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Question

If the sequence of the coding strand in a transcription unit is written as follows
5'-TGAACTGTAGCATGC-3'.
Find out the correct sequence of the m-RNA transcribed from it.

A
5'-UGAACUGUAGCAUGC-3'
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B
3'-CGUACGAUGACAAGU-5'
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C
3'-CGUACGAUGUCAAGU-5'
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D
5'-UGACUGUAGCUUGC-3'
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Solution

The correct option is A 5'-UGAACUGUAGCAUGC-3'
If the coding strand in a transcription unit is 5'-TGAACTGTAGCATGC-3'.
Then, it is known that the sequence of mRNA is same as the coding strand of DNA. However, in RNA, thymine is replaced by uracil.
Hence, the sequence of mRNA will be 5'-UGAACUGUAGCAUGC-3'.

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