IB Biology SL C1.1.8 Effects on Enzyme Activity Questions

Practise interpreting enzyme-activity graphs and experiments, explaining how temperature, pH and substrate concentration change reaction rate and active-site function.

Exam points

Interpret temperature, pH and substrate-concentration graphs or tables to identify optimum conditions, saturation plateaus and denaturation-related declines.
Explain enzyme-rate changes using collision frequency, pH-dependent active-site bonding, conformational change and denaturation.
Compare or determine enzyme reaction rates from measured data, including substrate saturation and factor-dependent differences.

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Study C1.1.8—Effects on enzyme activity conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

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The image represents the structure of the enzyme Rubisco from common pea (Pisum sativum).

Figure for Question IB Biology SL C1.1.8 Effects on Enzyme Activity Questions question 1 — IB Biology SL

Outline one factor that could affect the activity of Rubisco.

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a	name of factor;
b	how it affects rate of reaction.

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IB Biology SL C1.1.8 Effects on Enzyme Activity Questions question 1