Answer: Penicillium roqueforti.
- A Lactobacillus
- B Saccharomyces cerevisiae
- C Penicillium roqueforti
- D Aspergillus niger
Correct answer: C. Penicillium roqueforti
Explanation: Roquefort cheese is ripened with the fungus Penicillium roqueforti, which gives it its distinctive blue-green mould and sharp flavour.
Sewage passes through physical removal (primary), then aerobic biological treatment where microbes form flocs that consume organic matter (secondary); the settled activated sludge is then digested anaerobically to produce biogas - a deliberate switch from aerobic to anaerobic conditions between stages.
Concept context
Microorganisms in food, medicine, sewage treatment, biocontrol, and biofertilizers