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Membrane Structure and Function

Membrane Structure and Function
In membranes, lipids are

sterols
all of these
glycerophospholipids
sphingolipids

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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?

Cholesterol
Carbohydrate
Phospholipid
Protein

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Membrane Structure and Function
The plasma membrane is a selectively permeable barrier due to presence of specific transport

amino acids
carbohydrates
none of these
proteins

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Membrane Structure and Function
Membrane lipids are

hydrophilic
hydrophobic
none of these
ampiphillic

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

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

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

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

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