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Lipoprotein Classes and Functions

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Questions and Answers

What is the main function of phospholipids in lipoprotein structure?

To form the outer monolayer of the lipoprotein particle
To facilitate the transport of lipids through water (correct)
To bind to apolipoproteins as enzyme cofactors
To provide a core for triglycerides

Which of the following apolipoproteins is NOT a structural determinant of lipoproteins?

Apoprotein A
Apoprotein B
Apoprotein E
Apoprotein D (correct)

What is the primary function of chylomicrons in lipid transport?

To transport phospholipids from the liver to the brain
To transport triglycerides from the liver to adipose tissue
To transport dietary lipids from the intestine to the liver (correct)
To transport cholesterol from the liver to peripheral tissues

What is the role of cholesterol esters in lipoprotein structure?

To provide a hydrophobic core for triglycerides (A) Signup and view all the answers

Which lipoprotein class has the highest percentage of proteins?

HDLs (C) Signup and view all the answers

What is the function of apolipoprotein E in lipoprotein metabolism?

To ligate with lipoprotein receptors (B) Signup and view all the answers

Which apolipoprotein is a cofactor for lipoprotein lipase?

Apo C-II (B) Signup and view all the answers

What is the function of ACAT in cells?

Formation of cholesterol esters in cells (A) Signup and view all the answers

Which lipoprotein class is responsible for reverse cholesterol transport?

HDL (A) Signup and view all the answers

What is the function of LCAT in lipoproteins?

Formation of cholesterol esters in lipoproteins (C) Signup and view all the answers

Which apolipoprotein is a ligand for the LDL receptor?

Apo B-100 (B) Signup and view all the answers

What is the function of CETP?

Transfer of cholesterol esters from HDL to VLDL (A) Signup and view all the answers

What is the primary function of HDLs in the body?

Removal of excess cholesterol from tissue and lipoproteins (A) Signup and view all the answers

Which of the following is a function of apolipoproteins?

Formation of recognition sites for cell-surface receptors (B) Signup and view all the answers

What is the origin of VLDLs?

Liver (A) Signup and view all the answers

What is the function of IDLs?

Initial product formed in VLDL catabolism (C) Signup and view all the answers

Apolipoproteins are divided into how many groups by structure and function?

5 (B) Signup and view all the answers

What is the primary function of Chylomicrons?

Absorption of dietary fat and delivery to tissues/liver (D) Signup and view all the answers

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