[vì sao các quốc gia] [Hai b%A8%A2] [NGá»® VÄ‚N 10] [Phҡ�] [D�� nh] [A cell needs to transport large molecules across its membrane against a concentration gradient. Which process would be most appropriate? Simple diffusion moving molecules down concentration gradients passively Facilitated diffusion using protein channels to assist molecular movement Osmos] [Cuá»™c săn tÃÆâ€â] [����������PPT] [la port] [luyện kiếm]