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Summary Organic Chemistry A Level - DNA

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Detailed and comprehensive notes on DNA for chemistry A level. Covers DNA structure, DNA polymerisation, complementary base pairing, cancer and cisplatin (anti-cancer drug).

Institution
AQA
Module
Unit 3.3.13 - Amino acids, proteins and DNA (74052)








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A/AS Level
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AQA
Subject
A Level Chemistry
Unit
Unit 3.3.13 - Amino acids, proteins and DNA (74052)
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June 12, 2023
Number of pages
4
Written in
2021/2022
Type
Summary

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DNA
DNA
• Deoxyribonucleic acid (DNA) is a polymer made by joining together mononucleotides.
• A nucleotide consists of 3 components:
o A phosphate group.
o A deoxyribose sugar (5-carbon sugar).
o A nitrogen-containing organic base (adenine, guanine, cytosine and thymine).




• A phosphate ion bonds to 2-deoxyribose, which bonds to one of the four bases.




• Adenine and guanine are purine bases (double rings).
• Cysteine and thymine are pyrimidine bases (single rings).

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