Question

You have a piece of DNA that includes the following sequence

5'-ATAGGCATTCGATCCGGATAGCAT-3'
3'-TATCCGTAAGCTAGGCCTATCGTA-5'
Which of the following RNA molecules could be transcribed from this piece of DNA?

A) 5'-UAUCCGUAAGCUAGGCCUAUGCUA-3'

B) 5'-AUAGGCAUUCGAUCCGGAUAGCAU-3'

C) 5'-UACGAUAGGCCUAGCUUACGGAUA-3'

D) None of the above

Answer 1

The correct RNA molecule that could be transcribed from the given DNA sequence is 5'-UAUCCGUAAGCUAGGCCUAUGCUA-3', corresponding to option A.

Step-by-step explanation:

When transcribing DNA to RNA, the RNA molecule is synthesized using the template strand of DNA. DNA has the bases adenine (A), thymine (T), cytosine (C), and guanine (G), whereas RNA has adenine (A), uracil (U), cytosine (C), and guanine (G) in place of thymine.

The RNA strand is complementary to the DNA template strand, meaning A pairs with U and C pairs with G. In the given DNA sequence, 5'-ATAGGCATTCGATCCGGATAGCAT-3', the RNA transcription would be 5'-UAUCCGUAAGCUAGGCCUAUGCUA-3', matching option A. This is because in RNA, adenine (A) pairs with uracil (U) instead of thymine (T), and cytosine (C) with guanine (G).