Which of the following statements describes how enzymes differ from ordinary chemical catalysts?
enzymes are inorganic in nature.
enzymes catalyze select chemical reactions.
enzymes bind their substrates for a brief time.
enzymes increase the rate of a chemical reaction.

Option (b) is the correct answer.

Explanation:

A catalyst is a specie that helps in increasing the rate of a chemical reaction by lowering the activation energy. A catalyst does not get consumed in a chemical reaction.

Whereas an enzyme is a protein that helps in carrying out a specific biochemical reaction without itself getting consumed. An enzyme also increases the rate of a biochemical reaction.

Unlike catalysts, enzymes bind to a substrate by lock and key method. This means that reactant molecules have a lock and enzymes act as key. Therefore, enzymes bind at the specific site of a reactant.

Thus, we can conclude that the statement enzymes catalyze selective chemical reactions, describes how enzymes differ from ordinary chemical catalysts.

3 hours because it is a decent distance.