Answer: Competitively inhibiting HMG-CoA reductase, a key enzyme in cholesterol biosynthesis.
- A Increasing hepatic bile acid production specifically to eliminate excess circulating cholesterol
- B Competitively inhibiting HMG-CoA reductase, a key enzyme in cholesterol biosynthesis
- C Blocking intestinal absorption of dietary cholesterol directly from ingested food sources
- D Enhancing LDL receptor expression mainly within liver cell membranes specifically
Correct answer: B. Competitively inhibiting HMG-CoA reductase, a key enzyme in cholesterol biosynthesis
Explanation: Statins competitively inhibit HMG-CoA reductase (3-hydroxy-3-methylglutaryl coenzyme A reductase), the rate-limiting enzyme in the mevalonate pathway for cholesterol biosynthesis in the liver.
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