Final answer:
The correct mRNA sequence made from the given DNA fragment ATC/GTT/GTA/CTG/TAG/GAT/AAA is UAG/CAA/CAU/GAC/AUC/CUA/UUU, which corresponds to option (a) after following the base pairing rules of transcription where DNA's adenine pairs with uracil in RNA and cytosine pairs with guanine.
Step-by-step explanation:
To determine which mRNA would be made from the given DNA fragment (ATC/GTT/GTA/CTG/TAG/GAT/AAA), we need to understand the process of transcription.
In transcription, DNA serves as a template for mRNA synthesis, with adenine (A) pairing with uracil (U), cytosine (C) pairing with guanine (G), guanine (G) pairing with cytosine (C), and thymine (T) pairing with adenine (A); within RNA, thymine is replaced by uracil.
Converting the given DNA sequence into mRNA:
- DNA: ATC/GTT/GTA/CTG/TAG/GAT/AAA
- mRNA: UAG/CAA/CAU/GAC/AUC/CUA/UUU
This corresponds to the mRNA sequence in option (a): UAC/CAA/CAT/GAC/AUC/CUA/UUU because this is the complementary sequence with the appropriate base pairing.
Remember that the DNA sequence given is in the 5' to 3' direction, and thereby the mRNA is constructed in the opposite 3' to 5' direction.