The DNA strand acting as a template for RNA has the base sequence AGCTTCGA. What will be the corresponding base sequence in mRNA?

TCGAAGCT

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UGCUAGCT

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TCGAUCGU

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UCGAAGCU

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Solution

The correct option is D UCGAAGCU
While base pairing, adenine (A) always pairs with thymine (T) in the case of DNA while it pairs with uracil (U) in case of RNA. On the other hand, guanine always pairs with cytosine whether DNA or RNA.
In the given sequence of DNA; which works as the template strand for coding mRNA, 3'-AGCTTCGA-5'. So, the RNA sequence comes to be 5'-UCGAAGCU3'.
Thus, the correct option is 'UCGAAGCU'.

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