Question

If the sequence of nitrogen bases of the coding strand in a transcription unit is 5\(\prime\)–ATGAATG–3\(\prime\), the sequence of bases in its RNA transcript would be:

• A. 5\(\prime\)–AUGAAUG–3\(\prime\)
• B. 5\(\prime\)–UACUUAC–3\(\prime\)
• C. 5\(\prime\)–CAUUCAU–3\(\prime\)
• D. 5\(\prime\)–GUAAGUA–3\(\prime\)

Hint:

During transcription, RNA is synthesized using the DNA template strand, but its sequence matches the coding strand with uracil substituted for thymine.

Answer 1

The Correct Option is A

The RNA transcript is complementary to the template strand of DNA and identical to the coding strand (except uracil replaces thymine). \[ \text{Coding strand: } 5\(\prime\)–ATGAATG–3\(\prime\) \text{RNA transcript: } 5\(\prime\)–AUGAAUG–3\(\prime\) \]