Why Are Some Xenobiotics Biodegraded Slower Than Crude Oil and Petroleum

question 45

Multiple Choice

Why are some xenobiotics biodegraded slower than crude oil and petroleum products?

• A) Xenobiotics were designed to inhibit microbial growth.
• B) Some xenobiotics are novel compounds that differ from naturally occurring chemicals, thus microorganisms have not yet evolved to effectively degrade them.
• C) Only cometabolic microbial processes degrade xenobiotics.
• D) Chlorinated compounds are so toxic that biodegradation is not possible.

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