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Membrane Structure and Function

Membrane Structure and Function
Membrane lipids are

ampiphillic
hydrophobic
hydrophilic
none of these

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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?

Carbohydrate
Protein
Cholesterol
Phospholipid

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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
cannot be made by higher organisms
spans the thickness of the bilayer
keeps membranes fluid.

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

none of these
carbohydrates
amino acids
proteins

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Membrane Structure and Function
Peptidoglycan is a complex consisting of

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

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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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