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Curious George
Which of the following is true about movement of molecules across cell membranes?
a) ATP can be moved (pumped) by active transport across cell membranes
b) glucose moves by osmosis across cell membranes
c) O2 moves by simple diffusion across cell membranes
d) amino acids can cross cell membranes either by simple diffusion or active transport
If you can, can you explain how you get the answer? I can't decide between C & D
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