The correct answer for the question that is being presented is this one: "a. GCU AGA." The <span>strand of mRNA that would be made during transcription using the DNA strand, '</span>CGA TCT ' is this: GCU AGA.
Cytosine is paired with Guanine, Adenine is paired with Uracil. Thymine is paired with Adenine.<span />
Transcription is a process of copying DNA into mRNA. DNA contains two complementary strands. Complementarity is achieved through interactions between nucleobases. In the DNA, base complements are adenine - thymine and guanine - cytosine. In the RNA, </span>base complements are adenine - uracil <span>and guanine -cytosine. During the transcription, bases complementary to a template DNA strand pairs to form mRNA. In this case, if DNA strand is CGA TCT, mRNA strand will be GCU UGU: DNA: CGA TCT RNA: GCU UGU</span>
