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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
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
Which type of molecule spans the membrane, from its inner to outer surface according to the Fluid mosaic model of cell membranes?

Protein
Cholesterol
Carbohydrate
Phospholipid

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

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

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

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

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

amino acids
none of these
carbohydrates
proteins

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