<prompt> Squalene is the intermediate product during synthesis of:VLDLCholesterolTachysterolLonosterol  <response>: Squalene is formed from six isoprenoid units. It cyclizes to give rise to parent steroid ionosterol from which cholesterol is formed. Must Know: The biosynthesis of cholesterol may be divided into five steps: 1 Synthesis of mevalonate from acetyl-CoA ; 2 Formation of isoprenoid units from mevalonate by loss of CO2 ; 3 Condensation of six isoprenoid units to form squalene ; 4 Cyclization of squalene give rise to the parent steroid, lanosterol. 5 Formation of cholesterol from lanosterol. Ref: Botham K.M., Mayes P.A. 2011. Chapter 26. Cholesterol Synthesis, Transpo, Excretion. In D.A. Bender, K.M. Botham, P.A. Weil, P.J. Kennelly, R.K. Murray, V.W. Rodwell Eds, Harpers Illustrated Biochemistry, 29e. 