Question

Some of the industrial products are produced by fermentation processes. Identify the correct pair of product and fermentative microorganism.

• A. Vinegar – Acetobacter aceti
• B. Citric acid – Enterobacter aerogenes
• C. Ethanol – Saccharomyces cerevisiae
• D. L-Lysine – Aspergillus niger

Hint:

Remember: \(\bullet\) Vinegar → {Acetobacter} \(\bullet\) Citric acid → {Aspergillus niger} \(\bullet\) Ethanol → {Saccharomyces cerevisiae} \(\bullet\) L-Lysine → {Corynebacterium glutamicum}

Answer 1

The Correct Option is A, C

Step 1: Recall key industrial microbes. \(\bullet\) Vinegar: Produced by oxidation of ethanol to acetic acid by Acetobacter aceti. ✔️
\(\bullet\) Citric acid: Industrially produced by Aspergillus niger, not Enterobacter aerogenes. ❌
\(\bullet\) Ethanol: Produced by alcoholic fermentation of sugars using yeast, primarily Saccharomyces cerevisiae. ✔️
\(\bullet\) L-Lysine: Produced mainly by fermentation using Corynebacterium glutamicum, not Aspergillus niger. ❌
Step 2: Conclusion. Correct product–microorganism pairs are (A) Vinegar – Acetobacter aceti and (C) Ethanol – Saccharomyces cerevisiae.