Biofuels Are Mainly Produced by

question 49

Multiple Choice

Biofuels are mainly produced by

• A) the breakdown of cell wall biopolymers into sugars that can be fermented.
• B) plants that convert hemicellulose into gasoline.
• C) the genetic engineering of ethanol-generating genes into plants.
• D) transgenic crops that have cell walls containing ethylene.
• E) plants that are easy to grow in arid environments.

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