Which of the following pairing of nucleotide bases is present in double helix DNA?
Show Hint
- Thymine - Cytosine
- Adenine - Thymine
- Cytosine - Adenine
- Uracil - Thymine
The Correct Option is B
Solution and Explanation
- Adenine (A) pairs with Thymine (T) by two hydrogen bonds.
- Cytosine (C) pairs with Guanine (G) by three hydrogen bonds.
Thus, the correct pairing is Adenine - Thymine. Other pairings such as Thymine - Cytosine and Cytosine - Adenine are not correct in the context of DNA base pairing. Final Answer: \[ \boxed{\text{Adenine - Thymine}}. \]
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