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Ans : (4) RNA polymerase
RNA polymerase facilitates opening of DNA helix during transcription.
The enzyme enterokinase helps in conversion of : (1) Protein into polypeptides (2) Trypsinogen into trypsin (3) Caseinogen into casein (4) Pepsinogen into pepsin
The first phase of translation is : (1) Binding of mRNA to ribosome (2) Recognition of DNA molecule (3) Aminoacylation of tRNA (4) Recognition of an anti-codon