Which of the following best explains why DHA replication procesds in 55 to 3^(') direction? A. The hydrogen bonding is directional Only b' nucleotides can form phosphodiester bonds C. DNA polymerase requires a free 3^(') OH to add nucleodides D. The leading strand is always longer than the lagging strand
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Which of the following best explains why DNA replication proceeds in a 5' to 3' direction? A. The hydrogen bonding is directional B. Only 5' nucleotides can form phosphodiester bonds C. DNA polymerase requires a free 3' OH to add nucleotides D. The leading strand Show more…
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A new DNA strand elongates only in the 5' to 3' direction because A.) DNA polymerase begins adding nucleotides at the 5' end of the template. B.) replication must progress toward the replication fork. C.) DNA polymerase can only add nucleotides to the free 3' end D.) Okazaki fragments prevent elongation in the 3' to 5' direction E.) the polarity of the DNA molecule prevents addition of nucleotides at the 3' end.
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33. Which of the following is the best reason why a new DNA strand only elongates in the 5' to 3' direction? A. DNA polymerase begins adding nucleotides at the 5' end. B. Replication must progress toward the replication fork. C. Okazaki fragments prevent elongation in the 3 to 5 direction. D. DNA polymerase adds nucleotides only to the free 3' end. The polarity of the DNA molecule prevents addition of nucleotides at the 3' end. All of these mechanisms ensure that DNA replication is accurate EXCEPT: A. Complementary base pairing. B. Excision repair. C. Mismatch repair. D. RNA polymerase proofreading. All of these are correct mechanisms that ensure DNA replication.
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What is the basis for the difference in how the leading and lagging strands of DNA molecules are synthesized? (A) The origins of replication occur only at the $5^{\prime}$ 'end. (B) Helicases and single-strand binding proteins work at the 5 ' end. (C) DNA polymerase can join new nucleotides only to the 3 'end of a pre-existing strand, and the strands are antiparallel. (D) DNA ligase works only in the $3^{\prime} \rightarrow 5^{\prime}$ direction.
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