BI-1211
Lock-and-key model
Biology · Secondary 4 · Medium · Lock-and-key model
A diagram shows an enzyme with a substrate fitting into a specific region on the enzyme. Which statement best explains why only this substrate can bind?
- The substrate has a shape that is complementary to the enzyme’s active site.
- The substrate has the same shape as the whole enzyme molecule.
- The enzyme changes its active site to fit any substrate.
- The substrate binds anywhere on the enzyme surface.
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