Membrane Structure and Function
Cholesterol is essential for normal membrane functions because it

spans the thickness of the bilayer
cannot be made by higher organisms
plugs up the cardiac arteries of older men
keeps membranes fluid.

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Membrane Structure and Function
In Fluid mosaic model, the biological membrane can be viewed as

three dimensional solutions of oriented lipids and globular proteins
two dimensional solutions of oriented lipids and carbohydrate
three dimensional solutions of oriented lipids and carbohydrate
two dimensional solutions of oriented lipids and globular proteins

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Membrane Structure and Function
Cholesterol is somewhat amphipathic due to

the three six-membered rings along with the single five-membered ring
the five-methyl groups along with the hydrocarbon chain
the long branched hydrocarbon along with the four hydrocarbon rings
the single hydroxyl along with the hydrocarbon nature of the remainder of the molecule

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