To determine the nucleotide sequence of the mRNA strand transcribed from the given DNA sequence, we need to understand that mRNA is synthesized based on the DNA template strand.
The DNA sequence provided is: ggtagcatgctabcctacgcccaucgggtagc. During transcription, the DNA base pairs are converted to RNA base pairs:
- Adenine (A) in DNA pairs with Uracil (U) in RNA
- Thymine (T) in DNA pairs with Adenine (A) in RNA
- Guanine (G) in DNA pairs with Cytosine (C) in RNA
- Cytosine (C) in DNA pairs with Guanine (G) in RNA
Now, applying these rules to the given DNA sequence, we can transcribe it step by step:
DNA: g g t a g c a t g c t a b c c t a c g c c c a u c g g g t a g c mRNA: c c a u c g u a c g a u g g a u g c g g g u a c g
The corresponding mRNA sequence is: ccautcguacgautggautgcgggucg. Note that any non-standard bases (like ‘a’ in ‘abc’) will not be transcribed as typical nucleotides since they do not correspond to regular DNA bases.
Therefore, the resulting mRNA sequence lacks any interpretation for non-standard segments. The clean result from the transcription process reflects only the standard nucleotides found in the DNA, hence the transcribed mRNA is: ccautcguacgautggautgcgggucg.