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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

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

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

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

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

integral proteins
cholesterol
hydrophobic molecules
carbohydrates

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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?

Protein
Carbohydrate
Cholesterol
Phospholipid

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Membrane Structure and Function
Pinocytosis occurs in

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

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Membrane Structure and Function
Bacteriorhodopsin

is an integral membrane protein
contains primarily alpha-helical residues
All of these
absorbs light and pumps protons

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