What are porins? What role do they play in diffusion?
Explanation Porins are any class of proteins whose molecules can form channels that are large enough to allow molecules up to the size of small proteins to cross through the membranes. They help in facilitated diffusion by forming huge pores in the outer membranes of the plastids, mitochondria and some bacteria so that small molecules and ions can be transported passively. Final Answer Porins are proteins that help in facilitated diffusion.
