[myschoolchildren] skema biologi percubaan spm 2012 sbp q.rtf

8/19/2019 [MySchoolChildren] SKEMA Biologi Percubaan SPM 2012 SBP q.rtf

1/27

4551 BIOLOGIKertas 1, 2 & 3 Ogos

2012

BAHAGIAN PENGURUSAN SEKOLAH BERASRAMAPENUH DAN SEKOLAH KEEMERLANGAN

KEMEN!ERIAN PELA"ARAN MALA#SIA

PEN!AKSIRAN DIAGNOS!IK AKADEMIK SBP 2012

PERUBAAN SI"IL PELA"ARAN MALA#SIA

BIOLOG1

PERA!URAN PEMARKAHAN

__________________________________________________________________________________ This marking scheme consists of 19 printed pages.

Peraturan pemarkahan ini mengandungi 19 halaman bercetak.

4551 $ BPSBPSK 2012 [See next

Muat

turun

(percum

a)sk

emalai

ndi

:

%%%'(s)*oo+)*+-

re.)o'M

uat

turun(p

ercu

m

a)ske

ma

laindi

%%%'(s)

*oo+)*+-re.)o'


2/27

page [Lihat halamansebelah


3/27

BIOLOG# 4551 2 MARKING SHEME !RIAL SBP SPM 2012

PAPER 1

No A.s%er No A.s%er No A.s%er No A.s%er No A.s%er1 11 ! "1 # $1 % &1

" ! 1" % "" # $" &" !$ % 1$ # "$ ! $$ ! &$ !& ! 1& % "& $& && %' 1' # "' $' # &' # ! 1 " % $ ! & % 1 ! " % $ # & #* ! 1* % "* # $* &* !9 # 19 % "9 ! $9 # &9 #1+ "+ % $+ # &+ ! '+ %

PAPER 2

/esto. 1

Muat

turun

(percum

a)sk

emalai

ndi

:

%%%'(s)*oo+)*+-

re.)o'M

uat

turun(p

ercu

m

a)ske

ma

laindi

%%%'(s)

*oo+)*+-re.)o'


4/27

MARKING SHEME 4551

No rtera Mars

(a)(i) !,le to name structure la,eled-/ and 0. !nser :2 - : %ell all2 / :% to lasm

1 1

$

(a)(ii) !,le to state the condition 4of cell. !nser: Turgid 1 1

(,) !,le to explain ho conditions 5 and 4 occur. !nser:

%ondition 5:2 %ell is in normal condition 6 maintain its shape 6not change. 2 Solution outside the cell is isotonic tothe sap cell of plant cell. 2 7ater diffuses in and outof the cell at e8ual rate.

!n3" %ondition 4 :2 Solution outside the cell is h3pertonic to cell sapof plant cell. 2 7ater diffuse out from the cell ,3

1 1 1

"

1

&

(c) !,le to explain the eect to the transport of mineralions into the root hair cell.2 The cell una,le to produce energ3 66 energ3 isnot generated 2 !ctie transport does not occurs.2 Thus mineral ions cannot ,e transported into the cell.

!n "

1 1

"

(d) !,le to dra a diagram to sho the conditionof a leaf cell. 2 #iagram2 ;a,el :

-lasma mem,rane

11

"

!O!AL 12


5/27


/esto. 2

/esto. 3

No rtera Mars

(a) !,le to name structure 5and 4. !nser:2 Structure 5 < -ectoralis ma=ormuscle 2 Structure 4 < Tendon

11

"

(,)(i) !,le to explain h3 structure 5 has an a,undance of

mitochondria. Sample anser:2 Mitochondria generate 6 produceenerg3 6 !T- 66 Structure 5 needs a lotof energ3

1

1

"

Muat

turun

(percum

a)sk

emalai

ndi

:

%%%'(s)*oo+)*+-

re.)o'M

uat

turun(p

ercu

m

a)ske

ma

laindi

%%%'(s)

*oo+)*+-re.)o'

No rtera Mars

(a) !,le to

name.!nsers:2 -hase S : -rophase 1

11

"

(,)(i) !,le to explain the chromosomal ,ehaiorduring phase S. Sample anser :2 %rossing >er2 ?xchan e of enetic material ,eteen homolo ous

11

"

(,)(ii) !,le to explain ho the chromosomal ,ehaiourcontri,ute to the surial of an animal species.Sample anser :2 (crossing oer) causes ariation to occur amonganimal s ecies 2 This ill enhance the a,ilit to

11

"

(c) !,le to explain the chromosomal ,ehaiour duringmetaphase @ Sample anser:2 Aomologous chromosomes arearranged in line 2 at metaphase plate 66

11

"

(d) !,le to complete the diagram of the daughter cellsand explain the occurrence.Sample anser:

B 7

2 #raing :B7

2 #uring !naphase "2 Sister chromatids (of one chromosome) is not

1 1 1

&

!O!AL 12


6/27

MARKING SHEME 4551


7/27


(,)(ii) !,le to explain the function of structure 5 inlocomotion of ,ird. Sample anser:2 5 contracts2 %reate pulling

force2 To ull the in donard6don stroke

1 1

"

(c) !,le to explain the effect to locomotion of ,ird ifstructure 4 is torn. Sample anser:2 (-ulling) force (that created ,3 contraction of

muscle) cannot ,e transferred to the ,one.2 one cannot ,e pulled donard.

1

1

"

(d) !,le to state to differences in structure ,eteenerte,rae - and erte,rae /.Sample anser:

!n3 "

11

1

11

"

(e) !,le to explain the relationship the dietand disease. !nser:2 Ae suers gout arthritis2 #ue to deposition of uric acid inhis =oint 2 Ais diet contain a lot of 6excess rotein

1 1

"

!O!AL 12

/esto. 4

No rtera Mars

(a) !,le to name the structure of0 and S !nsers:2 0 < ;3mphcapillar3 2 S <

11

"

(,) !,le to explain the formation of l3mph. Sample anser:2 The high h3drostatic pressure at the arterial end ofthe capillaries 2 Corces ,lood constituents exceptlarge molecules diuse out

(through capillaries) into intercellular spaces ,eteencells 6 to form tissues Duid

2 !t enous end of capillaries here h3drostaticpressure is lo 2 (9+E of tissues Duid returned tocirculator s stem and 1+E

11

1

1

$

MARKING SHEME 4551

Structure - Structure /Smaller centrum ;arger centrumAas erte,ratrial canal Aas no erte,ratrial canalAas no F3gapoph3sis atthe transerse processand side of centrum

Aas F3gapoph3sis atthe transerse processand side of centrum

Aas short transerse Aas long transerseAas large neural canal Aas small neural canal.

Muat

turun

(percum

a)sk

emalai

ndi

:

%%%'(s)*oo+)*+-

re.)o'M

uat

turun(p

ercu

m

a)ske

ma

laindi

%%%'(s)

*oo+)*+-re.)o'


8/27


OR2 ;3mph originate from tissues Duid 6 interstitial Duid2 !t enous end of capillaries here h3drostatic

pressure is lo 66 A3drostatic pressure is high in the

interstitial Duid2 (9+E of tissues Duid 6 interstitial Duid 6 5 is returned

11

1

(c)(i) !,le to state the disease hen Glarial orms,lock essels 0. Sample anser2 ?lephantiasis 6 Glariasis 6 oedema 6 tissue selling 1

1

(c)(ii) !,le to explain ho Glarial orms cause the disease2 (7hen 0 is ,locked) excess tissues Duid is not

returned to the ,loodstream2 The ,od3 tissues ,ecome sollen2 ,ecause of too much fluid accumulates in the space

,eteen the cells

1

11

"

(d) !,le explain one dierence ,eteen the compositionof interstitial Duid and l3mph2 l3mph contains more 6 higher l3mphoc3tes than

interstitial Duid ,ecause2 l3mph nodes along l3mphatic s3stem producesl3mphoc3tes >0H l3mph contains more fatt3 su,stances ,ecauseH lacteals 6 l3mph capillaries in illus transport fatt3

acid and gl3cerol 6 droplets of lipids 6 fat solu,leitamins to the ,lood stream (!n3

1

1

11

"

(e) !,le to explain importance of l3mphatic

s3stem in human. Sample anser:2 Maintain the fluid ,alance in the ,od32 ,3 returning excess interstitial Duid to the,loodstream >02 Transport fatt3 acids and

l cerol 2 from lacteal to

11

11

"

!O!AL 12

/esto. 5No rtera Mars

(a) !,le to explain the effect of CSA onstructure -. Sample anser :2 (CSA) stimulates the groth 6 deelopment of theprimar3 follicle 2 Structure - ill gro 6 deelop 6,ecomes secondar follicle 6

11

"

(,) !,le to explain the effect if the leel ofhormone 4 is lo. Sample anser :2 >ulation ill not occur

2 IraGaan follicle ill not release the secondar3ooc3te (into the Callopian tu,e).

1

1

"

MARKING SHEME 4551

Muat

turun

(percum

a)sk

emalai

ndi

:

%%%'(s)*oo+)*+-

re.)o'M

uat

turun(p

ercu

m

a)ske

ma

laindi

%%%'(s)

*oo+)*+-re.)o'


9/27

BIOLOG# 4551 MARKING SHEME !RIAL SBP SPM 2012

(c) !,le to explain one dierence ,eteen the primar3ooc3te and the secondar3 ooc3te.Sample anser :2 #ifference : primar3 ooc3te is diploid hile

secondar3 ooc3te is haploid.2 ?xl anation : -rimar ooc te has under o meiosis (@).

1

1

"

(d)(i) !,le to complete the graph that shos the thickness of endometrium all is decreasing 6 thinning.

1 1

(d)(ii) !,le to explain the graphdran. Sample anser :2 %orpus luteum degenerate2 Jo ro esterone is secreted (to thicken the

11

"

(e) !,le to explain the importance of structure /during foetal deelopment.Sample anser :

2 / secrete progesterone2 (progesterone ill thickened and) maintained theendometrium all 2 ?ndometrium all read3 for

im lantation of em,r o 66 reent

1 1

$

!O!AL 12

/esto.

No rtera Mars

(a) !,le to explain the gas uptake for respiration through

pores M and J. Sample anser:

Throu g h M:2 (@n da3 time) stoma 6 M (in the epidermis ofthe leaf) open 2 >x3gen from the atmospherediffuses (through stoma) 2 into intercellular airspaces2 of spong3 mesoph3ll (and palisademesoph3ll) 2 follo the concentrationgradient

(!n3 $)

Throu g h J:2 !t the lenticels (J)2 ox3gen from atmospherediuses 2 into the air spaces

1 1 1 1 1

$

1

MARKING SHEME 4551

Muat

turun

(percum

a)sk

emalai

ndi

:

%%%'(s)*oo+)*+-

re.)o'M

uat

turun(p

ercu

m

a)ske

ma

laindi

%%%'(s)

*oo+)*+-re.)o'


10/27


(,) !,le to explain the respiration in the root cellsof rice plant. Sample anser:2 The plant carr3 out anaero,icrespiration 2 glucose is ,roken

don2 in the a,sence of ox3gen torelease energ3 2 produces ethanol%>" (and energ3)2 cells in the roots of rice plants are extremel3tolerant of ethanol 2 Man3 of the roots are er3shallo2 the roots use the ox3gen hich diffuses into the

1 1 1 1 1 1

(c) !,le to explain the relationship ,eteen the rate ofphotos3nthesis and the rate of respiration at points - /

0 and S.

Sampleanser: !t- :2 @n the dark 6 lo light (intensit3) onl3respiration occurs 2 hence large 8uantit3 of%>" is produced6released2 !s light (intensit3) increases the 8uantit3 of %>"

6 produce decreases2 ,ecause part of %>" produced during respiration

is used for photos3nthesis2 sugar used in respiration more rapidl3 than it is

produced in photos3nthesis

!t /:2 (!t this point of light inensit3) all the %>" release

from respiration is reused 6 e8uialent to %>" usedup during photos3nthesis 66 no net gain or loss in%>" 6 sugar produced

2 rate of photos3nthesis is e8ual to the rate

of respiration 2 this point is calledcompensation point2 net gaseous exchange is Fero

!t 0:2 as light intensit3 increases the rate of photos3nthesis

,ecome faster than 6 exceed the rate of respiration2 the %>" needed is o,tained from the atmosphere2 (at the same time) excess >" is releases (into theatmosphere)

1 1 1

1

1

1

1 1 1

1

11

1

*

!O!AL 20

Muat

turun

(percum

a)sk

emalai

ndi

:

%%%'(s)*oo+)*+-

re.)o'M

uat

turun(p

ercu

m

a)ske

ma

laindi

%%%'(s)

*oo+)*+-re.)o'


11/27

MARKING SHEME 4551


12/27


/esto.

No rtera Mars

(a) !,le to explain the correctie mechanism hen theosmotic pressure of the ,lood increases.

Sample anser:2 7ater content in the ,lood is lo 66 lood ish3pertonic 2 #etected ,3 osmoreceptor2 @n h3pothalamus2 Send nere impulse topituitar3 gland 2 Secretes !#A2 Transported ,3 ,lood to kidne32 #istal conoluted tu,ule 6 collecting ductof nephron 2 More permea,le toardsater

1 1 1 1 1

(,) !,le to explain the inolement of nerous s3stemand endocrine s3stem in the situation.Sample anser:2 The receptors 6 e3es detectstimulus 2 Sent nere impulseto ,rain2 @ntegration and interpretation ofinformation 2 Sent nere impulse toadrenal gland 2 Secretes adrenalin2 Transported ,3 ,lood (to lier lungs

and heart) 2 (@n the lier) gl3cogenconerted into glucose 2 @ncrease,reathing rate2 @ncrease entilation rate 66 gaseous exchangein the lungs 2 @ncrease heart,eats2 More ,lood 6 glucose 6 ox3gen (in skeletalmuscles) 2 More cellular respiration

1 1 1 1

1 1 1 1

*

(c) !,le to explain the effect of a pain killer drug on thetransmission of nere impulses.Sample anser:

2 Jere impulses reach axon terminal 6s3naptic kno, 2 ?nerg3 from mitochondria2 Besicles containing neurotransmitter2 Merged 6 fused ith (preKs3naptic)mem,rane 2 0eleasesneurotransmitters2 @nto s3napse2 #rugs Jeutralised 6 ,locked 6 disintegrate theneurotransmitters 2 Jo 6 less neurotransmitters

1 1 1 1 1

*

!O!AL 20

Muat

turun

(percum

a)sk

emalai

ndi

:

%%%'(s)*oo+)*+-

re.)o'M

uat

turun(p

ercu

m

a)ske

ma

laindi

%%%'(s)

*oo+)*+-re.)o'


13/27

MARKING SHEME 4551


14/27


/esto.

No rtera Mars

(a) !,le to descri,e mechanism ofphotos3nthesis. Sample anser:

2 (0eaction @) : ;ightreaction 2 >ccurs ingranum 6 grana 2 Thatcontains chloroph3ll2 7ater molecules are ,roken don,3 light 2 @nto h3drogen ions andh3drox3l ions 2 %alled photol3sis ofater2 ?lectrons from chloroph3ll2 #ischarged h3drogen ions into h3drogen

atoms 2 A3drox3l ions release electrons(to the chloroph3ll) 2 Corm ox3gen gas andater2 (0eaction @@) : #arkreaction 2 >ccurs in stroma(of chloroplast) 2 %ontainsenF3mes

1 1 1 1 1

1 1 1 1

1+

(,) !,le to discuss the menu hether it proides a,alanced diet for the pregnant oman or not.Sample

ansers:2 Jo2 %ontains too much fat2 @n fried rice 6 chicken rice 6 friednoodle 2 @ncrease cholesterolleel2 %ause excess ,od3 eight 6 h3pertension 6cardioascular pro,lems 2 %ar,onated drink containsexcess sugar2 %ause dia,etics2 %ontains colouring 6 preseraties 6

chemicals 6 acids 2 %ause cancer 6 gastritis2 %oee contains caeine 6 drugs 6chemicals 2 !cting on the neres2 ;ess 6 noegeta,les2 %ausecontipation2 ;ess itamin 6 minerals 6 ferum 66 otherexamples 2 for good health 6 make ,lood66 other examples

(1+marks) >0

1 1 1 1 1 1

1 1 1 1 1 1

1+

Muat

turun

(percum

a)sk

emalai

ndi

:

%%%'(s)*oo+)*+-

re.)o'M

uat

turun(p

ercu

m

a)ske

ma

laindi

%%%'(s)

*oo+)*+-re.)o'


15/27

MARKING SHEME 4551


16/27


2 less fats so less risk of cardioascularpro,lems 2 chicken soup proidesminerals 66 examples 2 for goodhealth 66 other examples

2 anana proidesG,res !oid

1 1 1

!O!AL 20

/esto.

No rtera Mars

(a) (i) !,le to descri,e the use ,acteria inproducing insulin. Sample anser:2 Ienetic engineering

2 (Segment of) #J! 6 gene 6gene code 2 for insulinproduction2 taken from human cell 6pancreas 2 insert into,acteria2 form ,acteria #J! recom,inant2 %ulture 6 mitosis 6 ,inar3 Gssion2 Corms more ,acteria (#J!recom,inant) 2 S3nthesis insulin

1

1 1 1 1 1

'

(a)(ii) !,le to explain ho the microorganisms are useful inmedicinal Geld. Sample anser:2 Penicillium notatum is afungus 2 -roducesanti,iotics2 Lill 6 Gght 6 preent groth of othermicroorganisma 2 Treat disease such asgonorhoea 6 s3philis 6 lungs infection

(!n3") 2 Suspension of dead or eakened called accine2 @n=ected into human 6,lood 2 Stimulatesl3mphoc3tes 2 -roduce

1 1 1 1

1

1

'

(,) !,le to discuss the good and ,ad effects of thehuman actiit3. Sample anser:Iood eect:2 -roduce goods 6 materials 66 an3examples 2 se in dail3 life2 Motor ehicles for transport

(!n3

") ad eects:2 0eleases sulphur dioxide 6nitro en dioxide #issole in

1 1 1

"

1+

MARKING SHEME 4551

Muat

turun

(percum

a)sk

emalai

ndi

:

%%%'(s)*oo+)*+-

re.)o'M

uat

turun(p

ercu

m

a)ske

ma

laindi

%%%'(s)

*oo+)*+-re.)o'


17/27


2 Corms sulphuric acid 6 nitricacid 6 acid 2 #on pour as acidrain2 #issoles minerals in

soil 2 ;ess fertile forplant groth2 0eleases poisonous chemicals 6 aluminium 66other examples 2 7ater in riers 6 lakes loer pA2 psets ecological ,alance2 #eath of planktons 6 Dora 6fauna 2 #estruction of foodchain 6 e, 2 ?xtinction of

1 1 1 1 1 1 1

!O!AL 20

PAPER 3

/esto. 1

1 (a) [L++$ < Measuring sing Jum,erN

Score %riteria$ !,le to record the total area coered ,3 Mucor sp. on each ,read

correctl3:

Sample ansers:

" !,le to measure and record 2 a.s%ers )orre)t+(1 !,le to measure and record 1 a.s%ers )orre)t+(+ Jo response or rong response

1 (,) (i) [L++1 < >,serationN

Score %riteria$ !,le to state t%o o,serations correctl3 according

to " criteria: 2 read 66 Jum,er of &+ attDorescence ,ul,2 The total area coered ,3 Mucor sp.

66 Jum,er of small s8uares hich are coered half or more ,3Mucor sp.

Sa'6+e a.s%ers71. >n ,read 0 the total area coered ,3 Mucor sp. is &96'+ cm

"6

the largest.". To &+ att Dorescence ,ul,s the num,er of small s8uares

read The total area coered ,3 Mucor sp. 0 &9 6 '+

S $1 T "&

Muat

turun

(percum

a)sk

emalai

ndi

:

%%%'(s)*oo+)*+-

re.)o'M

uat

turun(p

ercu

m

a)ske

ma

laindi

%%%'(s)

*oo+)*+-re.)o'


18/27

MARKING SHEME 4551


19/27


" !,le to state a.( o.e o,seration correctl3 or !,le to state a.( t%o .)o'6+ete o,serations (an3 " criteria)

Sa'6+e a.s%ers71. The total area coered ,3 Mucor sp. on ,read 0 and ,read Sare dierent.". The num,er of small s8uares hich are coered half or

more , Mucor s . de ends on the num,er of &+ att1 !,le to state a.( o.e -ea of o,seration.(an3 1 criteria)

Sa'6+e a.s%ers71. The total area coered ,3 Mucor sp. are different.". The num,er of small s8uares hich are coered half or

more ,3 Mucor sp. depends on the num,er of ,ul,s.

+ Jot a,le to response or rong response.

1 (,) (ii) [L++& < Making @nferencesN

Score %riteria$ A8+e to 'ae one logical inference 9or ea)* o8ser:ato.

8ase- o. t*e )rtera7 2 ;ight intensit3 66 #egree of ,rightness2 0ate 6 degree of groth 66 Caoura,le condition for groth

Sa'6+e a.s%ers7

1. The higher the light intensit3 the loer the rate of groth ofMucor sp. 6 ,read mould 6 fungus 6 microorganism.

". The less lighted the area the more suita,le for thegroth of Mucor sp. $. The groth of Mucor sp. is the 8estin a dark lace.

" A8+e to 'ae one logical inference 9or a.( o.eo8ser:ato.. or

!,le to make o.e +og)a+ and .)o'6+ete .9ere.)e ,ase onone criterion for each o,seration.

Sa'6+e a.s%ers 9or .)o'6+ete .9ere.)es71. ;ight intensit3 aects the groth ofMucor sp. ". The Mucor sp. gros in adarker lace.

1 !,le to make an -ea of inference ith one criterion.

Sa'6+e a.s%ers71. The groth of fungus is dierent on the ,read.". The groth of fungus depends on the num,er of ,ul,s.


MARKING SHEME 4551

Muat

turun

(percum

a)sk

emalai

ndi

:

%%%'(s)*oo+)*+-

re.)o'M

uat

turun(p

ercu

m

a)ske

ma

laindi

%%%'(s)

*oo+)*+-re.)o'


20/27


1 (c) [L+1++1 < %ontrolling Baria,lesN

Sa'6+e ansers:Baria,les Method to handle the aria,les

Manipulat e dari a , l e: ;ightintensit366 Jum,er of &+ att

sing different num,er of &+ attDorescence ,ul,s66 se one to and three &+ att

0esponding aria,le: The total area coered ,3Mucor sp. 66 The num,er ofsmall s8uares hichare coered half or more ,3Mucor sp. 66 0ate 6 degree of

roth

%ount and record the num,er ofsmall s8uares hich are coered half ormore ,3 Mucor sp.66 %alculate ,3 using

formula: 0ate ofroth

%ontrol l ed a ri a ,le: T3pe of ,read 66 Bolume ofater 66 T3pe of ater

3 using %*te ,read66 7atered ,3 10 '+ of(distilled) ater 66 se -st++e-

Score %riteria$ !,le to state a++ ;


21/27

MARKING SHEME 4551


22/27


Sa'6+e a.s%ers71. ;ight affects the groth ofMucor sp. ". The Mucor sp.gros in a darker place.


1 (e) (i) [L++ < %ommunicatingN

Score %riteria$ !,le to construct a ta,le and record all the data ith all

columns 6 ros la,elled ith correct units.

Sample ansers:

" !,le to dra a ta,le ith columns 6 ros la,elled andcorrect units ,ut incomplete data.

1 !,le to dra a ta,le ith columns 6 ros la,elled and correct+ Jot a,le to response or rong response.

1 (e) (ii) [L++ < Space and Time 0elationshipN

Score %riteria$ !,le to dra a graph of the groth rate of Mucor sp. against light

intensit3 ith 3 criteria correctl3.2 oth axes ith regularalues 2 !ll points arecorrectl3 plotted

" !,le to dra a graph of the groth rate of Mucor sp. against

light intensit3 ith a.( 2 criteria correctl3.1 !,le to dra a graph of the groth rate of Mucor sp. againstlight intensit3 ith a.( 1 criteria correctl3.


1 (f) [L++* < @nterpreting #ataN

Score %riteria$ !,le to explain the relationship ,eteen the groth rate of

Mucor sp. and light intensit3 clearl3 and accuratel3 ,ased on 3

criteria:2 ;ight intensit32 The groth rate of Mucor sp.

MARKING SHEME 4551

;ight

intensit3

The total area

coered ,3 Mucor s . cm"

The groth rate of

Mucor sp. (cm"

da3K1

)&+ &9 6 '+ $.' 6 $.' 6 $.'1*+ $1 "." 6 "."1 6 "."1&1"+ "& 1. 6 1.1 6 1.1&

Muat

turun

(percum

a)sk

emalai

ndi

:

%%%'(s)*oo+)*+-

re.)o'M

uat

turun(p

ercu

m

a)ske

ma

laindi

%%%'(s)

*oo+)*+-re.)o'


23/27


Sa'6+e a.s%er71. The higher the light intensit3 the loer the rate of groth of

Mucor sp. This is ,ecause the condition is faoura,le forgroth.

(0e=ect: num,er of" !,le to explain the relationship ,eteen the groth rate of

Mucor sp. and light intensit3 clearl3 and accuratel3 ,ased on a.(1 !,le to explain the relationship ,eteen the groth rate of

Mucor sp. and light intensit3 clearl3 and accuratel3 ,ased on a.(+ Jo graph dran in @ (e) (ii). >0 Jot a,le to response or rong

1 (g) [L++9 < #eGne >perationall3N

Score %riteria

$ !,le to state the meaning of groth operationall3 ,ased on 3 criteria:2 The total area coered ,3 Mucor sp. 6 ,read mould 6 fungus 6

microorganism on (hite) ,read2 #etermined ,3 using a 8uadrat (samplingtechni8ue) 2 !ffected ,3 light intensit3

Sa'6+e a.s%er71. (Iroth is) the total area coered ,3 Mucor sp. 6 ,read

mould 6 fungus 6 microorganism and is determined ,3 usinga uadrat (sam lin techni ue) hich is affected , li ht

" !,le to state the meaning of groth operationall3 ,ased on a.( 21 !,le to state the meaning of groth operationall3 ,ased on a.( 1+ Jot a,le to response or rong response.

1 (h) [L++' < -redictingN

Score %riteria$ !,le to predict the total area coered ,3 Mucor sp. on the

hite ,read 5 accuratel3 ,ased on 2 criteria:

1. ?xpected total area66 %omparing ith recentcondition ". 0eason

Sa'6+e a.s%er71. (The total area coered ,3 Mucor sp. on the hite ,read 5

is) less than &9 6 '+ cm"

66 an3 alue less than &9 cm"

66 lessthan the area on ,read 0 ,ecause less ater 6 moisture 6humidit3 66 less 6 not suita,le for groth of Mucor sp. 6fungus 6 mould.

" !,le to predict the total area coered ,3 Mucor sp. on the

hite ,read 5 accuratel3 ,ased on criteria 1.1 !,le to predict the total area coered ,3 Mucor sp. on the hite

,read 5 ,ased on criteria 1 inaccuratel3.

MARKING SHEME 4551

Muat

turun

(percum

a)sk

emalai

ndi

:

%%%'(s)*oo+)*+-

re.)o'M

uat

turun(p

ercu

m

a)ske

ma

laindi

%%%'(s)

*oo+)*+-re.)o'


24/27


Sa'6+e a.s%er71. ;ess than &9 6 '+ small s8uares 66 an3 alue less than &9 6

'+ 66 less than the other ,reads.+ Jot a,le to response or rong response.

1 (i) [L++" < %lassif3ingN

Score %riteria$ !,le to classif3 don a++ six factors accuratel3.

Sa'6+e a.s%ers7

" !,le to classif3 don a.( 4=5 factors accuratel3.1 !,le to classif3 don a.( 2=3 factors accuratel3.+ Jot a,le to response or rong response.

/esto. 2

Pro8+e' State'e.t

S)or rtera

$ !,le to state the pro,lem statement of the experiment)orre)t+( that include criteria:2 Manipulatedaria,le2 0espondingaria,le2 0elation in 8uestion form and 8uestion s3m,ol [ON

Sa'6+e a.s%ers71. 7hat is the effect of temperature on the rate ofenF3me actiit3O ". #oes temperature aect theactiit3 of pepsinO$. #oes temperature aect the time taken for al,umensus ension to turn clearO &. Ao tem erature aectin the time

" !,le to state the pro,lem statement of the experiment ith a.( 2 criteria.

Sa'6+e a.s%ers7

1. 7hat is the effect of temperature on the rate of

MARKING SHEME 4551

iotic factor !,iotic factor

-arasites#ecompos

er

;ight

intensit3Aumidit3

Temperatur

Muat

turun

(percum

a)sk

emalai

ndi

:

%%%'(s)*oo+)*+-

re.)o'M

uat

turun(p

ercu

m

a)ske

ma

laindi

%%%'(s)

*oo+)*+-re.)o'


25/27


1 !,le to state the of pro,lem statement ith a.( 1 criterion.

Sa'6+e a.s%ers71. #oes temperature aect theenF3meO ". 7hat is the rate ofreactionO


>ara8+es

S)or rtera

$ !,le to state the 3 aria,les correctl3.

Sa'6+e a.s%ers7Manipulated aria,le: Temperature0esponding aria,le: The rate of enF3me 6 pepsin actiit3

66 The time taken for al,umen suspensionto turn clear 66 The time taken for complete

h3drol3sis of al,umen 6su,strate 6 protein 6 starchO

%ontrolled aria,le: %oncentration 6 olume of al,umen(sus ension) 6 e sin (solution) 66 A

" !,le to state a.( 2 aria,les correctl3.1 !,le to state a.( 1 aria,le correctl3.+ Jot a,le to response or rong response.

H(6ot*ess

S)or rtera

$ !,le to state the h3pothesis )orre)t+( ,asedon 3 criteria: 2 Manipulated aria,le2 0esponding aria,le2 0elationship of thearia,le

Sa'6+e a.s%ers71. The rate of pepsin actiit3 is *g*est at $P%.". The higher the temperature the longer 6 shorter the time

taken for the complete h3drol3sis of al,umen 6 starch. (0e=ect:su,strate)

$. !t $P% the time taken for al,umen sus ension to turn clear" !,le to state the h3pothesis ith a.( 2 criteria

Sa'6+e a.s%ers71. The rate of pepsin actiit3 depends ontemperature. ". The pepsin actiit3 changesat different temperature.$. The enF me actiit de ends on 6 affected , the

MARKING SHEME 4551

Muat

turun

(percum

a)sk

emalai

ndi

:

%%%'(s)*oo+)*+-

re.)o'M

uat

turun(p

ercu

m

a)ske

ma

laindi

%%%'(s)

*oo+)*+-re.)o'


26/27


1 !,le to state the -ea of the h3pothesis.

Sa'6+e a.s%ers71. The enF3me actiit3 dependson heat. ". The enF3me actiit3changes.


Matera+s a.- A66arats

S)or rtera

$ !,le to state a++ functional materials 6 "Qmaterials R"Qapparatus R 1 other material R " other apparatus for theexperiment.Materials: Q! l,umen ( s uspension) Qpepsin (solution) distilled

ater and ice cu,es.

!pparatus: Q7a ter , a th >0 unsen ,ur n er ,ea k er a ndth e rmometer QS topatch test tu,e andmeasurin c linder.

" !,le to state a++ functional materials 6 "Qmaterials R"Qapparatus R 1 other apparatus for the experiment.

1 !,le to state a++ functional materials 6 "Qmaterials R"Qapparatus for the experiment.


Pro)e-re

S)or rtera

$ !,le to state 5Ps, procedures -1 -" -$ -& and-' correctl3. -1 : Ao to Set p The !pparatus(&-1)-" : Ao to Make %onstant The %ontroledBaria,le (1-") -$ : Ao to Manipulate TheManipulated Baria,le (1-$) -&: Ao to 0ecord

" !,le to state 3=4Ps of an3 procedures -1 -" -$ -& and -'1 !,le to state 2Ps of an3 procedures -1 -" -$ -& and -'+ Jot a,le to response or rong response.

MARKING SHEME 4551

Muat

turun

(percum

a)sk

emalai

ndi

:

%%%'(s)*oo+)*+-

re.)o'M

uat

turun(p

ercu

m

a)ske

ma

laindi

%%%'(s)

*oo+)*+-re.)o'


27/27


E?a'6+e o9 Pro)e-re71. ; a , el three test tu,es ! and %. -1". C ill each test tu,e ith ' ml of al,umen

suspension. -1 -"-1-"

$. !dd ' ml pepsin into eer3test tu,e. -1 -" -1-"&. 0ecord the init i al o,seration on the al,umen suspension. -1'. @mm e rse the test tu,es ! in ater ,ath of $+P % in &+P%

and % in +P % . -1 -$-1-$

. Start the stopatch. -1. 0e c o r d the time taken for the al,umen suspension turns clear. -&*. %alcul a te the r a te of enF3me actiit3 using the

folloing formula 0ate of enF3me-&

9. T a ,ulate the data (in a ta,le). -&1+. 0epeat the experiment 6 steps 1K9 to get aerage readings. -'

!ccept if use other su,strates and enF3mes.?xample: Materials Qstar c h Qa m 3 lase solution and

iodine solution. !pparatus hite tiles

Data

S)or rtera

" !,le to construct a ta,le of data ,asedon 2 criteria: 2 %orrect title and units2 Manipulated aria,le

Sa'6+e a.s%ers7

1 !,le to ta,ulate the data ith an3 1 criterion.+ Jot a,le to response or rong response.

END O@ MARKING SHEME

Temperature (P%)

The time taken for theal,umen suspensionturns clear (min)

0ate of(enF3me)actiit3

K$+&++

Muat

turun

(percum

a)sk

emalai

ndi

:

%%%'(s)*oo+)*+-

re.)o'M

uat

turun(p

ercu

m

a)ske

ma

laindi

%%%'(s)

*oo+)*

[myschoolchildren] skema biologi percubaan spm 2012 sbp q.rtf

Documents