Cytosine (C)

Definition

Cytosine is another one of the four nitrogenous bases found in both DNA and RNA molecules. In both cases, it pairs with guanine (G).

Consider cytosine as a puzzle piece. It can only fit perfectly with its corresponding piece - guanine.

Guanine (G): The nitrogenous base that pairs with cytosine in both DNA and RNA.

Pyrimidines: A type of nitrogenous base that includes cytosine, thymine, and uracil. They are single-ringed structures.

Purines: A type of nitrogenous base that includes adenine and guanine. They are double-ringed structures.

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