Answer: The key enzyme of cholesterol synthesis.
- A The key enzyme of cholesterol synthesis
- B DNA polymerase enzyme of the liver cells
- C Pepsin in the stomach
- D ATP synthase of mitochondria
Correct answer: A. The key enzyme of cholesterol synthesis
Explanation: Statins act as competitive inhibitors of the enzyme responsible for the synthesis of cholesterol, thereby lowering its level in the blood.
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