Question

If the base sequence of a segment of dna is 3 atg cac 5 then the base sequence of mrna transcriptase will be

Answer 1

Answer:

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