Structure of DNA 0.0 / 5 ? BiologyDNA, genetics and evolutionASAQA Created by: m0rrallCreated on: 20-03-13 20:06 What are the three basic components of a nucleotide? A deoxyribose sugar, a phosphate group and an organic base 1 of 8 Mononucleotides are continuously linked by condensation reactions to form what? Polynucleotides 2 of 8 What are the two types of organic base structure and how do they differ? Double-ring structure (adenine and guanine) have longer molecules than single ring structures (cytosine and thymine 3 of 8 How many hydrogen bonds are formed between each base pair? A and T bases link with two hydrogen bonds, while G and C link with three 4 of 8 How is DNA adapted to passing from generation to generation without change? DNA is a very stable molecule 5 of 8 How do the two strands in a DNA molecule separate so easily? Strands are joined only by weak hydrogen bonds 6 of 8 How is DNA adapted to carry large amounts of genetic information? DNA is a very large molecule 7 of 8 What is the main advantage of the deoxyribose-phosphate backbone? Genetic information is protected from corruption by the environment 8 of 8
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