This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Microbiology
True statement regarding Gap junctions among the following is 
Select and explain. 
A. Behave as conduits to allow the direct passage of ions and small molecules between the cytoplasms of adjacent cells, B. Are located on the apical membrane of cells, C. Consist of homologous proteins that are identical in the epithelia of different organs, D. Are also known as desmosomes
A: Behave as conduits to allow the direct passage of ions and small molecules between the cytoplasms of adjacent cells
Answer: A: Behave as conduits to allow the direct passage of ions and small molecules between the cytoplasms of adjacent cells 
Explanation: Gap junctions assist in coordinating the activities of adjacent cells within the epithelial sheet by allowing them to behave as syncytia with respect to the transfer of small molecules.