Unit 3: Interaction and Interdependence
Topic 3.1: Enzymes and Metabolism Questions
Practice 20 exam-style questions for IB Biology Topic 3.1. Review the question stems below, then unlock the full Question Bank to access markschemes, model answers, and AI grading.
1Identify1 mark
In an investigation of how temperature affects an immobilized enzyme, the rate of reaction is recorded at each temperature.
Which type of variable is the rate of reaction?
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A graph plots the rate of an enzyme-controlled reaction against temperature.
The rate climbs to a peak at 37 degrees C and then falls.
Which point on the curve is the optimum temperature?
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On an energy profile, region X is the height of the curve where it begins, on the left-hand side.
What does region X represent?
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Which statement best describes an intracellular enzyme?
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After an enzyme has catalysed its reaction and released the products, what is the state of the enzyme?
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State what is meant by the term metabolism.
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Which feature is shared by all enzymes?
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What is the name for the specific region on an enzyme's surface where the substrate binds?
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State what is meant by the activation energy of a reaction.
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Which of these is an ANABOLIC process?
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State where an intracellular enzyme carries out its reaction.
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Which of the following is an application of immobilized enzymes?
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Which term describes ALL of the enzyme-catalysed chemical reactions that take place inside a living cell?
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Which of the following is the best example of an extracellular enzyme?
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When a substrate is bound into the active site of an enzyme, what is the structure formed called?
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State one application of immobilized enzymes.
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State the type of large biological molecule that all enzymes are made of.
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On a graph of reaction rate against substrate concentration, the rate eventually stays constant at a plateau.
State the term that describes the condition of the enzymes at this plateau.
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What is meant by the activation energy of a reaction?
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What happens to energy during an ANABOLIC reaction?
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