Cell Membranes: Question Preview (ID: 24240)

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What is osmosis?
a) The diffusion of water into and out of a cell b) The movement of any material from a higher to lower concentration c) Using a vesicle to push materials out of a cell. d) Using a vesicle to pull materials into a cell.
Diffusion allows materials to move from ______ concentrations to _____concentrations.
a) higher to lower b) lower to higher c) lower to lower d) higher to higher
The rate of osmosis depends of how much material is in a solution?
a) True b) False c) d)
Steroids are made up of how many rings?
a) 4 b) 3 c) 2 d) 1
What is the function of a steroid in the cell membrane?
a) makes cell membranes more rigid b) allows polar molecules through the membrane c) allows nonpolar molecules through the membrane d)
Glycoproteins have what attached to them?
a) carbohydrate chain b) lipid chain c) amino acid chain d) dna chain
Integral proteins allow the passage of...
a) small polar molecules b) small nonpolar molecules c) large molecules brought in through vesicles d) small molecules brought out through vesicles
Surface proteins are located on...
a) one side of the cell b) all the way through the membrane c) d)
Integral proteins DO NOT go all the way through a cell membrane.
a) False b) True c) d)
Proteins are made of...
a) amino acids b) lipids c) cholestrol d) none of these
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