25. Which of the f 5. Which of the following was an important piece of evidence

Question

25. Which of the f 5. Which of the following was an important piece of evidence in Watson and Crick's search for the structure of DNA? a. Chargaff's rules b. X-ray crystallography by Rosalind Franklin c. Chemical evidence for the structure of Name 30. Fre TH a. b, c. d. nucleotides d. Use of molecular models and knowledge of hydrogen bonding properties All of the above 31. T e. 26. In the Meselson-S tahl experiment, which of the following obsenvations uled out the dispersive model of DNA replication? a. No completely "heavy' DNA is observed after the first round of replication. b. No completely "light DNA ever appears, even after several replications c. The product that accumulates after two rounds of 32 replication is completely "heavy. d. Completely "heavy" DNA is observed throughout the experiment. e. Both light and intermediate DNA densities are observed after a single round of replication. 27. Lagging strand DNA replication Polymerizes 3'5' a. b. Does not use DNA Polymerase III c. Constantly replaces DNA Polymerase and Primase d. Uses DNA Polymerase I and Ligase only once e, spends too much time partying all night. 28. Which of the following enzymes acts on both the leading and lagging strands during DNA replication, and also is important in DNA excision repair? a. DNA Polymerase b. DNA Polymerase I c. Helicase d. RNA Primase e. Harry Potter Nimbus 2000 proteins! 29, DNA Polymerase is a(n) a. Anabolic enzyme b, 5'-93, synthesizer of DNA c. 3' 5' exonuclease of DNA Highly processive and self-checking enzyme All of the above d. e.

Explanation / Answer

25. X ray crystallography

26. No complementary heavy DNA is observed after the first round of replication

27 Constantly replaces DNA polymerase ans primase

28. DNA polymerase I

29. All of the above

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