if DNA sequence is GATTCGAATCGATTAG, what is the mRNA sequence?

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When mRNA transcribes DNA, it follows base pairing rules as follows:

If DNA contains Thymine, the mRNA complement is Adenine. If DNA contains Adenine, the mRNA complement is Uracil. This is because RNA doesn't have the base thymine as found in DNA. If DNA contains cytosine, the mRNA complement is...

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When mRNA transcribes DNA, it follows base pairing rules as follows:

If DNA contains Thymine, the mRNA complement is Adenine. If DNA contains Adenine, the mRNA complement is Uracil. This is because RNA doesn't have the base thymine as found in DNA. If DNA contains cytosine, the mRNA complement is guanine. Finally, if DNA contains the base guanine, the mRNA complement is cytosine.

With those rules in mind, if the original DNA template is:

             GATTCGAATCGATTAG

the mRNA template is:        C U A A G C  U U A G C U A A U C

Remember follow the base pairing rules when you need to show the mRNA transcript, produced from the DNA blueprint.

 

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