Question

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

• A. Gap junctions
• B. Tight junctions
• C. Zonula adherens
• D. Desmosomes

Answer 1

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.'