Explaining the effect of different substrates on the rate of cellular respiration
I can analyse data collected from a measuring cylinder, calculate the rate of cellular respiration, and explain the effect of different substrates on the rate.
Explaining the effect of different substrates on the rate of cellular respiration
I can analyse data collected from a measuring cylinder, calculate the rate of cellular respiration, and explain the effect of different substrates on the rate.
These resources will be removed by end of Summer Term 2025.
Lesson details
Key learning 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.
- 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.
Keywords
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 misconception
Thinking that each enzyme can act on many different substrates.
This lesson reinforces understanding that each enzyme has a specific substrate, because only that substrate will fit into they enzyme's active site.
Licence
This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).
Lesson video
Starter quiz
6 Questions
glucose + oxygen --> water + carbon dioxide
glucose --> lactic acid
glucose --> carbon dioxide + ethanol
Exit quiz
6 Questions
the part of an enzyme’s structure where the substrate binds
biological catalyst
a model used to explain why each enzyme can only catalyse one reaction
a substance that binds to the active site of an enzyme
a measure of change over time