During mRNA transcription, a DNA strand has the bases CTAGGT. What is the complementary strand of mRNA?
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a
GAUCCA
b
GATCCA
c
TCGAAC
d
AGCTTG
During mRNA transcription, the DNA template strand is read by the RNA polymerase enzyme, which constructs the complementary mRNA strand using RNA nucleotide bases. The pairing rules differ slightly from DNA replication; adenine (A) pairs with uracil (U) in RNA (instead of thymine, T, as in DNA), and cytosine (C) pairs with guanine (G).
Given the DNA strand with the bases CTAGGT, the complementary mRNA strand is:
C - G
T - A (in RNA, A pairs with U)
A - U
G - C
G - C
T - A (again, A pairs with U)
Therefore, the complementary mRNA strand is: GACCAU
However, since the options provided don't match the correct sequence, it's possible that there may have been a typo in the question or answer choices. If you meant for the original DNA strand to be read in the opposite direction (typical for coding sequences), the strand would be read as TGGATC, and the corresponding mRNA would be ACCUAG, but this is not an option in your list either. Please verify the DNA sequence and the available choices to obtain the correct mRNA sequence based on the context provided.