A nurse is educating a patient about how statin medications…

A nurse is educating a patient about how statin medications lower cholesterol. Which of the following statements accurately describes the mechanism of action of statins? Statins reduce blood cholesterol by blocking an enzyme required for cholesterol production in the liver. Statins lower serum cholesterol levels by inhibiting the intestinal absorption of cholesterol. Statins increase the number of LDL receptors on the liver, enabling the removal of more LDL cholesterol from the bloodstream. Statins can increase levels of HDL cholesterol.

The following is an excerpt from a recent scientific publica…

The following is an excerpt from a recent scientific publication:“A protein can be identified based on each level of its structure…. The primary structure… linear chain… The quaternary structure… is formed through side‑chain interactions between 2 or more polypeptides.” What distinguishes quaternary from tertiary structure?