Question

The base pairs of DNA double helix are qiven below. Select thesuitable mRNA strand that derived from transcription is 3'-ATTTCC-5'
5'-TAAAGG-3
(a)UAAAGG
(b)cuuucc
(c)GAAAGG
(d) ccuuuc​

Answer 1

Answer:

UAAAGG 3'Read more on Sarthaks.com - https://www.sarthaks.com/1333972/pairs-double-helix-given-below-select-suitable-strand-derived-transcription-att

Answer 2

Given: Base DNA sequence as 3' - ATTTCC -5'

                                                    5' - TAAAGG - 3'

To find: Complementary mRNA sequence of given base.

Solution:

• Transcription is the process by which information from a base DNA sequence is converted to mRNA using polymerases.
• In this question the following two principles will be followed:

1. Transcription follows the rule of complementary base pairing and uses the non-coding strand as base( 3' - 5').
2. In RNA Adenine(A) pairs with Uracil(U) instead of thymine (T).

• Now let's look at the base sequence given. We only need to look at the first line of sequence as mRNA is transcribed in 5'-3' direction.
• Starting from 3'- we have:

1. A which will pair with U
2. 3 Ts which will pair with 3 As
3. 2 Cs which will pair with 2 Gs

• Using these pairings we get our final answer as :

              5'- UAAAGG -3'

Hence the final answer is option (a) 5'- UAAAGG -3'