Question

Which of the following is an intrinsic parameter that affects microbial growth?

• A. \(\text{Temperature}\)
• B. \(\text{Water activity}\)
• C. \(\text{Time}\)
• D. \(\text{Atmospheric conditions}\)

Hint:

Reducing water activity helps control microbial growth and extends the shelf life of food.

Answer 1

The Correct Option is B

Step 1: Understanding microbial growth parameters. 
- Intrinsic parameters are inherent to the food itself and influence microbial growth. 
- Water activity \((a^{w})\) is one of the most critical intrinsic factors that control microbial survival. 
Step 2: Explanation of incorrect options. 
- Temperature (A), Time (C), and Atmospheric conditions (D) are extrinsic factors that affect microbial growth but are not intrinsic. 
Step 3: Selecting the correct option. Since water activity is an intrinsic parameter, the correct answer is (B) Water activity.