Which of these would be an example of a "secondary metabolite" fermentation product?

Name: Which of these would be an example of a "secondary metabolite" fermentation product?
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Question

Quizplus · Accepted Answer

Penicillin is a secondary metabolite because it is not essential for the growth and survival of the producing organism. In contrast, ethanol, acetone, butanol, and propanol are primary metabolites produced during fermentation, which are necessary for the organism's metabolism and growth.

Which of These Would Be an Example of a "Secondary