Which Statement About Cell Junctions Is True

question 36

Multiple Choice

Which statement about cell junctions is true?

• A) Desmosomes and gap junctions contain keratin,whereas tight junctions contain collagen.
• B) Gap junctions and tight junctions have specialized protein channels called connexins,whereas desmosomes do not.
• C) Tight junctions and desmosomes have mechanical roles,whereas gap junctions facilitate communication between cells.
• D) Desmosomes and gap junctions are found in epithelial tissue,whereas tight junctions are found only in nerve cells.
• E) All cell junctions have different functions,though structurally they are the same.