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Membrane Structure and Function

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

carbohydrates
amino acids
none of these
proteins

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Membrane Structure and Function
Peptidoglycan is a complex consisting of

mono-saccharide and protein
polysaccharide and protein
aminoacid and carbohydrate
oligo-saccharide and protein

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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
Cholesterol is essential for normal membrane functions because it

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

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Membrane Structure and Function
Biological membranes are like water beds because

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

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

hydrophobic molecules
integral proteins
carbohydrates
cholesterol

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