1. The diagram shows human erythrocytes after being immersed in distilled water and a 20% sodium chloride solution. The erythrocytes swell and burst in distilled water but remain intact in the sodium chloride solution. 2. A potato strip transferred from a 30% sucrose solution into distilled water would shrink and wrinkle as water from inside the potato strip's cells moves into the distilled water by osmosis due to lower sugar concentration outside the cells. 3. The questions ask about organelles in animal cells and plant cells, membrane structure and function, and factors affecting molecule movement through the plasma membrane.

1. SECTION C
Essay question.
( 10 MARKS)
1. Diagram 3.2 showshumanerythrocytesafterbeingimmersedindistilledwaterand
20% sodiumchloride solution.
Rajah 3.2 menunjukkaneritrositmanusia selepasdirendamdidalamair suling dan
larutan natriumklorida 20%.
(a) Explainwhathadhappenedtothe erythrocytes.
Terangkan apa yang telah terjadikepada eritrosittersebut ( 6 marks)
( b) Explainthe situationoccurwhenapotato stripistransferredfrom30% sucrose
solutionintodistilledwater.
Terangkan situasiyang berlaku apabila jalurkentang dipindahkan darilarutan
sukrosa 30% ke dalamair suling ( 4 marks)

2. SECTION B
20 marks
Answerall questions
Soalan struktur
1. Diagram1.1 showsorganellesQand R
Rajah1.1 menunjukkanorganelQdan organelR
Diagram 1.1 /Rajah 1.1
a) NameQ and R
Namakan Qdan R.
Q .............................................:
R:............................................... ( 1 marks)
b) (I )Statethefunction of organellesQ and R
Nyatakan fungsiorganelQdan R
Q................................................
R................................................ ( 2 marks)
( ii) State 2 differencesof physiologicalprocessbetween organelleQand R.
Nyatakan dua perbezaan prosessfisiologiantara organelQdan R.

3. ..................................................................................................................................................................
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( 2 marks)
c) (i) Name one type of animal cell whichthe organelle Qfoundabundantly
Namakan satujenisselhaiwan yang mempunyaibanyakorganelQ.
................................................................................................................................................................
( 1 mark)
( ii) Explainthe effecttothe cell mention inc (i),if organelle Q isabsent.
Terangkan kesan kepada selyang disebutdalamc(i),jika organelQtidak wujud.
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( 3 marks)
d) Diagram 1.2 is a leaf cross sectionshowscell Pwhichcontainsalarge numberof organelle R.
Rajah 1.2 adalah 3keratan rentasdaun menunjukkan selPyang mengandungiorganelR
dalamjumlah yang banyak.
Diagram 1.2/ Rajah 1.2
Name the cell P
Namakan selP
.....................................................................................................................................................
( 1 marks)

4. 2. Diagram 2 showsa plasmamembrane.
Rajah 2 menunjukkan modelmembraneplasma.
Diagram 2/Rajah 2
(a) Label the structures
Labelkan struktur
J: .........................................................
K:.........................................................
L:.........................................................
M:........................................................ (4marks)
(b) Name a model of a plasmamembrane inthe diagram2.
Namakan modelmembraneplasma dalamrajah 2.
....................................................................................................................................( 1 mark)
(c) State one characteristicof the plasmamembrane inthe diagram 2
Nyatakan satucirimembraneplasma dalamrajah 2.
.....................................................................................................................................................
. ( 1 mark)
(d) Give twoexamplesof membrane andexplainwhythe substancescannotacrossthe
structure X.
Berikan 2 contoh dan terangkan kenapabahan tersebuttidakdapatmerentasistrukturX.
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.....................................................................................................................................................
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.
(e) Name 2 factorsthat affectedthe movementof moleculesthrough the plasma
membrane
Namakan 2faktoryang mempengaruhipergerakan molekulmenerusimembrane
plasma
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( 2 marks)