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Membrane Structure and Function

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

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

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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
Fluid mosaic model
Page's model

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Membrane Structure and Function
Lysozymes are found in

plant cells
animal cells
all of these
microbial cells

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Membrane Structure and Function
Membrane lipids are

hydrophobic
hydrophilic
ampiphillic
none of these

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

proteins
amino acids
carbohydrates
none of these

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

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

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