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After playing in the snow, 5-year-old Raul complains, "My feets are cold." Raul's comment shows:
Chargaff's Rules
Empirical rules stating that DNA from any cell of any organisms has a 1:1 ratio of pyrimidine and purine bases (cytosine to guanine and adenine to thymine).
Purines
Nitrogenous bases found in DNA and RNA that include adenine and guanine.
Pyrimidines
One of the two types of nitrogenous bases found in nucleic acids, characterized by a single ring structure, and includes cytosine, thymine (DNA only), and uracil (RNA only).
Semiconservative Replication
The process by which DNA duplicates itself, where each new DNA molecule consists of one old strand and one newly synthesized strand.
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