Which of the following hydrocarbon compounds are most recalcitrant to degradation during bioremediation, meaning that they stay in the environment longer than the others?
A) straight-chain hydrocarbons
B) methane
C) polycyclic hydrocarbons
D) natural gases such as ethane and propane

Question

Quizplus · Accepted Answer

Polycyclic hydrocarbons have multiple rings and are often highly toxic and carcinogenic. Due to their complex structure and toxicity, they are difficult to break down via bioremediation and often persist in the environment for long periods of time. Straight-chain hydrocarbons, natural gases such as ethane and propane, and even methane are comparatively more susceptible to bioremediation.

Which of the Following Hydrocarbon Compounds Are Most Recalcitrant to Degradation