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Question

Which of the following cell junctions help in preventing leakage of substances cross a tissue?

A
Gap junctions
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B
Tight junctions
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C
Zonula adherens
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D
Desmosomes
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Solution

The correct option is B Tight junctions
Cell junctions are physical structures or complexes formed of proteins. They provide intercellular communication or communication between a cell and it's an extracellular matrix. Tight junctions help in preventing leakage of substances across a tissue or an organ. Gap junctions are involved in chemical and neural transmissions across cells while Zonula adherents or adhere junction provide a very tight contact.
So, the correct answer is 'Tight junction.'

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