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Membrane Structure and Function

Membrane Structure and Function
The movement of molecules across a membrane by passive transport does not require

internal energy
none of these
vibrational energy
an input of metabolic energy

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Membrane Structure and Function
The mesosomes may be the sites of

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

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

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

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Membrane Structure and Function
In membranes, lipids are

sphingolipids
glycerophospholipids
sterols
all of these

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Membrane Structure and Function
Membrane lipids are

hydrophilic
ampiphillic
none of these
hydrophobic

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Membrane Structure and Function
Which of the following is not found in membranes?

Glycolipids
Nucleic acids
Glycoproteins
Phospholipids

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