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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?

Poorly cleared by LDL receptors Signup and view all the answers

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

Increased risk of premature CHD and stroke Signup and view all the answers

Which condition leads to the production of Lipoprotein X?

Biliary cirrhosis or cholestasis Signup and view all the answers

What is the charge of plasma lipoproteins at alkaline pH?

Negatively charged Signup and view all the answers

How are plasma lipoproteins separated during electrophoresis?

By charge Signup and view all the answers

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

To quantitatively assess the fractions Signup and view all the answers

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

pre-ß-band Signup and view all the answers

Why did Fredrickson use electrophoresis for dyslipidemia classification?

To classify types of dyslipidemia Signup and view all the answers

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

To note the appearance after refrigeration Signup and view all the answers

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

Chylomicronemia (exogenous hypertriglyceridemia) Signup and view all the answers