What are xenobiotics?

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Multiple Choice

What are xenobiotics?

Xenobiotics are compounds that come from outside the organism’s own metabolism—foreign or synthetic chemicals not normally produced by living things. This makes them distinct from nutrients the organism uses for energy or growth, or from natural biopolymers like DNA, RNA, proteins, and polysaccharides. In the environment, microbes may encounter xenobiotics such as pesticides, solvents, and pharmaceuticals. Some microbes can metabolize these compounds using specialized enzymes, enabling detoxification or breakdown (biodegradation) rather than using them as standard nutrients. That’s why the description of xenobiotics as foreign or synthetic compounds not normally produced by living organisms best fits.

Xenobiotics are compounds that come from outside the organism’s own metabolism—foreign or synthetic chemicals not normally produced by living things. This makes them distinct from nutrients the organism uses for energy or growth, or from natural biopolymers like DNA, RNA, proteins, and polysaccharides. In the environment, microbes may encounter xenobiotics such as pesticides, solvents, and pharmaceuticals. Some microbes can metabolize these compounds using specialized enzymes, enabling detoxification or breakdown (biodegradation) rather than using them as standard nutrients. That’s why the description of xenobiotics as foreign or synthetic compounds not normally produced by living organisms best fits.

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