Q. Consider the following statements regarding microorganisms:
1.All bacteria are pathogenic in nature and detrimental to human health.
2.Pathogens include a diverse group of organisms such as viruses, bacteria, fungi, and protozoa.
3.Archaea are a major class of microorganisms frequently associated with human infectious diseases.
How many of the statements given above are correct?
Answer: A
Notes:
Explanation:
- Statement 1 is incorrect: Most bacteria are harmless or beneficial (e.g., gut microbiota); only a small fraction are pathogenic.
- Statement 2 is correct: These are the primary categories of disease-causing agents.
- Statement 3 is incorrect: Interestingly, while Archaea are found in the human body, there are currently no known clear examples of human bacterial pathogens belonging to the Archaea domain.
