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12 January, 08:32

How does each of the listed molecules cross the cell membranes water fructose oxygen carbon dioxide

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  1. 12 January, 12:04
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    Water moves through cell membrane via osmosis, diffusion (from high concentration to low concentration), or via special protein channels called aquaporins.

    Fructose as a sugar molecule (glucose also) goes through the membrane via protein channels such as GLUT1.

    Oxygen and carbon dioxide move across cell membranes via simple diffusion, a process that requires no energy input. The movement occurs down the gradient, from the higher to lower concentration.
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