Gap Junctions are Formed By

Question

Gap junctions are formed by
A)groups of 8-12 connexons making a pore in one cell.
B)groups of 4-6 innexins or connexins forming a pore in one cell.
C)connexons from adjacent cells connecting with each other to form a cytoplasmic bridge.
D)both A and C
E) both B and C

Accepted Answer

Gap junctions are formed by the connection of two connexons, each made up of 4-6 connexin proteins, from adjacent cells to form a pore, allowing for direct communication and exchange of small molecules between the cells. Innexins are the invertebrate equivalent of connexins. Therefore, option E is the correct answer. Option A is incorrect as it incorrectly mentions a group of 8-12 connexons which is not the case. Option B is incorrect as it mentions only innexins while connexins are also involved in gap junction formation. Option C correctly mentions the connection of connexons between adjacent cells but falsely mentions a cytoplasmic bridge which is not formed in the process.