Question

what are porins? what role did they perform in diffusion ?
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Answer 1

Answer:

porins are proteins which form huge pores in the outer membrane of plastids, mitochondria and in some bacteria. they act as a channel in that are specific to different types of molecules. membranes transport proteins,porins are large enough to allow passive diffusion.

Explanation:

Answer 2

Porins are beta barrel proteins that cross a cellular membrane and act as a pore, through which molecules can diffuse. Unlike other membrane transport proteins, porins are large enough to allow passive diffusion, i.e., they act as channels that are specific to different types of molecules.

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