Multiple choice

What are the lipids, which constitute the largest percentage of the lipid weight of biological membranes?

  1. Glycoproteins

  2. Phosphatidate

  3. Sphingolipids and glycerophospholipids

  4. Cholesterol

  5. Steroids
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C Correct answer
Explanation

The hydrocarbon tails of these two lipids result in steric limitations to their packing such that they will form disc-like micelles. The structure of these micelles results from the interaction of the hydrophobic tails of the lipids and the exposure of the polar head groups to the aqueous environment. Glycerophospholipids have a glycerol backbone. Phosphtidylinositol is an example for glycerophospholipids. Sphingolipids are derivatives of the lipid sphingosine. Cerebroside is an example for sphingolipids.

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