Active site — Science definition
The precise region of an enzyme where the substrate binds and the reaction takes place.
Where it is taught
- Enzymes — Investigating the Chemistry of Life, Life Science: Biology, Grade 10
In use
Each enzyme folds so that part of its surface forms an active site, a chemically selective region that binds its substrate or substrates (the reactant molecules it acts on); shape and interactions can change during binding.
Enzymes
Questions using active site
Problem 1
An inhibitor resembles the substrate and occupies the active site. What mechanism fits? Show the reasoning, not just the conclusion.
Hints
A falling rate does not establish the exact molecular mechanism without additional tests.
Answer and explanation
Competitive inhibition is consistent with competing for the substrate-binding site.