AP Biology Quiz
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CELLS
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A membrane consists of a phospholipid bilayer with no proteins. The hydrophobic interior strongly limits passage of polar and charged molecules. Consider two solutes: formamide (small, strongly polar due to a carbonyl and amine) and carbon monoxide (CO), which is small and relatively nonpolar. Both are uncharged. Temperature and concentration gradients are held constant.
Which solute would most likely have greater permeability across the bilayer?
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