Porins are types of proteins which form pores of large sizes in the outer membranes of plastids such as chloroplast, mitochondria and the membranes in bacteria. They help in facilitating the passive transport of small-sized protein molecules.
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Welcome to the NCERT Solutions for Class 11 Biology - Chapter . This page offers a step-by-step solution to the specific question from Excercise 1 , Question 2: What are porins? What role do they play in diffusion?....
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Porins are proteins lined hydrophilic channels present in the outer membrane of plastids, mitochondria & some bacteria. They allow passage of large bio molecules, even small sized proteins as per diffusion gradient. Aqua potions are water channels for diffusion of water molecules across the plasma membrane as per osmotic gradients.
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