F.Y.

517

Mai·ch 2013

Part -III · BIOLOGY Maximum: 60 Scores

Time : 2 Hours Cool off time: 20 Minutes Preparatory time: 5 Minutes

-'\

Generallnstru~tions to Candidates : •

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41

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There is a !Cool off time' of 10 minutes each for Botany and Zoology in addition to the writing time of 1 houi' each. Further there i~ a '5 minutes' 'Preparatory Time' at the end of the Botany Examination and before the commenceme1it of t he Zoology Examination. ·. You are neither allowed to write your ariswets nor to di scuss anything with others during the 'cool off time' and 'Preparatory Time'. Gse the 'cool offtime' to g!3t familiar with questions and to plan your answers. Read the questions carefully before answering. All questions are compulsory and only internal choice is allowed. When you select a question, all the sub -questions must be answered from the same question itself Calculations, figt{res a nd graphs should be shown in the answer sheet itself. Ylalayalam version of the questions is also provided. · Give equations wherever necessary. Electronic devices except nonprogrammable calculators are not allowed in. the Examination Hall. ·

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1

(P.T.O .)

517

PART - A

BOTANY 'J\me : 1 Hour Cool off time: 10 Minutes

Maximum: 30 scores 1.

Observe the ·given relation and fill in the .blanks.

1,.

2.

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a) Plumule : Coleoptile : : Radicle: .............. .

a)

b) Starch : Amyloplast: : · Fat: ... ... ..... ....

· b)

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: GlcfuOg1GlWOnJ"88Rra : :

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' (1)

Botany teacher brought a diseased plant m the classroom. Manoj identified the pathogen as a virus. Can you list any two symptoms of diseases, that · helped him to identify the pathogen?

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(1)

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(1)

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(1)

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3.

Analyze the given statements and correct them with respect to the underlined words. a) Respir&tion 1s an anabolic pathway. b) The site of perception of light by a plant for a photoperiodic response is a flower.

3.

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b) G:olJOGl§O oJ1ro1mJcw1mmJ,m.l,\®QlOW1 LnJ ®1 ce:,ro1<00J,
(1)


cru cru~ 61l13 cJO

cru]la:nro1<00J,ITD® nJ~os::i"nJcorm1e.J~6lsCQJo6TI).

Match the following :

4.

a) Auxin

i)

4.

( 4X 1;2=2)

b) Gibberellins ii)

a) m@cfu'cru1ra

i)

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Stomatal closure

b) (J)161)dOOeJlffi>

ii)

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c) 6l6lcrua: 8 :J6l8cfum1cm

iii) GlOJro

d) C1tl) LD1 eJl dO

iv) Gl ffilOci0§16r3"

c) Cytokinins

iii) Root initiation

d) Ethylene

iv) v)

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(4xYz=2)

Gl.!lJ(i).!,onJS1 Gl.!lJ f.O
Fruit ripening

t

Bolting Overcome apical · dominance

( 1)

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v) arr?Jl(J)GlQlWOOJl®j8corm (())(() 6lno 6) .!lJ ~ ra

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517 5.

'Do ubl e fertilization is an event unique to angiosperms'. a) .\1ention the two fusions in this event. b) :\"arne the products obtained as a result of these fusions.

5.

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b)

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(1)

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6.

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2

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Proteins m the membrane are respon sible for facilit ated diffusion and active transp'ort and hence both show common characteristics. ·List any two such ch aracteristics.

( 1)

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6. «llll6l~a:»1am 7

7.

( 1)

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Answer either question 6 or 7. 'Unlike water, all minerals cannot be pas sively absorbed by roots '. Write any two r easons to justify the above statement.

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( 2)

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8.

'In c. pltntt , d E;fic ie nc y of N 2 is vii'iible in older parts and that of Ca 1s visible m yol.ii1ger parts'. 9 ritica_lly evaluate the statement. · (2)

8.

The diagram given below shows parts of a true fruit.

9.

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9.

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® @ a) Write the technical name ohhis fruit de ve loped from a monocarpellary superior ovary. (lf2) b) Label tf1e parts A and B .

a)

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b) A, B (5:)(1)60B CJb (llT?J S(W:)~6lillS6@'0lcl
c) Can you d i stinguis h a. par th enocarpic fruit from the given fru it? (1)

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( 1)

(P.T .O.)

517 10. An accepted model ofthe structure

of a cell membrane was proposed ·by ·singer and Nicolson. m1 CJ c00o cfbCTlJ sm6o

a) N arne the model.

(Y:z)

b) List the 2 major biomolecules which this membrane 1s composed of

a)

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c) Mention two important points of

this model from the point of view of function. .

c)

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11. In the anatomy lab, Eugin observed the folbwing features in the T;S. of

a plant part. a) Ra d ial and . polyarch . xylem bundles

nam

. 11.

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a) · CJocw'lm;r
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b) Parenchymatous (homogenous)

(1)

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d) Epidermis with unicellular hairs

d)

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e) Pericycle

f) Endodermis with caspatian strips . . i) Identify--the plant part.

ii) · Re-arrahge the given regions from the periphery tu the center in sequence.

their

correc~

iii) Give an account of casparian strips.

(1%)

iii) cfuO
(1)

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(1)

517 2. A diagrammatic view of a cell cycle is gl.ven below.

12.

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a) ®06l':P
a) Identify the phase in which :

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i) DNA synthesis takes place ii) .Chromosomes are arranged at the equator of t he spindle

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i)

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(1)

b) · ldJ:>Q)(5Q(/)(IT)'ID16J~ .

of mit osis in t he life of an

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(1)

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(2)

b) 6l6l ~ c; cOO o~1 cru1 cnf 63 0 dl:lucru"l dJ:, (() 6lTl mp:uJ!dl:lcc1cOOJ,dl:l.

7

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(2)

s.) Locate the site of glycolysis and

b) Glycolysis is a partial ox:ydation proces s . Justify.

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(2)

B reakdown of gluc ose m respiration 1s li s ted under glycolysis and Krebs cycle.

Krebs cycle in the cell.

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b) Mention t\vo significant points. orgar..1s m.

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(2) (P.T.O.)

517 An swe r either question 14

or

15.

14 . C,; plants are adapted to overcome

a wasteful process foun d in

1 4-15

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14.

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a) C 3

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c

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(

1)

b) C, toJLJbi 0CJO~G1>

(1)

(i)

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c) Write any two differences C~, plants .

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b) Identify the cells involved in th e

between C8 plants and

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a) X a me t he wastefu l process

c~ pathway.

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·yields are better in these plants.

c) plants.

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plants and bence productivity and

fo und in

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c)

(2)

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1 5 . Light r eaction is oth erwi.s e called

15.

LnJJbOCJO "f>J3(6'(Q}'l@
photophosp h orylation, a) J ustify the statement.

(1 )

b) Locate the site of this. reaction.

(1)

a)

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b)

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( 1)

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c) 6)6)mJ~1cfu' GlnDOOi
c) Wri te any two diffe rences

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between cyclic photoph ospho-

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rylation and non- cyclic photophosphorylation ..

K-47

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(2)

6

(2)

PART- B

517

ZOOLOGY Time: 1 Hour Cool off time : 1 0 Nlin u tes

Maximum: 30 scores After co:11pleting a project study based on di\·ersity of spiders, the specin1ens were inten d ed to b e stored for future reference . Select a suitable taxonomical aid fr om th e following for the pres ervation of sp ecimens .

· 1.

a) Herbarium b) Museum c) Zoological park d) Sanctuary Justify your answer; A person with A -ve blood group is injured severely in an accident. His r elatives with A +ve and B -ve blood groups were ready to donate blood for him. In fer · the consequences if h~ receives blood from thern.

(1)

2.

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(i)

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cooH ·

3.

COOH I

I

H-C-NH" I

H-C-NH"

.

-

H a) Identify this compound.

c) · If a number of such molecules are bonded together, what will be the r esultant molecule?

I

-

H a) · §2'D 6llJ
e ,2)

g)2 ctJ® co @1j)'1

b) Name the bond produced when · another biomolecule of the same category combines with this. ( lf2 )

47

(1)

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e;2 >

6llJ Cl (QJ:)(Jl QlO@l dhJJcib.

b)

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em o Cl cw og-;;'1 cOO6Cl cru o cib Cl6W06TYS" Q@@Ooffi?

( 1f2)

. c) §2@1llCOCOiOflam6l<;tj3 . 63COJ,nJOS ClalO@ldhJJcib cru o Cl w o ~1 cOO 6cg cru cib ~am<;tjc'rnClQl@:)6ffi"?

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( lf2) .

(P.T.O.)

517 · 4.

5.

Observe the following representation and fill up the blanks appropriately. (1 %)

4.

Pick out the wrong one and justify your selection.

5.

a)

6.

Cl5l06)
6l©RJ,~Cl5l"

Cl5lt
m~omJlce:,ro1c£76)J,cfu
( 2)

( 1 Y2)

{ 2)

· VC = ERV + IRV + TV

b)

TLC=VC+RV

c)

TV = 500 ml

d)

ERV = 3000 ml

Observe the graph showing the activity of an enzyme influenced by pH.

m.lJOWimo

· m.l~!.l..!lc;:tJ1c£76)6cm

. m1roic£h'l:l1c£76)J,cfu.

a) Name the possible enzyme involved in this reaction. (Y2) b) Where is its

site of action? (Y2)

a)

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(1,~ )

b) . ~©16lc(fj ln_jOJ/O(OTO)m

(Y2)

· ..,.... f

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c)

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any ·2 4 b factor other which affects PH this,enzyme activity that results (Y2) in a similar pattern of graph.

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-c) Mention

d) Name another similar enzyme actirig on the same substrate.

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(Y2)

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( Y2 )

8

517

i.

In a Bio l ogy nlass related to

7.

· exdetion in the human body; a

Ql0l6
~ofmico'IJ

6311l6 o.flB~offimo1

student gave an opinion that in

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every minute about 2% of the total

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voh1 me of the · body is

bloocl

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2% GFR arr0mll O.l086l\Bs6rm.:l. n.Qfmoco'IJ

conven e d to GFR whereas only

GFR

· l% of rhi::; GFH is eliminated as ·

m~

1%

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urine. Evaluate this opinion and

g;Q 'n

arro cs1 l'Ll oco; 6l w.m

ru1 eJ w: i1l6 cnm1 ·"i;

substantiate your answer.

. 8.

Observe

the

(2)

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8. .

str1.1ct u ral

representation of the muscle given

ln.J@lcBol1l6ffio

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( 2)

tm06l':l' 6lc£bOSJ,mnJ1m1G006(ffi (gn.JCJblc8:>§66>S o.eJsmO nlll®ic£bl1l6ffio m'1ffilc.e,sjlc£h,'J6c£b.

below :

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I II I I

J

I

eerl

I I I I I I I ,..

-

I

t h e contracted state?

( 1,12 )


(12)

b) A,· B,

b) Name th e parts labelled as A, B and C.

rru cz ffi> :; .2.1 oru cr.m 6l CQJ

a) n{j3(lj):)6ffi"

a) Wh ich among this represen ts

K-4 7

!

.j

( 1 1 2)

c

rs::>WG013~6ls

9

nti) ems w og 6l ~ s 6cnm1w

C8cL16li1l'96@6cfu.

( 1 1,12)

(P.T.O.)

51 7 9.

Fill the table· appropriately.

L I I


Site of production

Horme;

Gastrointestinal tract

r

r

Erythropoietin

c).. .... . .

;<.

9.

(l)l®lCQJ1af6

a:smil cib

GJ2,(l)1~c006cfu.

CCK

I

I

(2)

I

I I

[rTH

I

Function

_J

a) ~· · ···· ······ . RBC form ation

b) ·· ····' ····· ····· ·· · .•

(2)

H eart

Redu ced BP

d) ...... ........ ......

Increased blood Ca2+

10.

HL

_ J \._ a) Label PQR ST in the graph. b) What does the T wave repres ent?

(1 )

PQRST

(1) (1)

b) T czOJoJ ln.J®1-m1wlce,co1c006cm6J®mD"? lnJ cro co 61Tl OJ6m oWl

a) 6>6)cro mo nJ"R1ce,"

b) ffi'®dbnS:1cit 6>nJO§citnS:1Je.D6><1Jl oJlce,ocroo. c) Na+-K+ n.JmJ lnJOJro
c) Na+-k+ pump starts functioning

d) ffi'® cz OJ (I) 6013 §.6 6> s cro]ice, ro 61Tl OJ 6o N a "'

d) Stimulus received and influx of . Na+ ions



ln.J
e) Binding of neurotransmitter with postsyn aptic membrane

K-47

@rucro1c001§_1 @<1Jl

6)n.JO§af6.

b) Development of action potential

of

ffiJ crw 6>c;;j § ln.J lce,1CQJcfu6) ~

lcfuQ)OffiJ,(I)®Q)OcOOJ,cfu.

.a) Bursting of synaptic vesicle

.lVIai ntenance potential

(1 )'

11. ®O@Y' 6)cfuOS2,co-®1ro1c006rm mocul'ICQJ CU@
11. Arrange the following processes in nerve impulse conduction 1n a sequential order.

f)

O{j) cm10J

m 0
Cl LnJ c£hlj ce, 6m3 cib

6)6)cromo n.J"Rice,"


cro"®co OJz,m owi

croo
resting

f) 6>0m)R1ocr:l 6>nJO§
10

( 3)

517 12. a) Pick

out

the

acoelomate

organism from .the following : i) Roundworm ii) Hook worm iii) Filarial worm .

i i) (1)

iv) Tapeworm

a: OJ 0

iii) 6l6lnDeJOo1cwcn?l a:ruo (1)

i v) <8s<;t)' a:ruo

b) Name the phylum to which it belongs.

cti'il:,rf}())

(Y:!)

c) Mention its mode of nutrition.

( Y:!)

(Y:!)

d) What is the coelomic condition of

organisms?

other

Substantiate your answer.

(1)

13. During a seashore visit, a student 'collected two organisms. Observing the morphology, it is clear that the organisms

a-re

mJOnDJneJ sm

m1all an'l:fl8,]
radially
symmetrical. One of them shows bioluminescence. a) To which phylqm does this organism belong?

(1) (1)

b) Identify the possible phyla to which the other organism can be (1)

(1)

included.

c) [Q'"O

c) Which distinctive feature of this organism will help you to categorize it into phylum?

47

a particular (1)

(1)

11

. (P.T.O.)

517 14. a) Ar range t he following organs

14.

in the antero"posteral order

a)

@ ::> 6l':l'

nJOWJ,rm .

(1ffi)OJ
mGJ.D,1ffimJ.!,6lS CJ1lffi"lm<0®16lolJ

~"c(q'iini w te

of the earthworm body : Intestinal caeca, gizzard, blood glands, testes, ovary, clitellum

is

an

st rategy

1n

b) Vermicomposting advanced

(3)

cfu ~ Cl511

agriculture. What capabilities of

K-47

cru lm.J BomJ Ql Dmf m6p;jl ro mJ 66l S

0{)3 6) (l}) ~ 0 0 'cfu '91 (}j 6cfu ~ 0 6ffiu gQ OJ16J S

th e earthworm ai·e utilized in this strategy?

(3)

(1)

12

~nJ~(Q)0Cf)6l~S6®lilJ,ffilmJ'.

(1)

1,81,800