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Question

A biological molecule has to move from the matrix of a mitochondrion to that of a plastid. The number of membranes it has to move across is


  1. 1

  2. 2

  3. 3

  4. 4


Solution

The correct option is D

4


Both the mitochondrion and the plastid are double-membraned organelles. Hence the molecule will have to move across a total of four membranes.
 

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