Which is NOT a lipoprotein?

Question

BlackTom AI · Accepted Answer

To approach this question, I’ll evaluate each option in terms of whether it is a lipoprotein or not.
Option 1: chylomicron. Chylomicrons are classic lipoprotein particles formed in the intestine and responsible for transporting dietary triglycerides in the bloodstream. Therefore, this option is indeed a lipoprotein.
Option 2: HDL. High-density lipoprotein (HDL) is another well-known lipoprotein, involved in reverse cholesterol transport from tissues to the liver. So this option is a lipoprotein as well.
Option 3: choline. Choline is a nutrient and a component of certain phospholipids (for example, phosphatidylcholine) but it is not itself a lipoprotein particle. It does not form a lipoprotein complex inherently, which makes this option not a lipoprotein.
Option 4: LDL. Low-density lipoprotein (LDL) is a major lipoprotein particle that carries cholesterol in the blood and is a key example of a lipoprotein. Thus, this option is a lipoprotein.
In summary, three options (chylomicron, HDL, LDL) are lipoproteins, while the remaining option is not a lipoprotein.

Which is NOT a lipoprotein?

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