Describe how an increase in temperature affects the rate of respiration in plant tissues and explain the biochemical reason behind this change.
Answer
Higher temperature increases enzyme activity, raising the rate of respiration.
The correct answer is Higher temperature increases enzyme activity, raising the rate of respiration. — Summarise that overall, a rise in temperature up to the optimum increases respiration rate.
Step-by-step solution
- State that respiration involves enzymes in glycolysis and the Krebs cycle.
- Explain that enzyme activity follows the Arrhenius equation, increasing with temperature.
- Mention that moderate temperature accelerates reaction rates up to an optimum.
- Note that beyond optimum, enzymes denature, reducing respiration.
- Summarise that overall, a rise in temperature up to the optimum increases respiration rate.
Common mistake: Assuming temperature has no effect
Concept tested: Temperature dependence of plant respiration
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