Which of the following best describes microbiological contaminants?

• A. Sterile particles that do not affect microbial growth
• B. Chemical substances that inhibit microbial activity
• C. Unwanted microorganisms present in a sample or environment
• D. Beneficial bacteria used in fermentation

Answer: (C)

Verified step by step guidance

1. Understand the term 'microbiological contaminants' by breaking it down: 'microbiological' relates to microorganisms, and 'contaminants' are unwanted substances or organisms.
2. Recall that contaminants in microbiology typically refer to organisms that are not intended to be present and may interfere with experiments, processes, or environments.
3. Evaluate each option by considering whether it fits the idea of 'unwanted microorganisms' rather than sterile particles, chemicals, or beneficial bacteria.
4. Recognize that sterile particles do not contain living organisms, so they cannot be microbiological contaminants.
5. Conclude that microbiological contaminants are best described as unwanted microorganisms present in a sample or environment, as this aligns with the definition and context.