What are toxins?

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Multiple Choice

What are toxins?

Explanation:
Toxins are poisonous substances produced by living organisms. In microbiology, many toxins come from bacteria (and other microorganisms) and can harm cells, tissues, or whole organisms. That description—poisonous substances produced by some microorganisms—best captures what toxins are. The other ideas describe movement mechanisms or cellular structures, not poisonous chemicals.

Toxins are poisonous substances produced by living organisms. In microbiology, many toxins come from bacteria (and other microorganisms) and can harm cells, tissues, or whole organisms. That description—poisonous substances produced by some microorganisms—best captures what toxins are. The other ideas describe movement mechanisms or cellular structures, not poisonous chemicals.

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