Question
Which of the lipids lacks fatty-acids?
A. Glycerol
B. Waxes
C. Cholesterol
D. Lipoprotein
Show Answer
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Correct Answer » C
Explanation
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- Cholesterol is present in tissues and plasma either as free cholesterol or combined with a long-chain fatty acid as cholesteryl ester, the storage form.
- In plasma, both forms are transported in lipoproteins.
- Cholesterol is important for the maintenance of the correct permeability and fluidity, and the outer layer of plasma lipoproteins.
- It is synthesized in many tissues from acetyl-CoA and is the precursor of all other steroids in the body, including corticosteroids, sex hormones, bile acids, and vitamin D.
- As a typical product of animal metabolism, cholesterol occurs in foods of animal origin such as egg yolk, meat, liver, and brain.
