The American biochemist Erwin Chargaff discovered that DNA is the primary constituent of the gene, thereby helping to create a new approach to the study of the Biology of heredity.
Chargaff's rule states that in DNA, the amount of adenine equals the amount of thymine, and the amount of cytosine equals the amount of guanine. This principle helped Watson and Crick determine the structure of DNA as a double helix.
Those are Chargraff's Rules. You're wrong to think that adenine and thymine are the only pairs however because in RNA, adenine always pairs with uracil. Thymine is not in RNA. Adenine and Guanine are purines. Cytosine, thymine, and uracil are purimidines. Sources: My Science class and textbook Hope this helped!
The American biochemist Erwin Chargaff discovered that DNA is the primary constituent of the gene, thereby helping to create a new approach to the study of the biology of heredity.
Chargaff's rule states that in DNA, the amount of adenine equals the amount of thymine, and the amount of cytosine equals the amount of guanine. This principle helped Watson and Crick determine the structure of DNA as a double helix.
Chargaff discovered that in DNA, there is a 1:1 ratio of adenine and thymine, and a 1:1 ratio of guanine and cytosine. This led to the rule that adenine always pairs with thymine and guanine always pairs with cytosine.
Those are Chargraff's Rules. You're wrong to think that adenine and thymine are the only pairs however because in RNA, adenine always pairs with uracil. Thymine is not in RNA. Adenine and Guanine are purines. Cytosine, thymine, and uracil are purimidines. Sources: My Science class and textbook Hope this helped!