Biology, 26.03.2021 17:00 ronniethefun

Certain substances can't pass through the membrane but need to get in/out. What can cells use to allow specific substances in/out, "doors"
A. Protein tunnels
B. Protein ions
C. Protein channels
D. Protein stations

please don’t give me the link to get the answer .. it doesn’t work

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Certain substances can't pass through the membrane but need to get in/out. What can cells use to al...