Which molecule separates the conteins inside of the cell from the contents outside of the cell

Donde se encuentra el adn nuclear en un organismo eucariota?

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.

Number and variety of living organism; includes genetic, species, and ecological types