NEET 2010 Biology question

Which one of the following structure between two adjacent cells is an effective transport pathway

(1)Plastoquinones
(2)Endoplasmic reticulum
(3)Plasmalemma
(4)PlasmodesmataCorrect

Answer: (4)

Solution

Plasmodesmata are cytoplasmic channels that pass through the cell walls of adjacent plant cells and connect their cytoplasm (symplast); the endoplasmic reticulum is continuous through them as the desmotubule. They allow direct, effective transport of water, ions, small molecules and even some macromolecules

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Question ID VK-090575