Question

Which lipoprotein has the highest percentage of proteins? Which lipoprotein has the highest percentage of cholesterol plus cholesterol esters? Which two lipoproteins are TAG-rich? Which lipoprotein contains dietary lipids?

a) HDL; LDL; VLDL, Chylomicrons
b) LDL; HDL; Chylomicrons, VLDL
c) VLDL; HDL; Chylomicrons, LDL
d) Chylomicrons; LDL; HDL, VLDL

Answer 1

High Density Lipoprotein (HDL) has the highest percentage of proteins, Low Density Lipoprotein (LDL) has the highest percentage of cholesterol plus cholesterol esters. Very Low Density Lipoprotein (VLDL) and Chylomicrons are TAG-rich lipoproteins. Chylomicrons contain dietary lipids.

Step-by-step explanation:

The lipoprotein that has the highest percentage of proteins is High Density Lipoprotein (HDL). HDL is composed of 33% proteins and 67% lipids, mainly phospholipids and cholesterol.

The lipoprotein that has the highest percentage of cholesterol plus cholesterol esters is Low Density Lipoprotein (LDL). LDL contains 21% proteins and 79% lipids.

The two lipoproteins that are TAG-rich are Very Low Density Lipoprotein (VLDL) and Chylomicrons. VLDL and Chylomicrons both contain a high percentage of triglycerides (TAGs).

The lipoprotein that contains dietary lipids is Chylomicrons. Chylomicrons transport dietary lipids, such as triglycerides and cholesterol, from the small intestine to other tissues.