Which Statement Explains How Gap Junctions Provide a Biological Advantage

question 88

Multiple Choice

Which statement explains how gap junctions provide a biological advantage to animals?

• A) The pores of gap junctions allow small molecules to pass from cell to cell, ensuring similar concentrations of signaling molecules in adjacent cells.
• B) Gap junctions traverse the narrow space between the cell membranes of two adjacent cells (the "gap") by means of channel structures called connexons.
• C) The channel pores in a gap junction are about 1.5 nm in diameter, which is too narrow for the passage of large molecules.
• D) The walls of a connexon in a gap junction are composed of six subunits of the integral membrane protein connexin.
• E) In adjacent cells, two connexons come together to form a gap junction that links the cytoplasms of the two cells.

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