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Membrane Structure and Function

Membrane Structure and Function
Membrane lipids are

none of these
ampiphillic
hydrophobic
hydrophilic

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Membrane Structure and Function
The model that is now known to be correct for the structure of biological membrane is

Page's model
Lac Operon model
Fluid mosaic model
Lock and Key model

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Membrane Structure and Function
Pinocytosis occurs in

all prokaryotic cells
all eukaryotic cells
mitochondria of all cells
none of these

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

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

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

Phospholipid
Carbohydrate
Protein
Cholesterol

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