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Energy and Equilibrium
Quick questions on Enzymes and the induced fit model: H2 Biology Energy and Equilibrium
5short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is enzymes lower activation energy?Show answer
Every reaction needs a minimum input of energy, the activation energy, to get started. An enzyme is a biological catalyst that lowers the activation energy, so the reaction proceeds faster at the temperatures found in living cells. The enzyme is not used up and can be used again.
What is the induced fit model?Show answer
The accepted model proposes that the active site is not a perfect fit initially. When the substrate binds, the active site changes shape to mould around it. This induced conformational change places strain on the substrate's bonds and is what drives catalysis, explaining enzyme action better than a rigid fit.
What is q1?Show answer
State what is meant by the active site of an enzyme. [1 mark]
What is q2?Show answer
Explain how an enzyme increases the rate of a reaction. [2 marks]
What is q3?Show answer
Give one way the induced fit model differs from the lock and key model. [1 mark]
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