NEET Biology question
Which of the following statements about cell junctions are correct? (i) All the cells of the epithelium are held together with little intercellular materials. (ii) In almost all animal tissues specialised junctions provide both structural and functional link between their individual cells. (iii) Tight junctions prevent substances from leaking across a tissue. (iv) Adhering junctions provide cementing to keep neighbouring cells together. (v) Gap junctions provide cytoplasmic channels between cells for passage of ions, small molecules and sometimes big molecules.
Solution
All five statements correctly describe cell junctions: epithelial cells are held tightly together with minimal intercellular material; specialised junctions provide both structural and functional links across animal tissues generally; tight junctions
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