dangthatbro dangthatbro

19-10-2020
Biology

contestada

The channels in cell membranes that help substances to move in and out
of cells during active transport are made of
A. protein.
B. chlorophyll.
C. cytoplasm
D. carbohydrates.

Respuesta :

BrendansJohnson12 BrendansJohnson12

19-10-2020

Answer: proteins

Explanation:

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