Question

What features do all reactions involving enzymes have in common?

Answer 1

The correct answer of the given question above would be PRECEDE AT DIFFERENT RATES OF REACTION. The features that all reactions involving enzymes have in common is that, the features precede at different rates of reaction. Hope this is the answer you are looking for. 

Answer 2

Answer:

All enzyme catalyzed reactions occur slowly in absence of enzyme but exhibit increased reaction rate in presence of the respective enzymes.

Explanation:

Enzymes are the biocatalysts that serve to increase the rate of the reactions without being used up. They are proteins in nature and work at optimum temperature and pH conditions. Enzymes speed up the chemical reactions by lowering down the activation energy required for a reaction to occur. The reduced activation energy is easily obtained by the reactants even at room temperature and the reaction proceeds towards production formation.

An enzyme-catalyzed reaction can occur in the absence of enzyme. However, when the required enzymes are absent, the reactions occur at a very slow rate due to the demand for higher activation energy.