PSI Texas State Board Nail Tech practice exam

What is one of the primary functions of nonpathogenic bacteria?

1. Cause disease

2. Decompose organic matter

3. Help the body fight infections

4. All of the above

The correct answer is: Decompose organic matter

Nonpathogenic bacteria play a crucial role in various ecological and biological processes, one of which is the decomposition of organic matter. This function is essential for nutrient cycling in the environment, as these bacteria break down dead organic material into simpler substances, making nutrients available for plants and other organisms. While some bacteria can indeed help the human body fight infections by outcompeting harmful pathogens or by producing substances that inhibit their growth, the primary focus of nonpathogenic bacteria is not specifically related to human health. They contribute to numerous beneficial processes in various ecosystems, including soil fertility and the breakdown of pollutants through bioremediation. On the other hand, causing disease is a characteristic of pathogenic bacteria, which is not relevant to nonpathogenic forms. Therefore, selecting decomposition of organic matter as an answer aligns with the essential functions of nonpathogenic bacteria.