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Sains Tingkatan 5 Bab 1
4. Kesemua piring Petri disimpan dalam keadaan telangkup pada suhu bilik.
All the Petri dishes were kept inverted at room temperature. 1
BAB
5. Pemerhatian direkodkan selepas dua hari.
Observations were recorded after two days.
Pemerhatian
Observation Kehadiran
Piring Petri Presence of Bilangan koloni bakteria
K3 Petri dish Nutrien Air Number of bacterial colonies
PI Nutrient Water
1
2 A Tidak hadir / Absent Hadir / Present Sedikit/ A few EKSPERIMEN WAJIB
3 Banyak / Many
S B Hadir / Present Hadir / Present
C Hadir / Present Tidak hadir / Absent Tiada / None
K3P1 K3P2 K3P3
Perbincangan 1. Bagaimanakah kadar pertumbuhan dikira pada akhir eksperimen?
Discussion How is the growth rate of bacteria measured at the end of experiment?
K4 Mengira jumlah koloni bintik putih yang kelihatan.
PI Calculate the total colonies of white spots appeared.
1
2 2. Berdasarkan pemerhatian, berikan satu inferens tentang pertumbuhan bakteria. TP 2
3 Based on the observation, state an inference about the growth of bacteria.
S
Kadar pertumbuhan bakteria meningkat dalam kehadiran nutrien dan
air .
The growth rate of bacteria increases in the presence of nutrients and water . K4P1
3. Mengapakah piring-piring Petri perlu diletakkan terbalik? Menganalisis
Why must the Petri dishes be placed invertedly?
Untuk mengelakkan air terkondensasi daripada menitis ke atas permukaan agar.
To prevent condensed water from dripping onto the surface of agar.
4. Apa yang menyebabkan mikroorganisma menjadi tidak aktif dan mati apabila berada dalam
persekitaran yang kering?
What causes microorganisms to become inactive and die when they are in a dry condition?
Mikroorganisma tidak dapat menjalankan proses metabolisme sel disebabkan ketiadaan
air.
Microorganisms are unable to carry out cell metabolism process due to the absence of water.
5. Bagaimanakah mikroorganisma seperti kulat dan alga mampu membiak dalam keadaan
yang terlampau kering? TP 2
How microorganisms such as fungi and algae can grow in a condition that is too dry?
Kedua-dua kulat dan alga boleh membiak secara aseks melalui pembentukan spora .
Both fungi and algae can reproduce asexually by the formation of spores .
6. Mikroorganisma yang memperoleh nutrien dari sel perumahnya disebut parasit .
The microorganism that obtains nutrients from its host cell is called parasite .
Kesimpulan 1. Hipotesis diterima ./ Hypothesis is accepted . K4P2
Conclusion
2. Mikroorganisma tumbuh dengan lebih pantas dalam keadaan lembap
dan dalam kehadiran nutrien .
Microorganisms grow faster in humid condition and in the presence of
nutrients . K4P3
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