Which of the following is not a feature of an enzyme?

a. It accelerates a chemical reaction without itself being affected by the reaction.

b. It controls chemical reactions within living systems.

c. It elevates the amount of activation energy required.

d. It is substrate-specific.

e. It possesses a unique three-dimensional molecular shape.

f. Names usually end in ase.

g. Each has an optimal temperature at which they react more rapidly.

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