁøP (B) Á›ø\ ©ØÖ® Sk®£®
(C) ÷£›Ú® ©ØÖ® ]ØÔÚ® (D) Sk®£® ©ØÖ® ÷£›Ú®
Binomial nomenclature means writing the name of micro-organism in two words :

(a) Species and Variety (b) Order and Family

(c) Genus and Species (d) Family and Genus

9. PõØÖ E°›¯À GßÓ Áõºzøu 1930 B® Bsk __________ BÀ E¸ÁõUP¨£mhx.
(A) PõºöÚÀ¼ ©ØÖ® ¤Ó |£ºPÒ
(B) F.C. ÷©¯º
(C) ¿°ì £õ´a\º
(D) ªUPÀ
In 1930, the term aerobiology was coined by ________.

(a) Carnelly and colleagues

(b) F.C. Meier

(c) Louis Pasteur

(d) Miquel

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10. wø© u¸® ~sq°› öuõhº¦ __________ GßÖ AøÇUP¨£kQÓx.
(A) £Qº¢x ÁõÊ® •øÓ (B) ª³a_Á¼\®
(C) Tmk°› ÁõÌUøP •øÓ (D) Bsh÷PõÛ\®
Harmful interaction is otherwise called as __________.
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(a) Commensalism (b) Mutualism

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Symbiosis (d) Antagonism

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(A) öhÀhõ AP |a_ (B) I¢x Âzx £iP®
(C) Qøµ ¦µu® (D) ÷©ØTÔ¯ AøÚzx®
The toxic effect of Bacillus thuringiensis is due to _________.

(a) Delta endotoxin (b) Parasporal crystals

(c) Cry protein (d) All of the above

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(3) Cøµ¨ø£ ShÀ £õøu (iii) öuõsøh AÇØ]
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(4) CÚ¨ö£¸UP £õøu (iv) Põ»µõ
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(A) (1) - (ii), (2) - (iii), (3) - (iv), (4) - (i) (B) (1) - (i), (2) - (iii), (3) - (ii), (4) - (iv)

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(C) (1) - (iii), (2) - (iv), (3) - (ii), (4) - (i) (D) (1) - (ii), (2) - (iv), (3) - (iii), (4) - (i)

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(3)
Respiratory infection

Gastrointestinal infection
(ii)

(iii)
Trachoma

Pharyngitis

(4) Sexually transmitted infection (iv) Cholera

(a) (1)-(ii), (2)-(iii), (3)-(iv), (4)-(i) (b) (1)-(i) , (2)-(iii), (3)-(ii), (4)-(iv)

(c) (1)-(iii), (2)-(iv), (3)-(ii), (4)-(i) (d) (1)-(ii), (2)-(iv), (3)-(iii), (4)-(i)

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13. ÷á&\[Q¼ ¤ßÁ¸® G¢u C®³÷ÚõS÷Íõ¦¼Ýhß öuõhº¦øh¯ J¸
(J Chain)

QøÍU÷Põ ö£møhk \[Q¼ ?
(A) IgD (B) IgA (C) IgE (D) IgG

J Chain is a glycopeptide chains associated with which of the following immunoglobulins ?

(a) IgD (b) IgA (c) IgE (d) IgG

14. TØÖ (A) : öí¼÷Pì i.Gß.H &Âß CøÇPøÍ ¤›UQÓx.
TØÖ (B) : S.S.B. ¦µu[PÒ JØøÓ CøÇ i.Gß.H &À Cøn¢x {ø»¨£kzxQÓx.
(A) TØÖ (A) ©ØÖ® TØÖ (B) Cµsk® \›.
(B) TØÖ (A) ©mk® \›.
(C) TØÖ (A) ©ØÖ® TØÖ (B) Cµsk® uÁÖ.
(D) TØÖ (B) ©mk® \›.
Statement (A) : Helicase unwinds the DNA.

Statement (B) : S.S.B. Proteins bind to single stranded DNA and stabilise it.

(a) Statement (A) and Statement (B) are true

(b) Statement (A) only true

(c) Statement (A) and Statement (B) are false

(d) Statement (B) only true

15. R÷Ç EÒÍøÁPÎÀ Gx Cµshõ® {ø» {n}º EÖ¨¦ AÀ» ?
(A) {n}º •ia_PÒ (B) øu©ì
(C) ÷PõøǨ£h»® öuõhº¦øh¯ {n}º v_ (D) ©spµÀ
Which of the following is not a secondary lymphoid organ ?

(a) Lymph nodes (b) Thymus

(c) MALT (d) Spleen

For more Question Papers, Sample Papers, Notes & Syllabus visit Page 6 of 12

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£Sv & II / PART - II

SÔ¨¦ : GøÁ÷¯Ý® BÖ ÂÚõUPÐUS Âøh¯ÎUPÄ®. ÂÚõ Gs 24 &US
6x2=12
Pmhõ¯©õP Âøh¯ÎUPÄ®.
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Note :
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Answer any six questions. Question No. 24 is compulsory.
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16. ~sq°›¯¼À ~s÷nõUQ°ß •UQ¯zxÁ® ¯õx ?
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What is the importance of microscopy in Microbiology ?

17. AÛ©ÀU³À – Áøµ¯ÖUPÄ®.
Define Animalcules.

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18. öÁ¨£UPõØÖ Ak¨¦ £h® Áøµ¢x £õP® SÔUPÄ®.
Draw and label Hot Air Oven.
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19. }ºzxÎ EmP¸ GßÓõÀ GßÚ ?
What is Droplet Nuclei ?

20. \õ¯® ©ØÖ® øh&UPõÚ ÷ÁÖ£õkPøÍ GÊxP.

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Distinguish between a Dye and a Stain.

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22. Gß.¤. GßÓõÀ GßÚ ?
What is NPV ?

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23. ö\¨i]ª¯õ GßÓõÀ GßÚ ?
What is Septicemia ?

24. Áøµ¯ÖUPÄ®.
(A) {³UÎ÷¯õøhk
(B) {³UÎ÷¯õø\k
Define.

(a) Nucleotide

(b) Nucleoside

£Sv & III / PART - III

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

Note : Answer any six questions. Question No. 33 is compulsory.

25. E¸¨ö£¸UP® Áøµ¯Ö. E¸¨ö£¸UP vÓøÚ GÆÁõÖ PnURk ö\´Áõ´ ?
Define Magnification. How to calculate Magnification ?

26. §gø\PøÍ uÛø©¨£kzu £¯ß£kzu¨£k® HuõÁx ‰ßÖ §gø\
FhP[Pøͨ £ØÔ GÊxP.
State any three fungal media used for isolation of fungi.

27. Pmhõ¯ PõØÖ _Áõ]PÒ ©ØÖ® Pmhõ¯ PõØÓØÓ _Áõ]PÒ & ÷ÁÖ£kzxP.
Differentiate - Obligate Aerobes and Obligate Anaerobes.

28. ö\À ÷©¾øÓ°ß •UQ¯zxÁzøu GÊxP.
Write the significance of Cell Envelope.

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29. Áøµ¯ÖUPÄ®.

(A) øµ÷\õ줯º

(B) ¤À÷»õ줯º
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(C) ìö£º÷©õ줯º
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Define.

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Rhizosphere

(b) Phyllosphere

(c) Spermosphere

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30. IgM &ß £s¦PøÍ SÔ¨¤kP.
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Mention the properties of IgM.

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31. Â.H.G® &ß AvP AÍÄ EØ£zv £ØÔ ]Ö SÔ¨¦ GÊxP.

Write short notes on the mass production of VAM.

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32.

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Write about the microbial disease of upper respiratory tract infection.

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33. {Ó® {Özv (Mordant) £ØÔ ]Ö SÔ¨¦ GÊxP.

Write short notes on Mordant.

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£Sv & IV / PART - IV

SÔ¨¦ : AøÚzx ÂÚõUPÐUS® Âøh¯ÎUPÄ®. 5x5=25

Note : Answer all the questions.

34. (A) PõUQß uzxÁ[PøÍ ÂÍUSP.
AÀ»x
(B) AP]uÀ Âøu GÆÁõÖ £õºUP¨£kQÓx ?
(a) Explain Koch’s postulates.

OR

(b) How to visualise an Endospore ?

35. (A) ÷Põk umk •øÓø¯ ÂÁ›UPÄ®.
AÀ»x
(B) ~sq°›PÎß Áͺa] & Áøµ¯Özx Áͺa] {ø»PøÍ £hzxhß
ÂÁ›UPÄ®. (H÷uÝ® Cµsk {ø»PÒ)
(a) Explain Streak Plate method.

OR

(b) Define Microbial growth. Explain the phases of microbial growth with diagram.

(Any two phases)

36. (A) C¢yº •øÓ ‰»® P»¨¦ Eµ® u¯õ›US® •øÓ £ØÔ ÂÍUSP.
AÀ»x
(B) wø© u¸® ~sq°›PÎß öuõhº¦PøÍ £ØÔ ÂÍUSP.
(a) Explain about Indore method of composting.

OR

(b) Explain about the harmful microbial interactions.

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37. (A) ÷£÷Põø\mhõì]ì &ß £À÷ÁÖ {ø»PøÍ _¸UP©õP ÂÍUSP.
AÀ»x
(B) i.Gß.H Cµmøha _¸Ò Aø©¨ø£ Áøµ£h® ‰»® ÂÍUSP.
(a) Briefly explain the various stages in Phagocytosis.
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(b) Diagramatically explain the DNA Double Helix structure.

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(A) ~sq°º }UP® ©ØÖ® £õì\øµ÷\åß & ÷ÁÖ£kzxP.
AÀ»x
(B) £õUj›¯õÂß Pø\°øÇPÎß ÁøPPøÍ £hzxhß AmhÁøn¨£kzxP.
(a) Differentiate Sterilization and Pasteurization.

OR

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(b) Tabulate the types of Bacterial Flagella with diagram.

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