Biology 9700 · AS & A Level · Mode of action of enzymes

Mode of action of enzymes — practice question

The graph illustrates the progression of an enzyme-catalysed reaction at $30\degree\text{C}$. What is true at time $X$?

  • AMost enzyme molecules will have free active sites.
  • BThe number of available substrate molecules is high.
  • CThe number of enzyme-substrate complexes is low.
  • DThe rate remains the same if more enzyme is added.

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