Multiple choice The structural component of HIV required for cell-cell fusion is ______________. p2 protein gp41 p24 gp120 p70 Reveal answer Fill a bubble to check yourself B Correct answer Explanation For the HIV infection to occur the cell fusion is essential. This is done by the transmembrane glycoprotein gp41. HIV-1 utilises two major co-receptors along with CD4 to bind to, fuse with, and enter target cells.