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Choose the correct statements
A.Porins allow the entry of small proteins present in the membrane of mitochondria, chloroplast and bacteria
B. When a living cell is kept in hypertonic solution, water potential is equal to solute potential
C. Carrier proteins will allow entry of all substances across the membrane, whereas pumps transport large molecules in a passive method
D. Bulk flow occurs by diffusion

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A,B

C,D

A,D

B,C

answer is A.

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Detailed Solution

C. Carrier proteins will allow entry of selective substances across the membrane, whereas pumps transport large molecules by active transport.
D. Bulk flow occurs due to pressure gradient between two points.

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