Final answer:
The option that does not describe the relationship between the shape of enzymes and the reactions they catalyze is d. The number of active sites. Both lock-and-key and induced fit models relate to the shape complementarity between enzymes and substrates.
Step-by-step explanation:
The question is asking which option does not describe the relationship between the shape of enzymes and the reactions they catalyze. The correct answer is d. The number of active sites. This option does not describe the shape relationship but rather the quantity of functional regions where substrates can bind on the enzyme. Both the lock-and-key model and the induced fit model are based on the premise that the active sites of enzymes are complementary to the shapes of their specific substrates. In the lock-and-key model, the active site and substrate fit exactly, whereas in the induced fit model, the active site is more flexible and can adjust its shape to fit the substrate.