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Question

The movement of water molecules into and out of the cells takes place by:

A
Carrier proteins
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B
Symport systems
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C
Ion channels
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D
Osmosis
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E
Active transport
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Solution

The correct option is C Osmosis
The movement of water molecules in and out of the cell is guided by osmosis.
It often doesn't need special carrier proteins or ion channels. The movement is along the concentration gradient so it is not active transport.
Symport systems are a special kind of water pathways in plants.
So the correct answer is 'Osmosis'.

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