question_answer

During the transcription, if nucleotide sequence of DNA strand, is being coded as ATACG, then the nucleotide sequence of mRNA would be

A) UATGC        

B)  TATGC

C)  UAUGC        

D)  TATGG

Correct Answer: A

Solution :

 During the transcription, the base sequence (nucleotide sequence) of mRNA will be decided with base sequence in DNA. The nucleotide sequence of DNA strand is being coded as ATACG as given in the question. The complementry base pairing for mRNA during process of transcription will be as follows Given nucleotides of DNA strand \[\underset{U}{\overset{A}{\mathop{|}}}\,\,\,\,\,\,\,\underset{A}{\overset{T}{\mathop{|}}}\,\,\,\,\,\,\underset{U}{\overset{A}{\mathop{|}}}\,\,\,\,\,\,\underset{G}{\overset{C}{\mathop{|}}}\,\,\,\,\,\,\underset{C}{\overset{G}{\mathop{|}}}\,\] The nucleotide sequence of mRNA would be UAUGC.