biochem multiple choice. need help with all questions within 45 min. thank you!

What is the correct order of transcription initiation events in E. coli? Binding of RNA polymerase, closed complex formation, open complex formation, promoter clearance, start of RNA synthesis. Binding of RNA polymerase, open complex formation, closed complex formation, start of RNA synthesis, promoter clearance. Binding of RNA polymerase, closed complex formation, open complex formation, start of RNA synthesis, promoter clearance. Binding of RNA polymerase,start of RNA synthesis, closed complex formation, open complex formation, promoter clearance. Binding of RNA polymerase, start of RNA synthesis, open complex formation, closed complex formation, promoter clearance. Which of these is a chemical difference between a eukaryotic mRNA and a prokaryotic mRNA? a stretch of 150 A residues at the 5 ' end the fact that it contains thymine in place of uracil the 5 ( 7 -methyl guanosine) cap the occasional use of As (arsenic) in place of P in the sugar-phosphate linkages Processing of a primary mRNA transcript in a eukaryotic cell normally involve attachment of a long poly( A ) sequence at the 3 ' end. excision of intervening sequences (introns). joining of exons. methylation of one or more guanine nucleotides at the 55 end. All of the above