Ncert Exercises & Solutions

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Q.1 Smaller, lipid soluble molecules diffuse faster through cell membrane, but the movement of hydrophilic substances are facilitated by certain transporters which are chemically ......... .

Proteins

The movement of hydrophilic substances are facilitated by transporters which are chemically proteins. These proteins form porins, which are huge pores in the outer membranes of the plastids, mitochondria, and some bacteria. These porins allow the small molecules to pass through the membrane.

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