Which of the following statements is not true regarding 5' cap of mRNA :
5' terminal of mRNA is capped by 7-methylguanosine triphosphate 5' cap contains 2'-O-methyl ribonucleoside adjacent to it. Cap is attached to the 5' end of mRNA through 5' to 3' phosphodiester bond. 7-methylguanosine is attached to mRNA through three intervening phosphate groups