Practise IB Biology SL 1.1.7 by linking enzyme tertiary structure to complementary active sites and substrate-specific catalysis.
Some proteins in membranes act as enzymes. Outline enzyme-substrate specificity.
enzyme shape is specific to (particular) substrate;
lock and key analogy/model; example of specific enzyme and substrate; has specific 3-D/tertiary configuration/3-D/tertiary shape essential to functioning; active site on enzyme binds to substrate; substrate and active site complementary/fit together;
(substrate and active site) are complementary due to structure/chemical attraction; enzyme-substrate complex forms;
denaturation changes enzyme's binding ability (to specific substrate);
Marking guidance:
Award [6] for the above points clearly shown in an annotated diagram.