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Biomolecules and Enzymes
Quick questions on Enzymes and how they work: N(A)-Level Biology Biomolecules
4short 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 the effect of temperature?Show answer
As temperature rises towards the optimum (the best temperature, about 37 degrees Celsius for human enzymes), the rate of reaction increases. This is because the molecules move faster and collide more often. Above the optimum, the heat changes the shape of the active site so the substrate no longer fits. The enzyme is then denatured and stops working, so the rate falls sharply.
What is q1?Show answer
Define the term biological catalyst. [2 marks]
What is q2?Show answer
Explain why each enzyme works on only one substrate. [2 marks]
What is q3?Show answer
Explain what happens to an enzyme when it is heated well above its optimum temperature. [2 marks]
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