study questions 4 - relative concentration of each...

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Study questions 4 If a strand of DNA contains only purines, the complementary strand 1. Will not contain the following bases: (list) 2. Will have a molecular weight (heavier, lighter, same weight), because (explain) Consider the phosphate containing backbone of DNA 3. The ionizing properties of the backbone make it (acidic, neutral, basic, hydrophilic, hydrophobic) 4. A protein that has the following property would be more likely to bind and stick to DNA: (acidic, neutral, basic, hydrophilic, hydrophobic) 5. Consider the difference between ice and water. Which one has more intact H-bonds? 6. Using water as a model, predict the simplest physical treatment that would cause the two strands of dsDNA to separate. 7. Suppose that you have two types of DNA. One, called S, is single stranded and does not dis- play any internal pairing. The other one, called D, is double stranded. You have a simple ma- chine that can measure the concentration of each nucleotide very accurately. You can use the
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Unformatted text preview: relative concentration of each nucleotide to determine which sample is S and which is D. Explain. 8. Why did Miller and Urey not add O2 to their mix? Explain. 9. Why did Miller and Urey use electrical sparking in their apparatus? 10. What is the significance of lipids in the context of the hypothetical formation of primitive cells? 11. What was the next conceptual step left for demonstration after the Miller Urey experiment? 12. What do the following molecule pairs share? proteins-nucleic acids; polysaccharides-nucleic acids; lipids-nucleic acids. 13. If two polypeptides that were complexed with each other are separated, which structural or-der is disrupted? (primary, secondary, tertiary, quaternary). 14. Formation of a alpha helix can involve the following polypeptide numbers (1, 2, 3, 4) 15. Formation of a beta-sheet can involve the following polypeptide numbers (1, 2, 3, 4) BIS2A, Comai Spring 09...
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