[Campbell Biology P.851] What is a key distinguishing feature of plasmodesmata compared to g... | Practice Question
What is a key distinguishing feature of plasmodesmata compared to gap junctions, as described in the text?
A: Both plasmodesmata and gap junctions are involved in rapid, long-distance electrical signaling in their respective organisms.
B: Plasmodesmata are primarily static structures, whereas gap junctions are highly dynamic.
C: Plasmodesmata specifically allow the trafficking of macromolecules like proteins and various types of RNA, a capability not attributed to gap junctions.
D: Gap junctions are found in plants, facilitating water and nutrient transport, while plasmodesmata are exclusive to animal cells.
Explanation
The text explicitly states under 'Phloem: An Information Superhighway' that 'Although they are often likened to the gap junctions between animal cells, plasmodesmata are unique in their ability to traffic proteins and RNA.' This highlights their distinct capability to transport macromolecules, which is not a characteristic of gap junctions.