Answer: To prevent organ rejection after transplants.
- A As an antibiotic against bacterial infections
- B To lower blood cholesterol levels
- C To prevent organ rejection after transplants
- D As a clot-dissolving agent
Correct answer: C. To prevent organ rejection after transplants
Explanation: Cyclosporin A produced by Trichoderma polysporum is an immunosuppressant used to prevent organ rejection in transplant patients.
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