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Membrane Structure and Function

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

hydrophobic molecules
integral proteins
carbohydrates
cholesterol

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

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

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Membrane Structure and Function
Biological membranes are like water beds because

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

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Membrane Structure and Function
Lysozymes are found in

all of these
microbial cells
plant cells
animal cells

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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
proteins
none of these
carbohydrates

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