What will be the sequence of mRNA produced by the following stretch of DNA?
3' ATGCATGCATGCATG5' Template strand
5' TACGTACGTACGTAC3' Coding strand

see full answer

Start JEE / NEET / Foundation preparation at rupees 99/day !!

21% of IItians & 23% of AIIMS delhi doctors are from Sri Chaitanya institute !!

An Intiative by Sri Chaitanya

5' AUGCAUGCAUGCAUG 3'

3' UACGUACGUACGUAC 5'

3'AUGCAUGCAUGCAUG5'

5'UACGUACGUACGUAC 3'

answer is B.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

The sequence of bases of mRNA is complementary to the sequence of template DNA strand that has 3’ $\to$ 5’
Polarity or the sequence is same as that of coding strand, but instead of thymine, uracil is added in mRNA during transcription.
Hence, if the DNA fragment has the sequence in its two strands as
3’ ATGCATGCATGCATG5’ TEMPLATE STRAND
5’ TACGTACGTACGTAC3’ CODING STRAND, then the sequence of bases in mRNA would be
5’ UACGUACGUACGUAC 3’.
(1) The sequence of mRNA cannot be same as the template strand.
(3) The sequence of mRNA will have the same polarity as the coding strand.
(4) The sequence of mRNA will be complementary to the template strand.

Watch 3-min video & get full concept clarity