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Membrane Structure and Function

Membrane Structure and Function
Membrane lipids are

hydrophilic
none of these
hydrophobic
ampiphillic

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Membrane Structure and Function
The smooth endoplasmic reticulum (SER) is the site of

carbohydrate synthesis
phospholipid synthesis
protein synthesis
amino acid synthesis

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Membrane Structure and Function
The mesosomes may be the sites of

RNA replications and specialized cyclic reactions
None of these
DNA replication and specialized enzymatic reactions
RNA replications and specialized enzymatic reactions

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

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

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Membrane Structure and Function
Biological membranes are like water beds because

All of these
they (normally) do not leak their contents
the membrane is thin compared to the enclosed volume
they are always moving

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Membrane Structure and Function
Which type of molecule spans the membrane, from its inner to outer surface according to the Fluid mosaic model of cell membranes?

Phospholipid
Carbohydrate
Cholesterol
Protein

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