Certified Dietary Manager (CDM) Practice Exam

Which of the following best describes a characteristic of aerobic microorganisms?

1. They can thrive in extreme temperatures

2. They require oxygen for survival

3. They produce energy in the absence of light

4. They are typically larger than anaerobes

The correct answer is: They require oxygen for survival

The characteristic that best describes aerobic microorganisms is their requirement for oxygen for survival. Aerobic microorganisms depend on oxygen as a part of their metabolic processes, specifically utilizing it for cellular respiration, where they convert glucose and oxygen into energy, carbon dioxide, and water. This necessity for oxygen distinguishes them from anaerobic microorganisms, which do not require oxygen and may even be harmed by its presence. The understanding of aerobic processes is crucial in various fields, including food safety, nutritional management, and healthcare, since the presence or absence of these microorganisms can significantly affect food quality and safety, as well as human health. By recognizing the specific needs and functions of aerobic microorganisms, dietary managers and food service professionals can implement effective control measures in food storage and preparation environments to prevent spoilage and contamination.