Question

Which fungus is commonly used in the commercial production of citric acid?

• A. Penicillium
• B. Aspergillus niger
• C. Saccharomyces cerevisiae
• D. Rhizopus

Hint:

Aspergillus niger is widely used in industry not only for citric acid but also for enzyme production.

Answer 1

The Correct Option is B

Concept: Certain fungi are widely used in industrial fermentation processes for the production of organic acids.
Step 1: Understanding citric acid production.}
Citric acid is produced commercially through fermentation using microorganisms under controlled conditions.
Step 2: Identifying the organism.}
Aspergillus niger is the most commonly used fungus for large-scale production of citric acid due to its high yield and efficiency.
Step 3: Eliminating other options.}

• Penicillium – Known for antibiotic production.
• Saccharomyces cerevisiae – Used in alcohol fermentation.
• Rhizopus – Used in some organic acid production but not primarily for citric acid.