Answer: Trichoderma polysporum.
- A Monascus purpureus
- B Aspergillus niger
- C Trichoderma polysporum
- D Penicillium chrysogenum
Correct answer: C. Trichoderma polysporum
Explanation: Cyclosporin A is produced by the fungus Trichoderma polysporum and is used as an immunosuppressant in organ transplants.
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