Official 39 Lec 4
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Question 4 of 6
The professor describes the current method for producing cellulosic ethanol. What are the two important steps she mentions?

A.

Yeast is added to cellulose to create an enzyme.

B.

An enzyme breaks down cellulose into sugars.

C.

Microorganisms ferment sugars into alcohol.

D.

Ethanol is extracted from certain microorganisms.

我的答案:

正确答案:BC

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