Question

By what mechanism does refrigeration at 4°c slow food spoilage by contaminating microbes?

Answer 1

Spoilage is basically a chemical reaction and chemical reactions take place more slowly if the environment is cooler. Moreover, the microbes are also not very active at lower temperatures and are unable to spoil the food.

Answer 2

Temperature control is the most efficient means of controlling microbial growth. At four degree Celsius, contaminating microbes growth will be hindered as they can not survive at this temperature.