Pathogenic bacteria are capable of what?

• A. Causing disease or infection
• B. Not causing disease
• C. Always beneficial
• D. Always viruses

Answer: (A)

Pathogenic bacteria are defined by their ability to cause disease. They can invade tissues, multiply, and may produce toxins or provoke inflammatory responses that lead to infections or illness. That’s why the statement that they are capable of causing disease or infection is the best choice. In contrast, not all bacteria cause disease, some are harmless or beneficial, and viruses are a different type of organism entirely, so those other options don’t fit.