Question

match the cell membrane structure to its description: tight junction. adjacent cells joined by a line of membrane proteins that form an impermeable junction; buttonlike junctions that use linker proteins to hold adjacent cells together; adjacent cells held together by connexon proteins that form cylinders allowing ion flow between the cells’ cytoplasm; none of the listed responses is correct; i dont know yet

Explanation:

To solve this, we recall the definition of a tight junction: Tight junctions are formed by membrane proteins that create a seal (impermeable junction) between adjacent cells, preventing leakage. The first option matches this description. The second option describes desmosomes (button - like, use linker proteins), the third describes gap junctions (connexon proteins, allow ion flow).

Answer:

A. Adjacent cells joined by a line of membrane proteins that form an impermeable junction