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t 5 t ISc ience

Ogos /Se;ltenrbe r20I t)

.IAI}ATAN PE,LAJAITAN NEGEIII TE,II.E,NGGAN U

PI'P.IIITII{SAAN I'IiRC U T}AAI\SIJIL PAI.,AJAITAN MALAYSIA 20TO

SCI ENCTi

MAITI(II\G SC]HITN{E

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t )' I 'otal rrrnrk lor Papcr 1 ; 50 lnal ' l is

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I : lccIr ' ical oncfg,y i l i prot iucctl'/'a

rttt,grt c lr:kt r i lr d i lt r ts i ! ktut

t" l '1 'pc r: l) pair ol 'nrctais1', i cr t i s) ltct.r tu i !_{{t t t I o gu t t t

VoItrncter reacl ir tg / [)roductiorr ol ' elcclr ' ical c ' t lc l 's]/Ru<-'cttttt vtsi|nre|u' // I' cnghu,si Iort Iertitgo e/ektrilr

r.).0 1v.1

Steel nai l is morc corrosivc lcsisiarrcc t lran iron rrai lI'rrktr ktluli lcbilt tuhun kuki.turt lrc.rfurttling pulru be.ri

( i ) ' [ ' r 1 t r :

r r l ' r r a i l

, l c t t i . i 1 , , t l i . y

( i i ; \ /ol rrrtrc o{ ' sot i i rrr i i chl ori t lc sol rrt ior i / /si zc ol ' rrai I

L: i1n ul t t I t il' t I l tit t rtu I t' i t.u t t li I t t r i I rti'/',.r tti z 1 n h t

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l l t l l , i ' l '

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l \4rr l l t {V}irt brass sitxr-r lr l r t ;rrr. : rurt l l ) t ' rr t t ,rc rnccl l l / ' l 'unrl t t

111 ptula.srtk,tof i tr t l i l \ ,1111,,r ir r t t It it tHrtl i:ur t1sit l l r t

i t l n t r ; t i i i : ; i t sL t l ; s la t r cc L l t i l t l i , r t ' t t t l ; r ' o r . v r r t l t r s l ( r v l r c l s ;oa l< r - : r l i r r r ;< ld i r r r l c l r l o i i c l cl i t ' l r r l i o r r )

| ,u | i t t i l t : , r i , i t t i t t | tht t | t i t | I - ) : t I t l f | | | lL : t l t l l t ' : t l i l t

I ttt l t ' i t t In k I rtt ' i Ju)

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l r4arkirrg schonre /

I{ubhcr str ip Q is lot i l ;crt ' t l rart rublrer sf r i l t [) / / vics versa

.Julw' gr:tah Q lchih ptutjuttg beiltuncling.iuhn" getult I' // ,sebuliknvct

2,ll I 0. I crnll IJcrtlussrkun ukurttrt \xulu kurlus ,ttxian sebenar

l{Lrbbcr str ip Q) i : ; rnorc clast ic l lv ice versi},luitu' ,r1t:luh Q lebilt kem,ul. /i s<tlsalibryct

( i) ' l ' , r 'pc

of ' t r-rbbct ' st i ' ip,leni.r,julut' gt'tult

( i i ) ' l 'hc clongi i t iolr oi t 'uLrLrer str i i rl ' artrutt i utt 5yut, i u lur get uI t

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l 'otal nlarl<s frrr Sectiolr A

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St JL, I ' f l v laLk ing sc: l ie rnc I l5 I I l ' l ' r in t

201( i

' l 'o ta I

To l i r l

I iECT'IoN tf

5 (a) z\rrattgc:cl in irrcreasir.rg prot()lr nrrrritrcr (l iolrr lc{i to riglrt )l)i,tttstttt mengikut 1tu'ltnnbuhan ncnnhrtr proktn (duri kiri ke kunun)

t , ) i ) Mctal / / ' l 'nuis i t ion e lcrnerr tsl, r t r1a1111 /,'' U t t,s tt t' 1 te: r u I i h r.t t t

c )

i i ) L i

NIctal to txrn--rrretal{-ogtttrt ka ltukrut logant

(. ' l tcnr i clr I cl rarirctc:r ' i s l i cs I I cha l 'nctcri sl i cs ol : gascous,\' i I tr t -,s i /u I k.i n t i ct //,\i / rr | - s i f u i yu.t

P atttl S /i (J anrl 5i

K ; Wlri tc l l ' t ' i , t i . l tL : [ ] luc t l l J in t

i) I.lluc ii' Ilirui i ; Yr: l low l l I ;utt [r tgi ) S i a nii) lllack ll flitant/Gelult

I ' a Jn r o i li,l i n_1, q ls ,t r tttt i t

Saponi l lca l ior r,'t'r t 1to t t i.f ikus i

( c )

' l rr clccn. ' ;rsc t l te solubi l i tY of : ioap// ' t ' , . , 1,r*" ipitate thc soalr

I.ltilult ntL:il!:uruut,qluttt kctcrktruturt s'r'tburt.// tlnlu.kmemetulukkur subutt

\ ' . l : lvclrophobic// '1 'ai l

port iouI I i ti t'tt li t I t i L ii I I u httgi tt tt r: k ot'

Z : I lvdrop l r i l i c / / hc iu l por t io l rLl i,lro.fiIik /i lsultugirut hr:lsultt

zl / / l lvdrophil ic ! l l -x: iul l rort iorr7', lt' Jtitirolilil; ,t/ ltultuStiutt kt:1xthr

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lVlarl ; . inc schctrte I 15l,1l l r ial 201()

Nctt rveightlJt:t'at ltersilt

l l rcc,: . ingIt t: t t.t' t i u/dt t, kt n r t

' l ' , l r er r ru ls i {y t r r ,o types o l ' l iq t r i t ls

sr rbst lr tccs l i 'orn prcciPitnl i rrg..

I r i r

[ jt ittkln.tni:uttrl itmdur'l.. jani,rlurlt| ' t ' ttt

uir i/urtlrrk tttc ngltulurtg luhut I ertcttht lernrt:rtcluk I t r r

i) I 'c irrcscrve fbod i i ' l 'o ki l l bactcri ;r ipcltrdi lr l l al l t l rc 'spc'rcsl/

L)cstror-s cnzylt tcs l l tnt spoi ls fbocl.Lhtttk ntatrguu,el mrtkrntr i l r l lLlnluk tncmhwtult buk.leri t t I .ervtrts ' t tk,rL;t t t ;n

s: l ) o r u//i 1\'l (lt t t tt s n u h kttt t e n z i m -J' ct t t g b o l clt m e r r x u kka n n t u ka n a n

(i i ) Spoils t l tc taste ol ' l i rcrcl/ /Dcstroys Ibod ntrtr icnts

tr[crosak.katt r(r,\(t mukcmrut,'/h4cnrunuhkon nulriett tlul.un ilt.uklillutl I tlt

l 'o avoid fbocl poiscrrr irrg / /To et lsufe the fbod is safb to eat i t i t

tJnltrk nietig,,:lukkatt ke.rut:tntun ntukunm/tUtttuk ilientLt,ttikur: niukltrttttt ilrr.vtlutnrtl

dt nutkun

lirl nl { r l l r

( i ) Q I i t t

( i i ) P// Tcrrnoplastics i t tr

i l igh rnclt irrgl/ troi l i rrg point// can Irc rernor.t l t lc( l otr ly ottu:e// l tas cross l inl<age']'u|cu|ichridir|ih'|d||g|ing1.1i',,ibolchtiit.tcu,st:ku|[

l i r r

I )o I !'r: I hc ncilllo I ys tvr.e rt cill 'c rs 1;cx//l'V (l

l 'rtlitcrt,.ii,/ l 'oli,rtirenr// l 'ers1:ek,s// Itlt(' I ltr

Mlr l t 1V) at svatr l)or,r 's; bott lc altcl plast ir-: platc'Ji.nttlu (,i) yt,trlu lsolol ,s)tcrntpu tlurr llittj:gun plustik I tit

l i laslr l lc.xtt l l l ' l ' l re breerl irrg of 'rnosciuitoes irr thc dra. inl lClugged t lrc dlairr i /

l )angerous to t lrc irqLratic arr irnalr i / / poisonutts ga$eotls pt 'oduccd $rhg:tt plast ics at 'c l l t t t ' t t l

Btuliit.kiictti/Pelnllirtkotttt.-|,rttnttktlic1ulntt|ongkung'i/l 'clngkcutgtLlr'lttnl|ta|//Iuiv,utr ukuttl ik/,/ I ' Iustiktl ibulutr tttenglr,t,silkutt gtt 't bet',tctnt I r t t

( r l l l

- tr{} l r t ; t l ' l ts

s ; r i t , l ' l '

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I r n

lh i i l t lo not rn ix/ / to errr t r ls i fy ' o i l ar ld wi i ter / / lo l ) rc\ /c l t l cct l l i t t

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Tol i t l ntark.s for Scctiolr B

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10. (a) ' l l rc

grtr.vt l t ol 'bactct ' ia is oyrt irr trrtu in rrerrtrnl contl i t ion//at pl l 7l' t: r lur t t lt uh a n h u lr I e r i u a cl ul ult b o i k/c e r gos tl o I un lce tttlu u tuaulrul/ I.ttnlupl{ 7ifi)acLeria p'.rorv attcl nrultilll.v lasl. irr neutlal rneclir.un/itt pll 7i ,1lJttk|cr i t t t tnnbultdtt t tnlcm|l ir lAt]t :nruttCq)i[dt l i t t t t t t1leL'| iu' |?l t tr : t i rul ' i /1tt

,Ait t t ol 'cxpcl i in,: t t t * ' l 'o slrrdt ' t l tc: cl ' lcct ol '1l l . l valtro ott thc 5lt 'orvth o1'tractcrirr

Thjuun r:li,sTterim',:tr - i4urpiltu,ii lie:;urt. nllui ptl lerltutltrlt pe:rtutnltuhtutl i t t k lc i ' i t t

i i i ) \ / r r ia l r lcs / [ 'c r r r l ro lc l ru lx l t

ri t_r t.l't'

|jflC]'I0N C

i : i l l

( i I1lr)

f ortstant

Din,tlurkctt

Manipu la ted

Rcsportcl irrg

Bcrg,:r'ttkbulu,s

Nuf t r r - : r r t l r ro {h * I iac tc r ra

c u , t u t c

I I l r r l l r1 'c l ro r : l t l r l r i cacir. l r ; i r lul ir ,r l r

- 'J 'hc growth /JteploclLrct ir tr trlLrtricr.lt brotlr

^ 1 tr:t'lr trrt lttl tun /ltentbiuhunkc:kt:r tth un bultur ttutr iut

Vlarkir rg schenre I l5l l i ' l -r ial

20 1 ()

of ' bactcriar/ l 'he ckrLul ir icss o f

huktcria//

I r r r

i i l t

s l l t . l I

- ' l ' l rc 11,11c ol ' lxrctet ' ia / / volutt tc of nutl t ' iert t t Lrroth //

vcll urnc o l' bactcria c:u lturc-'- _jcni.t bul;lu'itt i/ i,siltcttlu bul.tu' tnilriar// i,sipadu htllur buitt:t'iit

- l l ' l rc pII r ,aluc l lAcid hyclrochloric. sodiunr hydroxit lc arrclcl ist i l led rvater

Dinrutipulusikun - Nilcti pt{ lt',,lsid ltidrctlelorik, Nutrium ltidrt*sitlu tlttn uir ttrlitr,r.;',

Any trvo corfect { l ls\,ers

i ii i ) | ,i:;i r.rl' alrparaf trs/itr atc-t'iitl/,\'i ]nttt't ti rt rr lu:;4ttth tttt' l ' I r lcc

s l . r i l c tcs l " t r rbcs. s {cr i l i s r : r l r r r r t r icn t bro t l t " s t r : r i l i sc t l i :o11ot t rvocr il iydrochloric acit . l st i lut iorr, Sodiuttr hyl lroxidc sr: lut iott . di .st i l led r,vi . t tc ' t '

rnr l hnclrrr" ia cultrtre' l- igr.t

tuhutt i i uj i ,r t t :r i l , lJtr lntr nult ' icn:; ler i l , kelt t t , t ,r t t ,r i l ,I ' t t r t t | t t t t t1'sf |hit . i t . t lA:| lr ik.[ ' i l t , t t lct l t iVu|l ' i t t t t t | t i t | t , t l | ;si i t t , ,4ir. ,su| i tr

I n l

tivl Nicthocl/ftat:dult:,,\blc tCr stalo tlrc'. 1ll'oc:r:clurcs c(,)IroCtil,

l)1 J

, l i r t

,.,-'- '.:\. l'ilr-,'a,tf \

i l1, .* - - .11 r . . . ' . , . , 1i

I : . r r ' , i lt lt , II . r ' ' . : It ' , , . I

tr. : :; :,,',.f

, i ' , ; l : : t '

I t r - . . r - " ' lt l

rli

- --:'- 1, li ii tl " j'".......-,

IIII

Nrr t r ie r r t b lo t l t + l lac lc : r ia

cu l t r r re

| | r r r l S t r t l i r r n r l l r , t i n r . r i t l e

s r r l r t l i r ln

6

J , . .

I ' - : , - - :

II

tt . t

N r r t l i c r r t l r r o t l r r l l i r c t c r i i r r 1 , ,c r r l l r r r c I

v l ) t l' i I ml<l is t i l le t l rvr t r : r \ pt .z

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SJ LJ I.,I'I'

1 5 i l

l v lark ins sc l teme / I 5 l 1 / - t ' r ia l 20 l t )

' l ' h r . cc t cs t t u t res . ,A , t Jan t lC i s l i l l ed i v i t h l hesa rnevo lumeo f ' uu l r i cn l i r r o i l t r r r t t l

hirctcti a cultut'er// Di agralrtT' ignlt t l .nutg tt i i ,4. J] t l t tn( l l i i ; i i i r tyi , .r( lptt t butt. \ ,ctf t t lcn.1,,tut l tul tur r i t ' i ( ' t t r l t t tr l ; t i l l r i '

l 'ttthlt:r'iu i,/ (;Ii' l '6c

test ts6c A ;s udclci l rvi l l r I rrr l l f [yclroc: lr lor ic acid r;ol ir t iut i , tcst lr .r i rc ] ] i r ; rrr- l t l t l t r t l

l rsl Spcl iLrrn 6.1,d1'1rol1[1yf ic solut i i l r arrd tcst tutrc C] ir i acl. lct l r 'v i t l r I nr l Ll ist i i lc i i

lvatcr /Diagranr'l'cthtmg

ttji tl tiitotttlttlt I nil luritlurt,4,yil\ hiixtliL,rik, t(thn+: itii I] ifknnl;uh | ;:il

I t tr t t t tr t t Nti t tr i tryt l i t l r t tk.t id:t r . iurt tult tut l l ui i O di t tunbult t lettgtt tr I nt l ui t ' ,st i l i t r : , ! .

/i GIICovcreraclr t l rese test tubcs tvi t l r sl"err lc cotlott tvool plrtgs atrd placc thelt i i r i t lat ' l i

concl i t ion // Diagrattt'ftrltrl.t lrt,ligct-li,qtt tcrbttng ttji tlugttrt ltr:rttttttlt krqtas .ttr:ril iltm ictuk tli lctttltitl ,1tlrr7'

ii Gtl'f[tt:

cloutliness o['rrullielrt brolh is obscrvecl lrrclrecorcled aller lu'o/tlircc ilrty'r'

Iiakc:lilrrut btfutu' rtttrien Jipcs'hati tiln tltrekttrlhan,;elcpa,s tluuit.fliti lttrt'i{

t--_*- -'-liitiaruc

I Nitui pIII - ,_ - - -_ .____

I z 'rcicl ic/ i J-yt lrocltoric acicl solrrt i t tn

I llL:t'(tsi,li lttrrtlrttr ,t,tid ltidrrlilrt ikf . ; - : :

I f ' ' tnt i t te/Sorl i trr tr h1'drtrxi t lc

l s o l u t r o n

, : l i t I

Notc : Accept 51gJl I - slep 3 in r l iagl 'nnt( r , ) ' fabu la t iouofc l i i t ^ ,Ab lc to lornr thetab le rv i t l rnran ipu la tc t lvar iab le ; t t tc l tcs i lor t t l i t t t l

varinblc t:t.lrlc.ctly

tiiirr i,f *,i iri*.* oit*il.i.i* Ttiiri' gi'u tt, t f i ir l' lt:r r: t c ri I r

li e lic r u h nn r r ulr i e n I I\ rt m n h ul t n t It u li t t r i it

ru lct t t Nul t ' i tu t t

7li)iiriirlcti,it.i' i i

, l i r s t r l i t t ,u .

' l 'o t : t II l ) i

l ( i r r r

t. t.s-l_II

l " - ' i - : , r , , t i , ru , r , , , u , , , i r , r i , , , , I l ) isco l t l i r l t t * t ts v i t t ' i : t l io r t

t"-1-I i -r , . ," , rrol shorv obvious cl i I l 'ercrrcos irr I Shorvs uLrviotts dif l -ercrrces irr

I cir : i r .rre tci- isl ics / ' l ' i t lLtk t tu:rt tujulckrut I clxrracterist ics I l {erruniukkur ytar

L

| 1,,, A,,r,,,, tt ,silctl .rtng.i,tltt.t

I'tilut .Ytttt{"iaius

| 1,r,,'lrr,;,,,rut ,silctl .r'ttrt14.i,tltt.t

I'tnut .))tttt{"iaius

i--t----I l r i i l , rc,,c.cl l ry crrvirprrnrcntal f i retors (antl I l r l f l t rel lcecl lry getret ic f i rctors /

| .,*l'r.,ie trrctrrr':r) I l)iTteugunhi olalt.fitkror' I D4,"ttgrmtlti t-tl.elt./aktrr gcttt:tik'

| ry:'\,\/,',:'yl!,:!-!:!::!,'. Eerllt'kl -- + -- ,lr:'y,\l',:yt!,:!-l:!:&,, ff!l!:lkL-* + -- ,l li B1 - r,gl'J :Jl!'lt!v!::jj\!'!l!']J- -- --l- trrlteritcd i llyyuL

Arty two correct allswcrri

') nt

r i l r l , l I

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S l l l , l ' l ' I \ ' l a r k i ng sc l t c t r c i 151 l / ' l ' r i r l 20 l t t

'l 'rvo iirrlltlrtiutce ol'variltl"ion lll)ttrt k.t'lrcrttitigutt t,tn'itts'i

Lur i r l l lc c,acl t i t rd iv ic i t r l l c i l '1 l tc sat t tc spccics to be c l i l fcrcr l t

A,kn fi t: ru li. rt t i,\' Lt I i iq ) i t u J i v i il u d tt I u t r,t 7t c s i a,r I d ryi s Q t 7 | d'

I - l r r : ;urc thc sui ' r , ival o l ' the s i lec ics

A { e n ru:; I i k i t t t ket n u t t t l i r i r t n s 7.t e's i t' t;

l ' ro i l r tcc int l iv iduals t l tat cat t at l lp t 1o changcs i i r thc envirot l t t tc t r t

l+l+.;nglru.;i l lrtrtt intl it, it lu.t:,utg lnltt lt ntt:t11,r:,struikun tl it ' i t lu/ant ltersckilttIutt vdtt{ bcrttlt<rlr

r \ t r ' , , t r i ' { l crxfcc l ansr, ,c t ' l i i / t \ l t t t t i t - t t t t t t , t t t l t ;u i t t t l 'upul l . ) 'u l ry: bcluI

(Lr)Trvo cotruttott charactcrist ics :

lJocs rtot shurv obvious diJ-fi:rettces in cltara<iteristius;

fitlttk tnentul ukktnt perlsczrtcttt siful );utlf: i ela,:;

Ini ' lucrtcccl by gclrct ic attd cnvirotrt l icntal factol"s

[) ipr : u lqrl r u h i o l t: lt ./ hk t r t r gen c t i k cl u t t .f it k t or 7t t: r s c ki l ur ort

Ari6tlrrrr cxnrnplc : Intclligcncc //lengtli ol'hirir (kel)inturdn /ipattjattg ruttbul)

any acocptablc iulswcr

Norr-cxarnplr : 'l 'ypc

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