Which of these cell junctions form a barrier to the passage of materials?

a. plasmodesmata

b. desmosomes (anchoring junctions)

c. keratin fibers

d. gap (communicating) junctions

e. tight junctions

e. tight junctions

Explanation:

Tight junctions -

It is the junction between the plasma membrane of the call with the near by adjacent cells, it acts as a barrier for the molecules and the ions from entering the cell or leaving the cell.

Hence, from the statement given in the question, the correct term is e. tight junctions.