Question

what structure seals the space between two cells and makes it impermeable?
a) tight junctions
b) adherens junctions
c) glycocalyx
d) desmosomes

Explanation:

Tight junctions form a continuous seal between cells, preventing the passage of substances through the intercellular space, making it impermeable. Adherens junctions mainly provide cell - cell adhesion. Glycocalyx is a carbohydrate - rich layer on the cell surface with functions like cell recognition. Desmosomes are strong cell - cell adhesion structures but do not make the intercellular space impermeable.

Answer:

a) Tight junctions