Answer: Gap junctions.
- A Tight junctions
- B Gap junctions
- C Plasmodesmata
- D Nuclear pores
Correct answer: B. Gap junctions
Explanation: Gap junctions consist of connexons (hemichannels). Two cells each contribute a connexon; together they form a channel for ion/molecule transfer.
Animal cell structure with major organelles labeled. Image: LadyofHats (Mariana Ruiz), Public Domain, via Wikimedia Commons.
Concept context
Cell theory, prokaryotic vs eukaryotic cells, organelles and their functions. Foundation of all biology.