Biochemistry

Lesson 7Readpages 1-5of the case study, “Statins Stat!” (see attached pdf below), andanswer the following questions.1.       Why are high density lipoproteins (HDLs) considered the “good cholesterol”? In your answer explain specifically what HDLs do that cause it to be considered the “good cholesterol”.2.       Why are low density lipoproteins (LDLs) considered the “bad cholesterol”? In your answer explain specifically what LDLs do that cause it to be considered the “bad cholesterol”.3.       What is the role of the phospholipid monolayer at the outer surface of lipoprotein particles? (Question 1 of case study)4.       Why are cholesterol, cholesteryl esters, and triglycerides preferentially contained inside lipoprotein particles? (Question 2 of case study)5.       What are the two sources of cholesterol in the human body?6.       What is a “committed step” in a biochemical pathway? (Question 3 of case study)7.       Looking at Figure 4 of case study (the reaction pathway from acetyl-CoA), which enzyme is likely to be the target of the statin mevastatin? (Question 6 of case study)8.       What are four (4) ways that HDL levels can be increased in the body?9.       What type of inhibitor (non-competitiveORcompetitive) are statins with respect to HMG-CoA reductase enzyme activity? Explain why.10.    How were cholesterol-lowering statin drugs first discovered?You will earn 10 pts for correctly answering each question (total points earned is 100).  You may use the Internet and/or your textbook to assist you, but please DO NOT copy your answers directly from the Internet or textbook.

 

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