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Answer: 3. Saccharomyces cerevisiae : Ethanol

Key idea: Match each microbe with a real product.

  • Methanobacterium makes methane (biogas), not lactic acid.
  • Penicillium notatum makes the antibiotic penicillin.
  • Saccharomyces cerevisiae (yeast) ferments sugar to ethanol. Correct.
  • Acetobacter aceti makes acetic acid.

Answer: (3).

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report
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