Page 67 - Hybrid PBD 2022 Tg 5 - Biology

Biologi Tingkatan 5 Bab 2

Perbezaan / Differences

Fotosintesis / Photosynthesis Respirasi sel / Cell respiration
1. Berlaku di dalam sel yang mempunyai klorofil 1. Berlaku dalam semua sel hidup
seperti sel tumbuhan Occur in all living cells
Occurs in the cells that have chlorophyll such as the
plant cell

2. Tapak bagi fotosintesis ialah kloroplas 2. Tapak bagi respirasi ialah mitokondria
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Site of photosynthesis is in the chloroplast Site of respiration is in the mitochondria

3. Melibatkan anabolisme iaitu sintesis 3. Melibatkan katabolisme iaitu penguraian
glukosa dengan menggunakan karbon glukosa untuk menghasilkan tenaga
dioksida dan air Involves catabolisme which is the breakdown of
Involves anabolism which is the synthesis of glucose to produce energy
glucose from carbon dioxide and water

4. Memerlukan gas karbon dioksida dan air 4. Memerlukan glukosa dan oksigen
Requires carbon dioxide and water Requires glucose and oxygen

5. Menghasilkan glukosa , gas oksigen 5. Menghasilkan tenaga , gas karbon
dan air dioksida dan air
Produce glucose , oxygen and water Produce energy , carbon dioxide and water

6. Menukarkan tenaga cahaya kepada tenaga 6. Menukarkan tenaga kimia kepada tenaga
kimia haba
Converted light energy to chemical energy Converted chemical energy to heat energy

(c) Daripada graf di atas, huraikan mengenai kesan keamatan cahaya terhadap pencapaian titik pampasan
pada tumbuhan P. SP 2.5.3 TP4 KBAT Menganalisis

From the above graph, describe the effect of light intensity on the attainment of compensation point for plant P.
– Pada keamatan cahaya yang rendah, kadar respirasi melebihi kadar fotosintesis bagi tumbuhan P.

When light intensity is low, the rate of respiration exceeds the rate of photosynthesis in plant P.
– Glukosa lebih banyak digunakan dalam respirasi berbanding glukosa yang dihasilkan dalam fotosintesis.
More glucose are being used during respiration compared to the gucose produced in the photosynthesis.

– Apabila keamatan cahaya bertambah, kadar fotosintesis turut bertambah sehingga mencapai titik
pampasan.
When the light intensity increases, the rate of photosynthesis also increases until it reaches the compensation point.
– Pada titik pampasan (X), iaitu pada aras keamatan cahaya 10 lux, kadar fotosintesis adalah sama

dengan kadar respirasi.
At compensation point (X), which is at light intensity level of 10 lux, the rate of photosynthesis is equal to the rate of respiration.

– Semua glukosa yang dihasilkan dalam fotosintesis digunakan dalam respirasi tumbuhan P.
All glucose produced in photosynthesis is used in respiration of plant P.

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02 HYBRID PBD BIOLOGY TG5.indd 42 18/11/2021 11:05 AM