Transport of a molecule across a cell membrane by facilitated diffusion ____.
A) does not exhibit specificity for a particular type of molecule
B) requires the input of energy
C) depends on a concentration gradient
D) goes against the concentration gradient
E) allows nonpolar uncharged molecules to diffuse across a membrane
Correct Answer:
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Q32: Which organelle's membrane contains the enzymes that
Q33: Polar and charged molecules typically cross the
Q34: A channel that opens in response to
Q35: Carrier proteins are often used by the
Q36: In what way do the various membranes
Q38: Aquaporins are _.
A) pores made of water
Q39: The selective permeability of a membrane refers
Q40: Which molecules most easily diffuse across a
Q41: For osmosis to occur, _.
A) a selectively
Q42: The voltage across a membrane is called
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