試題詳解

29. Which of the following statements regarding cell-cell and cell-matrix adhesion is incorrect?
1. The major families of cell surface adhesion molecules include integrins.
2. Vertebrate gap junctions are composed of adherins.
3. A tight junction is made up of integrins.
4. NCAMs, a group of cell-adhesion proteins belonging to the Ig superfamily, bind to proteoglycans.
(A) 1 and 2
(B) 1 and 3
(C) 2 and 3
(D) None of above
(E) All of above