Answer: Monascus purpureus.
- A Trichoderma polysporum
- B Aspergillus niger
- C Monascus purpureus
- D Penicillium notatum
Correct answer: C. Monascus purpureus
Explanation: Statins are produced by the yeast Monascus purpureus and act as blood cholesterol-lowering agents (competitive inhibitors of cholesterol synthesis).
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