Page 21 - Focus PT3 2020 Science ( BI Version )

Science PT3 Chapter 2 Cell as the Basic Unit of Life

PT3 Practice 2

SECTION A

Form
Form
1 1. The following statement describes the A Glucose + Oxygen → Carbon dioxide + Water
+ Energy
characteristics of cell P.
B Water + Carbon dioxide → Glucose + Oxygen
• No cell wall + Energy
• No nucleus C Oxygen + Water → Carbon dioxide + Glucose
+ Energy
D Energy + Oxygen → Glucose + Carbon dioxide
Which of the following is cell P?
A Nerve cell 3. Which of the following is the importance of
B Palisade cell photosynthesis and cellular respiration process?
C Red blood cell A To preserve the balance of oxygen and carbon
D Onion epidermis cell dioxide content in the atmosphere.
B To preserve the balance of nitrogen in the
2. Cellular respiration is the energy generating atmosphere.
process. Which of the following is the correct C To maintain the cleanliness of the environment.
word equation for the cellular respiration process? D To avoid the increase in global temperature.

SECTION B

1. (a) Diagram below shows two types of cells. Name the cells.

(i) (ii)

[2 marks]
(b) Underline the correct statements regarding the photosynthesis.
(i) Carbon dioxide and water are (used / produced) in the process of photosynthesis.
(ii) Light energy is (absorbed / released) to synthesise food molecules.
[2 marks]
SECTION C

1. Teacher Ali showed a video about the process of photosynthesis and its importance to the students in class
1 Arif. The following statement is one of the quotes in the video:

Photosynthesis is the food-making process by green plants from water and carbon dioxide with the
presence of light and chlorophyll.

(a) State the word equation for the process of photosynthesis. [3 marks]
(b) Carbon dioxide is a substance that is required in the process of photosynthesis.
From where do plants get this supply of carbon dioxide? [1 mark]
(c) State two importance of the process of photosynthesis. [2 marks]
(d) State how deforestation interrupts the process of photosynthesis. [2 marks]

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