What was Chargaff's contribution to solving the DNA puzzle?

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Multiple Choice

What was Chargaff's contribution to solving the DNA puzzle?

Explanation:
Chargaff showed that in DNA the amount of adenine equals thymine and the amount of cytosine equals guanine. This consistent pairing across species suggested that bases come in complementary pairs on the two strands of the molecule, hinting at a mechanism where one strand determines the other. That insight helped lead to the idea of a double helix with A pairing with T and G pairing with C. So describing the bases as A equals T and C equals G best captures Chargaff's key contribution.

Chargaff showed that in DNA the amount of adenine equals thymine and the amount of cytosine equals guanine. This consistent pairing across species suggested that bases come in complementary pairs on the two strands of the molecule, hinting at a mechanism where one strand determines the other. That insight helped lead to the idea of a double helix with A pairing with T and G pairing with C. So describing the bases as A equals T and C equals G best captures Chargaff's key contribution.

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