After two generations of replication in the meselson

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31. After two generations of replication in the Meselson and Stahl experiment, what was the composition of the two bands? A) One band was all 14N and one band was all 15B) One band was all 14N and one band was half 14N and half 15C) One band was all 15N and one band was half 14N and half 15D) One band was all 14N and one band was one quarter 14N and three quarters 15E) One band was all 15N and one band was one quarter 14N and three quarters 15Ans: B
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Section: 33.3
Chapter 33 The Structure of Informational Macromolecules: DNA and RNA 5 32. The process of rehybridizing melted DNA is called:
Section: 33.2 33. Unwinding prior to ligation results in:
Section: 33.3 34. The anticancer drug cisplatin disrupts:
Section: 33.4 35. RNA: A) is oxygenated on the 2ʹஒof ribose. B) can form non-Watson–Crick base pairings. C) uses metals to stabilize folding. D) may form triplet base pairings. E) All of the above. Ans: E
Section: 33.5 Short-Answer Questions 36. Draw two nucleotides in DNA, showing the linkage between the sugars. Ans: OOHOCH2POOOHOCH2POOOBaseBaseOThe 3ʹஒ
Section: 33.1 and Figure 33.4
Chapter 33 The Structure of Informational Macromolecules: DNA and RNA 6 37. What advantage do phosphodiesters have compared to other esters?
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Section: 33.1 38. Describe the DNA helix proposed by Watson and Crick.
Section: 33.1 39. Draw the hydrogen-bonded base pairs of A to T and show why A does not hydrogen bond to C.

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