Q.

Which of the following is not true w.r.t porin proteins?

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a

Located in the outer membrane of chloroplast.

b

Located in outer membrane of mitochondria.

c

Allow the molecules up to the size of small proteins to pass through.

d

They are absent in all bacteria.

answer is D.

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Detailed Solution

Porins are proteins that form huge pores in the outer membranes of the plastids, mitochondria and some bacteria allowing molecules up to the size of small proteins to pass through.

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