Biology 2nd Edition by Robert Brooker, Eric Widmaier ,Linda Graham ,Peter Stiling

Exercise 8

The gap junctions of animal cells differ from the plasmodesmata of plant cells in that
A) gap junctions serve as communicating junctions and plasmodesmata serve as anchoring junctions.
B) gap junctions prevent extracellular material from moving between adjacent cells but plasmodesmata do not.
C) gap junctions allow for direct exchange of cellular material between cells but plasmodesmata cannot allow the same type of exchange.
D) gap junctions are formed by specialized proteins that form channels through the membranes of adjacent cells but plasmodesmata are formed by connecting the plasma membranes of adjacent cells.
E) All of the above are correct.