Becker's World of the Cell 9th Edition by Lewis Kleinsmith, Jeff Hardin, Gregory Paul Bertoni

Exercise 5

Cellular Junctions and Plasmodesmata. Indicate whether each of the following statements is true of adhesive junctions (A), tight junctions (T), gap junctions (G), and/or plasmodesmata (P). A given statement may be true of any, all, or none (N)of these structures.
(a)Associated with filaments that confer either contractile or tensile properties.
(b)Sites of membrane fusion are limited to abutting ridges of adjacent membranes.
(c)Require the alignment of connexons in the plasma membranes of two adjacent cells.
(d)Seal membranes of two adjacent cells tightly together.
(e)Allow the exchange of metabolites between the cytoplasms of two adjacent cells.