Question

Which of the following is NOT true about pathogenic bacteria?

They cause half of human diseases
Pathogenic bacteria that produce endotoxins must be alive to cause disease.
They typically cause disease through endotoxins or exotoxins
Some pathogenic bacteria can produce exotoxins that diffuse out of their cells.

Answer 1

Pathogenic bacteria cause disease in humans, but not exactly half of all diseases. Some pathogenic bacteria produce endotoxins that are released when they die, while others produce exotoxins that can diffuse out of their cells.

Step-by-step explanation:

Pathogenic bacteria are microorganisms that can cause disease in their hosts. They are responsible for a significant number of human diseases, although not exactly half. Some pathogenic bacteria produce endotoxins, which are toxins released from their cell walls when they die or are destroyed. However, not all pathogenic bacteria rely on endotoxins or exotoxins to cause disease. Some produce exotoxins that can diffuse out of their cells and directly cause damage to the host.

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