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marta [7]
3 years ago
10

What did Chargaff discover while studying bases in the DNA of organisms?

Biology
1 answer:
mixer [17]3 years ago
4 0

Answer:

The ratios of thymine and adenine were similar, as were the ratios of guanine and cytosine.

Explanation:

Chargaff's Rule:

  • Erwin Chargaff, an Austrian chemist investigated the amount of the four nitrogenous bases in a sample of DNA.
  • Chargaff observed that the purines and pyrimidines existed in a 1:1 ratio. The concentration of thymine was equal to that of adenine. Moreover, the concentration of cytosine was equal to that of guanine.
  • On the basis of the ratios, Chargaff proposed that, in DNA, adenine (A) always pairs with thymine (T) and cytosine (C) always pairs with guanine (G).
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