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3 votes
Which is a form of active transport?

Proteins create openings on another side of the cell membrane.

Proteins open up channels in the cell membrane.

Proteins enter and exit the cell freely.

Proteins push molecules through the cell membrane.

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User Mickie
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2 Answers

3 votes
The first one???????
answered
User MCS
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3 votes

Proteins push molecules through the cell membrane.

answered
User Kravi
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