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Describe the structure of DNA - AQA - A-Level Biology - Question 10 - 2021 - Paper 1
Question 10
Describe the structure of DNA. - DNA is a polymer of nucleotides. - Each nucleotide is composed of three parts: a deoxyribose sugar, a phosphate group, and a nitrog... show full transcript
Worked Solution & Example Answer:Describe the structure of DNA - AQA - A-Level Biology - Question 10 - 2021 - Paper 1
Step 1
Describe the structure of DNA
Answer
DNA is a polymer composed of nucleotides, which have three components: a deoxyribose sugar, a phosphate group, and a nitrogenous base. The nucleotides are connected via phosphodiester bonds, forming a backbone. The DNA structure is a double helix, held together by hydrogen bonds between specific base pairs: adenine pairs with thymine, and cytosine pairs with guanine.