Question

The extrinsic factors affecting growth of microorganisms are:

• A. pH, Temperature, Redox potential
• B. Temperature, Relative humidity, gases in environment
• C. Water activity, Temperature
• D. pH, Temperature, water activity

Hint:

To remember the difference: Intrinsic factors are "Inside" the food (pH, moisture), while Extrinsic factors are "External" (storage temp, humidity).

Answer 1

The Correct Option is B

Factors affecting microbial growth in food fall into two groups. Intrinsic factors come from the food itself, its pH, water activity and redox potential. Extrinsic factors come from the surroundings where the food is stored, such as storage temperature, the relative humidity of the air, and the gases present in the environment. Since the question asks about the external, storage side factors, the answer is temperature, relative humidity and gases in the environment.