Shown below is an 80 basepair segment of a hypothetical gene. It includes part o

Question

Shown below is an 80 basepair segment of a hypothetical gene. It includes part of the promoter and the first nucleotides of the gene. The sequences of both strands of the DNA are shown: the top strand reads 5 to 3 left to right (1 to 80), the botton complementary strand reads 5 to 3 right to left (80 to 1) Synthesis of the mRNA starts at the boxed A/T basepair indicated by the (a) below (nucleotide #11) Ind proceeds left to right on the sequence below. Given this information, what vould be the sequence of the first 10 nucleotides of the resulting mRNA? (Hint: You need to first determine which strand of the DNA is the template strand!) O 5. AATTGTGAAT 3' O 5 AAUUGUGAAU 3 O 5' UUAACACUUA 3 O 5 AUUCACAAUU 3 QUESTION 5 Click Save and Submil to save and submit. Click Save All Answers to save ali Close Window Save All Answers

Explanation / Answer

The synthesis of m-RNA strand always proceeds in 5'-3' direction. So its complimentary strand should be in opposite direction. Here, the transcription proceeds in left to right direction or we can say 5' end is in left side and 3' end is towards right side. So, the complimentary DNA strand is the lower one, one which has its 3' end on left side and 5' end on right. First 10 nucleotides of DNA is TTAACACTTA so the complimentary mRNA strand will hace AAUUGUGAAU.

So the third option is correct.

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