Question

Which of the following would be the correct complimentary DNA sequence for the following: 5'-TATATGGCGATATAGGG-3'

A)3'-ATATACCGCTATATCCC-5

B) 5'-ATATACCGCTATATCCC-3'

C) 3'-AUAUACCGCUAUAUCCC-5

Answer 1

As the given sequence of DNA runs in 5'-3' direction, its complementary sequence that has to be found will run in 3'-5' direction with bases complimentary to it. It means A will be pairing with T; and C will be pairing with G and vice versa.

As the given sequence of DNA is-

5'-TATATGGCGATATAGGG-3

Its complementary sequence will be-

3'-ATATACCGCTATATCCC-5

You can see its running from 3'-5' and has complementary base pairing.

Hence, the correct option is (A)

About the incorrect options-

(B) Here, the direction is wrong.

(C) DNA does not contain U, it is present in RNA

Hope it helps

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