Question

match the cell membrane structure to its description: tight junction. none of the listed responses is correct. buttonlike junctions that use linker proteins to hold adjacent cells together adjacent cells joined by a line of membrane proteins that form an impermeable junction adjacent cells held together by connexon proteins that form cylinders allowing ion flow between the cells’ cytoplasm i don’t know yet

Explanation:

To solve this, we recall the definition of tight junctions. Tight junctions (also called occluding junctions) are formed by a line of membrane proteins between adjacent cells, creating an impermeable barrier to prevent leakage between cells.

• The option "Buttonlike junctions that use linker proteins to hold adjacent cells together" describes desmosomes.
• The option "Adjacent cells held together by connexon proteins that form cylinders allowing ion flow between the cells’ cytoplasm" describes gap junctions.
• The option "Adjacent cells joined by a line of membrane proteins that form an impermeable junction" matches the definition of tight junctions.

Answer:

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