If the coding sequence on the DNA is AATIGCT, the sequence in the mRNA will be:
Correct answer: B. UUAACGA
- A. AAUOCGT
- B. UUAACGA
- C. TTAACGA
- D. UUTTCGT
Explanation
RNA polymerase uses one of the DNA strands (the template strand) as a template to make a new, complementary RNA molecule. The base sequence complementary to AATTGCT is UUAACGA as Adenine in DNA pairs with Uracil in mRNA , Thymine in DNA pairs with Adenine in mRNA, and Guanine pairs with Cytosine.
This question appeared on the ETEA MDCAT 2014 paper, which you can sit online with every answer explained.
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About Ribonucleic Acid (RNA)
Ribonucleic acid is generally a single-stranded nucleic acid containing ribose and uracil instead of thymine. Coverage includes mRNA, tRNA and rRNA, complementary base pairing, transcription and translation, and the differences between RNA and DNA in structure, location and biological function.
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