Page 50 - PWR UP TG1 SAINS

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Sains Tingkatan 1 Bab 2

1. Ahmad telah membawa satu sampel air ke makmal sekolah untuk mengenal
pasti satu jenis organisma dalam sampel air itu. Apabila diperhatikan melalui PANDUAN MENJAWAB
mikroskop, didapati sel organisma ini tidak berbentuk empat segi tetapi
mempunyai dinding sel. Nukleusnya berada di sudut tepi dan mempunyai 1. • Sel tumbuhan tidak
kantung cecair yang besar. semestinya berbentuk
Anda diminta untuk membantu Ahmad menentukan jenis sel ini dan empat segi.
Plant cells do not necessarily
wajarkan jawapan anda. KBAT Menganalisis have square shape.
Ahmad has brought a water sample to the school laboratory to identify a type of organism in the • Dinding sel dan vakuol
water sample. When observed through the microscope, the cell of this organism is not rectangular yang besar hanya
but has a cell wall. The nucleus is in the corner and has a large liquid pocket. terdapat dalam sel
You are asked to help Ahmad determine the type of cell and justify your answer. tumbuhan.
Cell wall and large vacuoles
Sel tumbuhan. Sel tumbuhan mempunyai dinding sel dan vakuol (kantung are found only in plant cells.

cecair) yang besar.

Plant cell. A plant cell has a cell wall and a large vacuole (liquid pocket).

2. Rajah di bawah menunjukkan dua keadaan dengan keamatan cahaya yang 2. • Fotosintesis berlaku
berbeza. Dalam keadaan A, tiada gas oksigen atau gas karbon dioksida dengan kehadiran
dilepaskan ke atmosfera. Dalam keadaan B, terdapat pengambilan gas cahaya. Respirasi berlaku
karbon dioksida dari atmosfera dan pelepasan gas oksigen ke atmosfera. tanpa mengira keadaan.
Photosynthesis occurs in the
The diagram below shows two conditions with different light intensity. In condition A, no oxygen presence of light. Respiration
gas or carbon dioxide gas is released into the atmosphere. In condition B, there is an intake of takes place regardless of
carbon dioxide gas from the atmosphere and release of oxygen gas into the atmosphere. conditions.
KBAT Menilai & Menganalisis • Semakin meningkat
keamatan cahaya,
Oksigen Karbon dioksida semakin meningkat
Carbon dioxide
Oxygen kadar fotosintesis.
Fotosintesis Fotosintesis Semakin meningkat hasil
Photosynthesis Photosynthesis fotosintesis.
Oksigen Karbon dioksida Oksigen Karbon dioksida If the intensity of light
Oxygen Carbon dioxide Oxygen Carbon dioxide increases, the rate of
Respirasi Respirasi photosynthesis increases.
Respiration Respiration More photosynthetic
products are produced.
Keadaan A Keadaan B
Condition A Condition B
Berdasarkan pendapat anda, keadaan yang manakah berlaku pada waktu
tengah hari? Wajarkan jawapan anda.
Based on your opinion, which condition occurs during the afternoon? Justify your answer.

Keadaan B. Apabila keamatan cahaya tinggi, kadar fotosintesis tinggi. Lebih
banyak oksigen terhasil dan dibebaskan. Lebih banyak karbon dioksida

diambil dari atmosfera.

Condition B. When light intensity is high, the rate of photosynthesis is high. More oxygen is
produced and released. More carbon dioxide is taken from the atmosphere.

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