How would the following base sequence be coded for in mrna cag tgc acg?

Answer 1

Recall for any DNA sequence, there are actually two sequences because DNA is a double helix composed of two strands. By convention (a thankfully logical convention) we typically record the DNA sequence of the "sense strand" from the 5' end to the 3' end. The sense strand was chosen because the sense DNA sequence is exactly the same as the mRNA sequence except that it has T's where RNA has U's.

Thus if the sequence you provided is the sense strand 5'-acagtgc-3', then the mRNA sequence would be 5'-acagugc-3'.

However, if what you were asking for is what mRNA sequence would be transcribed from the given DNA sequence, that would depend if you'd given me the sequence 5' to 3' or 3' to 5'. If you've given me the sequence of the antisense strand, 3' to 5' (that is, if you're asking what would happen if an RNA polymerase landed at the left of the sequence and began moving right) the mRNA sequence would be ugucacg. If you've given me the sequence of the antisense strand 5' to 3', then the answer would be gcacugu.

I'm sorry if I made this more complicated for you.... I have a feeling you were looking for a simpler answer than this.

Answer 2

if you gave me the dna sequence in the question this would be easier to answer

Answer 3

CGACGAGTGTAGGGCAA

Answer 4

T A C G G G A C A T A G