Question

which of the following best describes tight junctions? they consist of connexons surrounding a channel leading from one cell to its neighbor. they consist of the membrane plaques of adjacent cells anchored together; there is a space between cell membranes. they consist of transmembrane cell - adhesion proteins around the upper part of a cell and hold neighboring cells together. need help? review these concept resources. read about the concept

Explanation:

Tight junctions are formed by transmembrane cell - adhesion proteins around the upper part of a cell that seal neighboring cells together, preventing the passage of substances between them. Connexons are related to gap junctions, and the description of membrane plaques with a space between membranes is not characteristic of tight junctions.

Answer:

They consist of transmembrane cell - adhesion proteins around the upper part of a cell and hold neighboring cells together.