Page 8 - Module & More Biology F4

Biologi Tingkatan 4 Bab 9 Nutrisi dan Sistem Pencernaan Manusia
Structured question format/type remains unchanged based on the new instrument sample; It
Bahagian A
only varies in the number of questions.
1. Rajah 1 menunjukkan sistem pencernaan manusia.
Diagram 1 shows a human digestive system.
2018
2017
(a) (i) Namakan kelenjar V.
Name gland V.
V
Kelenjar air liur / Salivary gland
[1 markah / mark]
(ii) Roti mengandungi kanji. Terangkan peranan kelenjar V
dalam pencernaan roti di dalam mulut.
Bread contains starch. Explain the role of gland V in the digestion of
bread in the mouth. Y
Kelenjar air liur merembes air liur yang mengandungi W

amilase air liur. Batu hempedu di
duktus hempedu
Gallstones block
Salivary gland secretes saliva which contains salivary amylase. the bile duct Z
Amilase air liur menghidrolisis kanji dalam roti kepada

maltose. / Amylase hydrolyses starch in the bread into maltose.
Rajah 1/ Diagram 1
Dalam keadaan neutral

Saliva provides a neutral condition.
[3 markah / marks]
(b) (i) Namakan organ W.
9 Name organ W.
Pundi hempedu / Gall bladder
[1 markah / mark]
BAB (ii) Ali mempunyai batu hempedu di duktus hempedu. Terangkan kesan ini ke atas pencernaan lipid dalam Z.
Ali has gallstones which block the ball duct. Explain this effect to the digestion of lipid in Z.

Batu hempedu menghalang duktus hempedu, hempedu tidak dapat disalur masuk ke dalam Z

Gallstones block the bile duct, bile cannot enter Z, duodenum
Lipid tidak dapat diemulsikan ke titisan kecil / Lipid does not emulsify into tiny droplets
Kurang penguraian lipid ke gliserol dan asid lemak

Lipid is not broken down by lipase into glycerol and fatty acids
[2 markah / marks]
(c) Terangkan perbezaan dalam pencernaan protein di Y dan Z.
Explain the difference in the digestion of protein that occurs in Y and Z.
Di Y, terdapat pepsin manakala di Z, terdapat tripsin. / Y contains pepsin, but Z contains trypsin.

Di Y, protein diuraikan kepada polipeptida manakala di Z, polipeptida diuraikan kepada dipeptide.
In Y, protein in broken down into polypeptide but in Z polypeptide is broken down into dipeptide.

pH di Y adalah berasid manakala pH di Z adalah beralkali. / pH in Y is acidic, but pH in Z is alkaline.
[2 markah / marks]

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