Question

-2. - A region of coding strand of DNA has the following nucleotide sequence 5' - ATGCGGC - 3' The sequence of bases on mRNA transcribed by this would be: (A) 5' - AUGCGGC - 3 (B) 3' - AUGCGGC -3' (C) 5'- TACGCCG - 3' (B) 3' - TACGCCG - 5' ​

Answer 1

Answer:

The answer is (A) 5'-AUGCGGC-3'

Explanation:

The coding strand is non template strand which runs in 5'-3' direction and it has not transcribed to mRNA . template strand or non coding strand which runs in 3'-5' direction is transcribed to mRNA in 5'-3' direction. The mRNA has same nucleotide sequence as coding strand but the Thymine (T) nucleotide is replaced by Uracil(U) in mRNA .

Coding strand :- 5'- ATGCGGC -3'

mRNA transcribed from non coding strand :- 5'- AUGCGGC- 3'

Non coding strand: 3'- TACGCCG-5'