Cholesterol Synthesis and Functions Quiz
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Questions and Answers

Where does the synthesis of cholesterol occur in the cell?

  • Cytoplasm (correct)
  • Endoplasmic reticulum
  • Mitochondria
  • Nucleus
  • Which tissues contribute the most to the cholesterol pool in the body?

  • Reproductive tissues (correct)
  • Adipose tissue
  • Connective tissue
  • Muscle tissue
  • What provides the reducing equivalents for cholesterol synthesis?

  • ATP
  • FADH2
  • NADPH (correct)
  • NAD+
  • What is the precursor molecule for cholesterol synthesis?

    <p>3-hydroxy-3-methylglutaryl (HMG) CoA</p> Signup and view all the answers

    What is the role of Hexose Monophosphate in cholesterol synthesis?

    <p>Produces cholesterol endogenously</p> Signup and view all the answers

    What is the structural role of cholesterol in membranes?

    <p>Modulating membrane fluidity</p> Signup and view all the answers

    What is the primary function of cholesterol in the body?

    <p>Serving as a precursor for bile acids and steroid hormones</p> Signup and view all the answers

    Which of the following is a product of cholesterol metabolism?

    <p>Bile salts</p> Signup and view all the answers

    Which tissues can efficiently oxidize ketone bodies according to the text?

    <p>Extrahepatic tissues excluding those lacking mitochondria</p> Signup and view all the answers

    What is the consequence of an elevation in ketone body concentration in the blood?

    <p>Acidemia (ketoacidosis)</p> Signup and view all the answers

    Which of the following is true about the use of ketone bodies by peripheral tissues?

    <p>Extrahepatic tissues lacking mitochondria efficiently oxidize ketone bodies</p> Signup and view all the answers

    What is the rate-limiting step in cholesterol synthesis?

    <p>Synthesis of mevalonate</p> Signup and view all the answers

    Which enzyme is a major control point in cholesterol synthesis?

    <p>HMG CoA reductase</p> Signup and view all the answers

    In cholesterol degradation, what happens to the sterol nucleus?

    <p>It is converted to bile acids and bile salts</p> Signup and view all the answers

    Which pathway eliminates the sterol nucleus in the degradation of cholesterol?

    <p>Synthesis of bile acids</p> Signup and view all the answers

    What is the function of bile acids in digestion?

    <p>Emulsify fats in the intestines</p> Signup and view all the answers

    Which compound passes directly from the liver into the duodenum or is stored in the gallbladder?

    <p>Bile acids</p> Signup and view all the answers

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