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Membrane Structure and Function

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?

Phospholipid
Protein
Carbohydrate
Cholesterol

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

carbohydrates
cholesterol
hydrophobic molecules
integral proteins

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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
Pinocytosis occurs in

mitochondria of all cells
all prokaryotic cells
all eukaryotic cells
none of these

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Membrane Structure and Function
Biological membranes are like water beds because

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

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Membrane Structure and Function
The smooth endoplasmic reticulum (SER) is the site of

amino acid synthesis
carbohydrate synthesis
protein synthesis
phospholipid synthesis

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