Enzymes are.......

Which of the following statements about enzymes are correct?
$(i)$ They lack nucleophilic groups.
$(ii)$ They are highly specific.
$(iii)$ They catalyze reactions by lowering the activation energy of the reaction.
$(iv)$ Pepsin is a proteolytic enzyme.

Which of the following is known as the $fight-or-flight$ hormone?

During the action of enzyme "Zymase",glucose is converted into . . . . . . ,with the liberation of carbon dioxide gas.

Which enzyme is responsible for the conversion of maltose into glucose?

The incorrect statement regarding enzymes is: