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Question

Choose the incorrect statement with respect to the cell membrane:


A

Generally smaller molecules pass easily and readily as large molecules.

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B

Water-soluble substances pass through it less readily than lipid-soluble substances.

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C

Membranes are selectively permeable

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D

None of these

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Solution

The correct option is D

None of these


The correct option is D

Explanation of the correct option:

  1. The cell membrane also referred to as the plasma membrane, isolates the cell inside from its surroundings.
  2. It is composed of a lipid bilayer, and the membrane is selectively permeable because of the transporters that enable molecule entry and exit.
  3. Due to the membrane's hydrophobic nature, tiny neutral molecules can move across it with ease.
  4. Water is a tiny molecule, thus chemicals that are soluble in it can also move through with ease.

Final answer: None of these here is the correct option.


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