Mahmoud Torkamani
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DNA Structure, Nucleotides, and Base Pairing | As & A Level Chemistry 9701 PowerPoint
This PowerPoint presentation provides an in-depth exploration of DNA, focusing on its structure and the chemical interactions that define its function. It begins with the basic components of DNA—nucleotides, which consist of a phosphate group, 2-deoxyribose, and one of four bases (adenine, cytosine, guanine, or thymine). The slides explain how nucleotides form polynucleotide chains through covalent bonds and delve into the discovery of DNA by Watson and Crick. The presentation also covers the role of hydrogen bonding in base pairing, emphasizing why adenine pairs with thymine and cytosine with guanine. With interactive tasks and exam-style questions, this resource is ideal for students and educators in biochemistry and genetics, offering a clear understanding of DNA′s molecular structure and its significance in biology.