Tamil Nadu 11th Std Model Question Paper Bio-Chemistry

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3463 (NS)
!3463NSIstYearBiochemistry! £vÄ Gs
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PART - III
E°º ÷Áv°¯À / BIO - CHEMISTRY
(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®
AiU÷PõikÁuØS® £¯ß£kzu ÷Ásk®. £h[PÒ ÁøµÁuØS
ö£ß]À £¯ß£kzu ÷Ásk®.
(3) ÷uøÁ¯õÚ ChzvÀ Áøµ£h® ©ØÖ® \©ß£õkPøÍz u¸P.
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 and write equations wherever necessary.

£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

3463 (NS) 2

1. ©Ûu Eh¼À EÒÍ }›ß ö£¸®£Sv __________ £Sv°À EÒÍx.
(A) ö\À¼øhz vµÁ® (B) ö\À EÒvµÁ®
(C) ö\ÀöÁÎz vµÁ® (D) ¤Íõì©õ
Most of the water in the human body is present in __________.
(a) Interstitial fluid (b) Intracellular fluid
(c) Extracellular fluid (d) Plasma

2. £Sv¯ÍÄ }µõØ£SUP¨£mh ¦µu[PÒ :
(A) Gί ¦µu[PÒ (B) ö£¨øhkPÒ
(C) £õ¼ö£¨øhkPÒ (D) ö£¨÷hõßPÒ
Partially hydrolyzed proteins are __________.
(a) Simple Proteins (b) Peptides
(c) Polypeptides (d) Peptones

3. __________ QͺÄØÓ Aª÷Úõ Aª»[PøÍ ¦µu öuõS¨¦z uÍzvØS
PhzxQÓx.
(A) rRNA (B) mRNA (C) tRNA (D) miRNA
__________ transfers activated aminoacid, to the site of protein synthesis.
(a) rRNA (b) mRNA (c) tRNA (d) miRNA

4. ¦µu Aø©¨¤À α _¸Ò Aø©¨¦ ÷\º¢u £i{ø» Gx ?
(A) |õßPõ® {ø» Aø©¨¦ (B) •ußø© Aø©¨¦
(C) Cµshõ® {ø» Aø©¨¦ (D) ‰ßÓõ® {ø» Aø©¨¦
To which hierarchical level of protein structure does α helix belong ?
(a) Quarternary structure (b) Primary structure
(c) Secondary structure (d) Tertiary structure

5. ^µØÓ G¾®¦¸ÁõUP® GuÝhß öuõhº¦øh¯x ?
(A) ï÷©õS÷Íõ¤ß (B) öPõÀ»õáß
(C) ø©÷¯õS÷Íõ¤ß (D) ö\¸÷»õ¤Íõìªß
Osteogenesis Imperfecta (O.I) is associated with __________.
(a) Haemoglobin (b) Collagen
(c) Myoglobin (d) Ceruloplasmin

3 3463 (NS)

6. ö£õ¸zxP :
(1) ³›÷Pì (i) Gvº E°›
(2) i›¨]ß (ii) ÷uõÀ ¦s
(3) öPõÀ»õâ÷Úì (iii) AÇØ]
(4) ø»÷\õø\® (iv) •hUSÁõu®
(A) (1) - (ii), (2) - (i), (3) - (iv), (4) - (iii) (B) (1) - (iv), (2) - (iii), (3) - (ii), (4) - (i)
(C) (1) - (iv), (2) - (ii), (3) - (iii), (4) - (i) (D) (1) - (ii), (2) - (iv), (3) - (i), (4) - (iii)
Match the following :
(1) Uricase (i) Antibiotic
(2) Trypsin (ii) Skin ulcers
(3) Collagenase (iii) Inflammation
(4) Lysozyme (iv) Gout
(a) (1) - (ii), (2) - (i), (3) - (iv), (4) - (iii) (b) (1) - (iv), (2) - (iii), (3) - (ii), (4) - (i)
(c) (1) - (iv), (2) - (ii), (3) - (iii), (4) - (i) (d) (1) - (ii), (2) - (iv), (3) - (i), (4) - (iii)

7. ¦øP¨£h uõμ¸¢x, ]ÀÁøµ ¤›zöukUS® ö\¯À•øÓ°À,
öá»õmiøÚ Pøµzx }UP __________ £¯ß£kzu¨£kQÓx.
(A) Q›¯õiß øP÷Úì (B) Aø©÷»ì
(C) ö£¨]ß (D) BÀ÷hõ÷»ì
__________ is used to digest gelatin in the process of recovering silver from photographic
films.
(a) Creatine kinase (b) Amylase
(c) Pepsin (d) Aldolase

8. DNA £ØÔ¯ \›¯õÚ TØÖPøÍz ÷uº¢öukUPÄ®.
(i) \õºPõL¨ Âvø¯ ¤ß£ØÖÁvÀø»
(ii) ²µõ]À Põn¨£kQßÓÚ
(iii) EmP¸, ø©m÷hõPõsi›¯õ ©ØÖ® £_[PoP[PÎÀ Põn¨£kQÓx
(iv) Cx AvP {ø»¨¦zußø© Áõ´¢ux ©ØÖ® BÀP¼PÍõÀ GÎvÀ
}µõØ£S¨£øhÁvÀø»
(A) (ii) ©Ø-Ö® (iv) ©mk® (B) (i) ©Ø-Ö® (ii) ©mk®
(C) (iii) ©Ø-Ö® (iv) ©mk® (D) (i) ©Ø-Ö® (iii) ©mk®
Pick out the correct statements about DNA :
(i) Does not obey Chargaff’s rule
(ii) Uracil is present
(iii) Present in the nucleus, mitochondria and chloroplast
(iv) It is stable and not hydrolysed easily by alkali
(a) (ii) and (iv) only (b) (i) and (ii) only
(c) (iii) and (iv) only (d) (i) and (iii) only

[ v¸¨¦P / Turn over

3463 (NS) 4

9. _U÷µõø\, ø|m›U Aª»zxhß ÂøÚ¨£kzx® ÷£õx E¸ÁõÁx __________.
(A) ]m›U Aª»® (B) BU\õ¼U Aª»®
(C) »õļU Aª»® (D) »õUiU Aª»®
Sucrose is treated with HNO3 to form __________.
(a) Citric acid (b) Oxalic acid
(c) Laevulic acid (d) Lactic acid

10. ì¤[÷Põ £õì÷£õ¼¨¤kPÒ __________ v_UPÎÀ AvP®
Põn¨£kQßÓÚ.
(A) PÀ½µÀ (B) Cu¯® (C) ]Ö}µP® (D) ‰øÍ
Sphingo phospholipids are highly present in __________ tissue.
(a) Liver (b) Heart (c) Kidney (d) Brain

11. öÁ¨£{ø»ø¯ £øǯ {ø»ø©US SøÓzx, C¯À¤Ç¢u DNA &Âß
Cµmøh CøÇ Aø©¨ø£ v¸®£¨ö£Ö® •øÓ __________ GÚ
AøÇUP¨£kQÓx.
(A) Põ´a] SεøÁzuÀ (B) «sk® JßÔønuÀ
(C) C¯À¤ÇzuÀ (D) E¸SuÀ
Forming of double stranded DNA on bringing back the temperature of denatured DNA
is called as :
(a) Annealing (b) Rejoining
(c) Denaturation (d) Melting

12. 22 {²UÎ÷¯õøhk }Í•øh¯, ]Ô¯ SÔ•øÓ¯õUPõu (non-coding) RNA
__________ GÚ¨£k®.
(A) mRNA (B) miRNA (C) tRNA (D) hnRNA
A small non-coding RNA of approximately 22 nucleotide length is called as :
(a) mRNA (b) miRNA (c) tRNA (d) hnRNA

13. Gvº BUêá÷ÚØÓ £s£ØÓ øÁmhªß :
(A) ÷Põ÷»PõÀ]Lö£µõÀ (B) ¥mhõ P÷µõmiß
(C) AìPõº¤U Aª»® (D) ÷hõ÷PõLö£µõÀ
All the following vitamins have antioxidant property, except :
(a) Cholecalciferol (b) Beta carotene
(c) Ascorbic acid (d) Tocopherol

5 3463 (NS)

14. ©õ¼¨iÚzvß EmTÓõP Aø©Áx __________.
(A) BÀiøík BUê÷hì (B) ø\m÷hõS÷µõ® BUê÷hì
(C) \õ¢øuß BUê÷hì (D) \Àø£m BUê÷hì
Molybdenum is a constituent of __________.
(a) Aldehyde oxidase (b) Cytochrome oxidase
(c) Xanthine oxidase (d) Sulphite oxidase

15. ÷ÁÖ£õmk ø©¯Â»US •øÓ°À £¯ß£k® ö£õxÁõÚ ÷ÁÖ£õmk ö£õ¸Ò :
(A) APõº (B) _U÷µõì
(C) ©õÀ÷hõì (D) £õ¼AU›»ø©k
A gradient commonly used in differential centrifugation is :
(a) Agar (b) Sucrose
(c) Maltose (d) Polyacrylamide

£Sv & II / PART - II
SÔ¨¦ : GøÁ÷¯Ý® BÖ ÂÚõUPÐUS Âøh¯ÎUPÄ®. ÂÚõ Gs 24 &US
Pmhõ¯©õP Âøh¯ÎUPÄ®. 6x2=12
Note : Answer any six questions. Question No. 24 is compulsory.

16. EmP¸Âß £h® Áøµ¢x £õP[PøÍ SÔUPÄ®.
Draw and label the parts of Nucleus.

17. CßÔ¯ø©¯õu Aª÷Úõ Aª»[PÒ ¯õøÁ ? AÁØÔß ö£¯ºPøÍU TÖP.
What are essential amino acids ? Name them.

18. ö|õvPÐUS •øÓ¯õÚ ö£¯›k® •øÓ AÁ]¯® & GÝ® TØøÓ
{¯õ¯¨£kzxP.
Justify the need for a systematic nomenclature for enzymes.

19. EnÄ u¯õ›US® öuõÈØ\õø»PÒ F]¨÷£õuø» GÆÁõÖ SøÓUQßÓÚ ?
How does the food industry reduce rancidity ?

[ v¸¨¦P / Turn over

3463 (NS) 6

20. ›÷£õ÷\õ©À RNA &UPÒ GßÓõÀ GßÚ ?
What are ribosomal RNAs ?

21. L÷£õ¼U Aª»zvß SøÓ£õmiÚõÀ HØ£k® ÷|õ´ Gx ? H÷uÝ® Cµsk
AÔSÔPøÍ GÊxP.
Name the deficiency disease caused by folic acid. Write any two symptoms.

22. APõ÷µõì GßÓõÀ GßÚ ?
What is Agarose ?

23. ©õ[PÜ]ß SøÓ£õmk ÷|õ´ ©ØÖ® Auß AÔSÔPøÍ GÊxP.
Write a note on deficiency disease of manganese and mention its symptoms.

24. JØøÓ \ºUPøµUS®, Cµmøh \ºUPøµUS® Cøh÷¯ EÒÍ ÷ÁÖ£õkPÒ
¯õøÁ ? AÁØÔØS ]» Euõµn[PÒ u¸P.
State the difference between monosaccharide and disaccharide. Give some examples.

£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. uõ[PÀ Pøµ\¼ß H÷uÝ® ‰ßÖ £¯ßPøÍ GÊxP.
Write any three uses of buffers.

26. ¦µu[PÒ GÆÁõÖ C¯À¤ÇUQßÓÚ ?
How are proteins denatured ?

27. ö»]vß ©ØÖ® ö\L£õ¼ß ÁiÁø©¨¦PøÍ u¸P.
Give the structure for lecithin and cephalin.

7 3463 (NS)

28. EhÀ ö£¸zuø»¨ £ØÔ SÔ¨¦ GÊxP.
Write about obesity.

29. G¤©µõUPÀ GßÓõÀ GßÚ ? GkzxUPõmk u¸P.
What is epimerisation ? Give an example.

30. ¤›ªiß Põµ[PÎß £s¦Pøͨ £mi¯¼kP.
List out the properties of pyrimidine bases.

31. øÁmhªß E&°ß SøÓ£õmiÚõÀ HØ£k® ÂøÍÄPøͨ £ØÔ TÖP.
What are the effects of Vitamin E deficiency ?

32. C¸®¦ EÔg\¨£kuø» £õvUS® PõµoPøÍ £mi¯¼kP.
List the factors which influence the absorption of iron.

33. xønö|õvPÎß H÷uÝ® ‰ßÖ £s¦PøÍ GÊxP.
Write any three characteristics of coenzyme.

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

34. (A) ö\À¼ß ø©m÷hõPõsi›¯õÂß ö\¯À£õkPøÍ ÂÁ›UPÄ®.
AÀ»x
(B) ¤›hõU]Ûß £À÷ÁÖ E°º÷Áva ö\¯À£õkPøÍ GÊxP.
(a) Explain the functions of Mitochondria of the cell.
OR
(b) Write the various biological functions of pyridoxine.

[ v¸¨¦P / Turn over

3463 (NS) 8

35. (A) ö|õvPÎß £À÷ÁÖ ÁøPPÒ ©ØÖ® AÁØÔß ö£¯›kuÀ •øÓPøÍ
uS¢u GkzxUPõmkPÐhß ÂÁ›UPÄ®.
AÀ»x
(B) Põµ[PÒ, AÁØÔß ÁøPPÒ ©ØÖ® £s¦PÒ £ØÔ öuÎÁõP
ÂÁ›UPÄ®.
(a) With appropriate examples describe the different classes of enzymes and their
nomenclature system
OR
(b) Detail on the bases, their types and properties.

36. (A) CøǨ¦µuzøu GkzxUPõmkhß ÂÁ›UPÄ®.
AÀ»x
(B) öPõ»ìiµõ¼ß Aø©¨¦ ©ØÖ® Auß •UQ¯zxÁ® £ØÔ Â›ÁõP
ÂÍUSP.
(a) Explain the structure of fibrous protein with an example.
OR
(b) Write a detailed note on structure and importance of cholesterol.

37. (A) Põº÷£õøím÷µmkPÒ ÁøP¨£õmøh GkzxUPõmkPÐhß ÂÍUSP.
AÀ»x
(B) ø©¯Â»US •øÓ°À £¯ß£kzu¨£k® £À÷ÁÖ _ǼPÎß
ÁøPPøÍ ÂÁ›UPÄ®.
(a) Give the classification of carbohydrates with examples.
OR
(b) Describe the various types of rotors used in centrifugation.

38. (A) _U÷µõì, »õU÷hõì ©ØÖ® ©õÀ÷hõì BQ¯ÁØÔØQøh÷¯¯õÚ
÷ÁÖ£õkPøÍ GÊxP.
AÀ»x
(B) ö\¼Û¯zvß E°›¯À ö\¯À£õkPÒ ©ØÖ® SøÓ£õmk ÷|õ´
AÔSÔPÒ £ØÔ ÂÍUSP.
(a) Write the difference between Sucrose, Lactose and Maltose.
OR
(b) Write down the biological functions and deficiency symptoms of selenium.

-o0o-