Data about ratios of different bases present in DNA molecules was provided by:
Correct answer: B. Erwin Chargaff
- A. Maurice Wilkins
- B. Erwin Chargaff
- C. Watson and Crick
- D. Rosalind Franklin
Explanation
Erwin Chargaff was instrumental in uncovering the ratios of nucleotide bases in DNA, leading to Chargaff's rules: the amount of adenine equals thymine and the amount of guanine equals cytosine. This finding was crucial for Watson and Crick's model of the DNA double helix. The other options, although important to the discovery of DNA structure, did not contribute directly to the understanding of base ratios. Maurice Wilkins and Rosalind Franklin provided insights into DNA's physical structure, and Watson and Crick conceptualized the double helix model, relying on Chargaff's biochemical findings.
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