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Membrane Structure and Function

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

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

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Membrane Structure and Function
Biological membranes are like water beds because

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

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Membrane Structure and Function
In active transport, the membrane structure that functions is

integral proteins
cholesterol
carbohydrates
hydrophobic molecules

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

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

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Membrane Structure and Function
Membrane lipids are

none of these
hydrophilic
ampiphillic
hydrophobic

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Membrane Structure and Function
Pinocytosis occurs in

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

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