<prompt> Enzymes not impoant in testosterone biosynthesis5-aplha reductaseDelta 5-4 isomerase18 hydroxylaseAlpha hydroxylase  <response>: Progesterone is conveed to 18hydroxyprogestrone by 18 -hydroxylaseThese reactions are effected by hydroxylationThese specific hydroxylases are mono-oxygenasesRef: DM Vasudevan, 7th edition, page no: 665 