Which base forms a complementary pair with Guanine?

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Multiple Choice

Which base forms a complementary pair with Guanine?

Explanation:
In DNA, bases pair specifically so the double helix maintains a consistent width. Guanine forms hydrogen bonds with Cytosine, creating a complementary G–C pair that fits because G is a purine and C is a pyrimidine, and they can establish three hydrogen bonds. The other bases pair with different partners: Thymine pairs with Adenine, Uracil pairs with Adenine in RNA, and Adenine pairs with Thymine or Uracil depending on the molecule. So Cytosine is the base that pairs with Guanine.

In DNA, bases pair specifically so the double helix maintains a consistent width. Guanine forms hydrogen bonds with Cytosine, creating a complementary G–C pair that fits because G is a purine and C is a pyrimidine, and they can establish three hydrogen bonds. The other bases pair with different partners: Thymine pairs with Adenine, Uracil pairs with Adenine in RNA, and Adenine pairs with Thymine or Uracil depending on the molecule. So Cytosine is the base that pairs with Guanine.

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