The diagram shows an enzyme, its substrate and an enzyme/substrate complex.
Which statement explains how the substrate is able to enter the active site of the enzyme?
Contact between the substrate and the enzyme causes a change in the enzyme shape.
2 )
The shape of the active site and the shape of the substrate are complementary.
3 )
The substrate within the active site forms hydrogen bonds with amino acids.
4 )
When the enzyme/substrate complex forms, the tertiary structure of the enzyme changes.
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