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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

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

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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
plugs up the cardiac arteries of older men
cannot be made by higher organisms

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

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

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Membrane Structure and Function
The smooth endoplasmic reticulum (SER) is the site of

phospholipid synthesis
amino acid synthesis
protein synthesis
carbohydrate synthesis

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Membrane Structure and Function
In membranes, lipids are

glycerophospholipids
sterols
all of these
sphingolipids

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Membrane Structure and Function
Bacteriorhodopsin

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

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