Question

One strand of a section of DNA is isolated from E Coli reads:

5'-GTAGCCTACCCATAGG-3'
Suppose that an mRNA in transcribed from DNA using this complimentary strand as a template. What will the sequence of mRNA in this region?
a)5'-GTAGCCTACCCATAGG
n)3'-GTAGCCTACCCATAGG
c)5'- GUAGCCUACCCAUAGG
d)3'- GUACCUACCCAUAGG

Answer 1

The correct mRNA sequence transcribed from the given DNA strand 5'-GTAGCCTACCCATAGG-3' is 5'-CAUCGG AUGGGUAUCC-3'. The bases pair according to the rules of base pairing, where adenine pairs with uracil, and cytosine pairs with guanine in RNA.

Step-by-step explanation:

If one strand of a section of DNA from E. coli is 5'-GTAGCCTACCCATAGG-3', and an mRNA is transcribed from this DNA using this complementary strand as a template, the sequence of the mRNA in this region will be complementary to the DNA template. During transcription, adenine (A) pairs with uracil (U) in RNA, and cytosine (C) pairs with guanine (G), while guanine (G) pairs with cytosine (C) and thymine (T) pairs with adenine (A). Therefore, the complementary mRNA sequence would be 5'-CAUCGG AUGGGUAUCC-3', with thymine replaced by uracil.

The correct answer to this question is c) 5'-CAUCGG AUGGGUAUCC-3'.