Other Types of Lipoproteins 1 Quiz
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Questions and Answers

What is the composition of Lipoprotein X?

  • Low-density lipoproteins and high-density lipoproteins
  • Free cholesterol and triglycerides
  • Phospholipids and non-esterified cholesterol (correct)
  • Phospholipids and cholesterol esters

How are cholesterol esters delivered into HDL lipoproteins?

  • By LCAT converting free cholesterol into cholesterol esters (correct)
  • By the kidneys removing LCAT from cholesterol
  • By LDL receptors binding to cholesterol esters
  • By HDL transferring free cholesterol directly

What enzyme converts free cholesterol into cholesterol esters?

  • LCAT (correct)
  • Apo B-100
  • LDL
  • Apo C

How does Lipoprotein (a) differ from LDL in terms of clearance?

<p>Poorly cleared by LDL receptors (D)</p> Signup and view all the answers

What is the significance of elevated levels of Lipoprotein (a)?

<p>Increased risk of premature CHD and stroke (D)</p> Signup and view all the answers

Which condition leads to the production of Lipoprotein X?

<p>Biliary cirrhosis or cholestasis (C)</p> Signup and view all the answers

What is the charge of plasma lipoproteins at alkaline pH?

<p>Negatively charged (A)</p> Signup and view all the answers

How are plasma lipoproteins separated during electrophoresis?

<p>By charge (B)</p> Signup and view all the answers

What is the primary function of staining the various fractions after electrophoresis?

<p>To quantitatively assess the fractions (D)</p> Signup and view all the answers

Which band corresponds to VLDL in a fasting patient undergoing electrophoresis?

<p>pre-ß-band (D)</p> Signup and view all the answers

Why did Fredrickson use electrophoresis for dyslipidemia classification?

<p>To classify types of dyslipidemia (D)</p> Signup and view all the answers

What is the purpose of holding plasma/serum vertically at 4ºC for 18 hours?

<p>To note the appearance after refrigeration (C)</p> Signup and view all the answers

What does a clear subnatant with a creamy layer on top indicate?

<p><strong>Chylomicronemia (exogenous hypertriglyceridemia)</strong> (B)</p> Signup and view all the answers

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