Answer:
Albrecht Kossel’s contribution to the discovery of the structure of DNA was his work on nucleic acids
Explanation:
In particular, Albrecht Kossel identified and isolated the five primary nucleobases found in DNA: adenine, cytosine, guanine, thymine, and uracil. This laid the foundation for understanding the chemical composition and structure of DNA, which was crucial for subsequent research leading to the elucidation of its double helix structure by James Watson and Francis Crick.