HUMAN NUTRITION

Detailed explanation-1: -Bacteria do not grow well in acidic conditions, which is why it is important to properly store low-acid foods (many vegetables, fruits, grains, etc.). Foods can be within the temperature danger zone for 4-6 hours before they must be either back to safe temperatures or discarded.

Detailed explanation-2: -Most bacteria grow best in foods with pH values of 6.0 to 8.0. However, a few bacteria prefer, and many others tolerate, the acidity of foods having pH values from 4.0 to 6.0. Bacteria that cause human diseases (pathogenic bacteria) will not grow in highly acid foods (pH below 4.6).

Detailed explanation-3: -Bacteria can inhabit a wide range of environmental conditions, including extremes in pH ranging from 1 to 11. The primary strategy employed by bacteria in acidic environments is to maintain a constant cytoplasmic pH value.