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What is the significance of the protein-lined pits? a. protein attracts other proteins needed for atp synthesis within the cell. b. protein-lined pits are able to transport one molecule at a time down the concentration gradient within the cell. c. the polarity of proteins allows other polar molecules to attach and be transported in the cell by transport channels. d. receptors within the pits allow ligands to fuse and be transported into the cell by endocytosis.
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Temperatures in ponds and lakes vary by season. select the best answer from the choices provided t f
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Biology, 22.06.2019 15:10
Which of the following requires the use of energy and the of transport proteins to move a molecule across a cell membrane?
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