Question

Choose the correct set of base pairings in DNA and RNA.

• A. In DNA; A-G, T-C
  In RNA; A-G, T-C
• B. In DNA; A-C, T-G
  In RNA; A-G, T-C
• C. In DNA; A-T, G-C
  In RNA; A-U, G-C
• D. In DNA; A-T, G-C
  In RNA; A-T, G-U

Answer 1

The correct option is C

In DNA; A-T, G-C
In RNA; A-U, G-C

The purines present in DNA and RNA are Adenine and Guanine. But the pyrimidine that bonds with Adenine is different in DNA and RNA. In DNA it is thymine, whereas in RNA it is Uracil. However, the pyrimidine that binds Guanine is Cytosine in both DNA and RNA.