Question

If the base sequence in dna is atcg the mrna sequence is

Answer 1

UAGGCUAA

Explanation:

First, think about which base pairs arise in complementary strands of DNA:

DNA → DNA

adenine → thymine (A → T)

thymine → adenine (T → A)

cytosine → guanine (C → G)

guanine → cytosine (G → C)

However, mRNA does not consist of the same four bases as DNA. While DNA has the ATCG nitrogenous bases, RNA replaces thymine with uracil, making its bases AUCG.

So, that means that whenever DNA has adenine, instead of pairing this with thymine, RNA will use uracil instead.

DNA → RNA

adenine → uracil (A → U)

thymine → adenine (T → A)

cytosine → guanine (C → G)

guanine → cytosine (G → C)

Giving us the corresponding sequence:

UAGGCUAA