Question

If the sequence of bases in DNA is ATTCGATG, then the sequence of bases in the transcript will be :

• A. \( \text{CAUCGAAU} \)
• B. \( \text{UAAGCUAC} \)
• C. \( \text{AUUCGAUG} \)
• D. \( \text{GUAGCUA} \)

Hint:

Remember that in RNA, Uracil (U) replaces Thymine (T) as the base that pairs with Adenine (A). Always transcribe the DNA sequence by replacing T with U and using the complementary base pairing rules.

Answer 1

The Correct Option is B

During transcription, the DNA sequence is used as a template to synthesize a complementary RNA sequence. The rules for base pairing are: \begin{itemize} \item Adenine (A) in DNA pairs with Uracil (U) in RNA. \item Thymine (T) in DNA pairs with Adenine (A) in RNA. \item Cytosine (C) in DNA pairs with Guanine (G) in RNA. \item Guanine (G) in DNA pairs with Cytosine (C) in RNA. \end{itemize} The given DNA sequence is ATTCGATG. Following the base pairing rules, the corresponding RNA sequence will be: \begin{itemize} \item A in DNA $\rightarrow$ U in RNA \item T in DNA $\rightarrow$ A in RNA \item T in DNA $\rightarrow$ A in RNA \item C in DNA $\rightarrow$ G in RNA \item G in DNA $\rightarrow$ C in RNA \item A in DNA $\rightarrow$ U in RNA \item T in DNA $\rightarrow$ A in RNA \item G in DNA $\rightarrow$ C in RNA \end{itemize} So, the RNA transcript sequence is UAAGCUAC.