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State the chemical composition of the sterol that is present in high levels in most people who belong to the high risk group.  Distinguish between the good and bad forms of the sterol. A middle age man has been diagnosed with being at high risk of developing coronary artery disease.

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You can only ask one question at a time so I edited down accordingly.  People at high risk for coronary artery disease have various risk factors including poor diet, smoking, and family history.  One major risk factor is elevated levels of cholesterol.  Chemically, cholesterol is a fatty steroid alcohol.  Like other steroids, it has four fused ring systems (three six membered rings and one five membered ring) called the...

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