A short mRNA sequence is shown in the box below. Determine the DNA sequence from which this mRNA sequence was transcribed. The first three are TAC, complete the remainder.

Answer: The remainder of the DNA sequence is AGA-CTA-ACC-ATG
Explanation: RNA is synthesized from a DNA molecule. The synthesized RNA molecule is not identical with the DNA strand in base sequence from which it is synthesized rather they are complementary to the other. This means that in base pairing, wherever thymine is found on the DNA strand, adenine occurs in the mRNA strand, wherever adenine occurs in the DNA strand, Uracil occurs in the mRNA strand while wherever guanine occurs in the DNA strand, cytosine is found in the mRNA strand.