Year 11 - Science
Explaining the effect of different substrates on the rate of cellular respiration
Aerobic and anaerobic cellular respiration
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This pupil-friendly study guide includes a unit summary, clear notes, common mistakes, and quick questions with answers.
Unit Summary
This unit covers cellular respiration as an exothermic reaction in all cells, comparing aerobic and anaerobic processes. It explores cell structures and functions, enhanced by electron microscopy. Emphasis is on conducting experiments, analysing data, and interpreting results.
Lesson Summary
You will learn to analyse data collected from a measuring cylinder, calculate the rate of cellular respiration, and explain the effect of different substrates on the rate.
Key Notes
- Process data to calculate the volume of gas collected in the measuring cylinder, and the mean of repeat measurements.
- Calculate the rate of respiration by dividing the volume of gas collected in the measuring cylinder by the time.
- Use appropriate units for the rate of cellular respiration.
- Compare the rate of respiration in yeast given different substrates, and describe trends in the data.
- Use ideas about enzymes and active sites to explain the effect of different substrates on the rate of respiration.
Vocabulary To Learn
- rate: A measure of how much change occurs per unit of time.
- cellular respiration: An exothermic chemical process that transfers energy for life processes, using glucose as fuel.
- substrate: The substance that fits into an enzyme's active site.
- enzyme: A biological catalyst.
- active site: The part of an enzyme where the substrate binds.
Common Mistakes To Avoid
- Thinking that each enzyme can act on many different substrates.
3 Quick Questions (With Answers)
1. Explain the scientific idea in this lesson using two key points.
Process data to calculate the volume of gas collected in the measuring cylinder, and the mean of repeat measurements. Calculate the rate of respiration by dividing the volume of gas collected in the measuring cylinder by the time.
2. Define this scientific word and use it in context. 'rate'
A measure of how much change occurs per unit of time. Include the word in a full scientific explanation, not as a single label.
3. Correct this common scientific misunderstanding.
Mistake: Thinking that each enzyme can act on many different substrates. Correction: This lesson reinforces understanding that each enzyme has a specific substrate, because only that substrate will fit into they enzyme's active site.
More Lessons In This Unit
- Aerobic cellular respiration in humans and other organisms Study Guide
- Aerobic cellular respiration in humans and other organisms, including ATP Study Guide
- Anaerobic cellular respiration in humans and other organisms Study Guide
- Anaerobic cellular respiration in humans and other organisms, including ATP Study Guide
- Explaining the effect of temperature on the rate of cellular respiration Study Guide
- The effect of different substrates on cellular respiration in yeast: practical Study Guide
- The effect of temperature on cellular respiration in small organisms: practical Study Guide
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