<prompt> RNA polymerase differs from DNA polymerase:It edits and synthesisSynthesise RNA primersSynthesis only in 5 to 3 directionUses RNA templates  <response>: Ans: b Synthesizes RNA primer Ref: Vasudevan, 4th ed, p. 406; 5th ed, p. 424; Lippincott, p.402DNA polymerases require a primer RNA primer where as RNA polymerase does not. This short primer is synthesized by primase RNA polymeraseComparison of dna and rna polymerase DNA POLYMERASERNAPOLYMERASE Nucleic acid synthesized5-3DNARNA Required template option dCopied 3 - 5DNADNA Required substratesd-ATP, d-GTP, d-CTP, d-TTPATP, GTP, CTP, UTP Required primerRNA DNANone Proof reading activity 3- 5 exonuclease YesNo certain DNA and RNA polymerases require RNA templates e.g., viruses.Similarities include: Newly synthesized strand is made in the 5-3 direction option c - so both synthesize in 5-3 direction. Template strand is scanned in the 3-5 direction. The new strand is complementary and anti parallel to the template. Each new nucleotide added to 3 end of growing strand. 