The Essentials of Respiration
Science
Year 9
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A worksheet covering Respiration for Year 9 students.
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The Essentials of Respiration
Subject: ScienceGrade: Year 9
Name:
Date:
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Untitled Worksheet
Grade Year 9
A
Introduction
Respiration is a vital biochemical process where cells convert glucose and oxygen into energy, carbon dioxide, and water. This process occurs in the mitochondria and is essential for maintaining life by providing energy for cellular activities.
B
Questions
Answer all questions. Show your working where appropriate.
1.
Which of the following is the main site of aerobic respiration in the cell?
[1 mark]AMitochondria
BChloroplast
CNucleus
DRibosome
2.
True or False: Respiration only occurs in animals.
[1 mark]3.
True or False: The products of aerobic respiration are carbon dioxide, water, and energy.
[1 mark]4.
What is the primary purpose of respiration?
[2 marks]5.
Explain the difference between aerobic and anaerobic respiration.
[3 marks]6.
Describe the role of glucose in respiration.
[2 marks]7.
Calculate the total energy yield from aerobic respiration using the formula: C6H12O6 + 6O2 → 6CO2 + 6H2O + Energy (38 ATP).
[2 marks]8.
Match the following terms to their definitions:
[3 marks]1. Glycolysis
2. Krebs Cycle
3. Electron Transport Chain
AThe final stage that produces the most ATP.
BThe first stage in respiration where glucose is split.
CA series of reactions that produce electron carriers.
9.
Order the stages of aerobic respiration:
[2 marks]1
2
3
4
5
10.
Fill in the blank: The energy currency of the cell is ___.
[1 mark]11.
Discuss the importance of respiration in living organisms. Explain how this process supports life.
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- Created
- 12/30/2025
- Updated
- 12/30/2025
- Type
- worksheet