Which of the following methods is used to preserve food by slowing the metabolic processes of foodborne microbes?

A) lyophilization

B) nonionizing radiation

C) freezing

D) ionizing radiation

C

Explanation:

Freezing slows down the metabolic processes of life usually by slowing down enzymatic activities that catalyze biochemical reactions even in bacteria that cause food spoilage. Lowering the temperate reduces the energy of molecules - hence they vibrate less - including those of enzyme hence they become slower in catalyzing reactions. All biochemical reactions will, therefore, occur at very slow rates and the bacterial will or reproduce at normal rates hence reducing food spoilage.