Campbell Biology in Focus (2nd Edition)
Campbell Biology in Focus (2nd Edition)
2nd Edition
ISBN: 9780321962751
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece
Publisher: PEARSON
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Chapter 13, Problem 4TYU

The elongation of the leading strand during DNA synthesis

  1. A.    progresses away from the replication fork.
  2. B.     occurs in the 3’ → 5’ direction.
  3. C.     produces Okazaki fragments.
  4. D.    depends on the action of DNA polymerase.
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During DNA replication, the leading strand is synthesized continuously, while the lagging strand is synthesized as Okazaki fragments. This is because: O A. DNA polymerases can bind to only one strand at a time. O B. Two different DNA polymerases are involved in replication (DNA polymerase I and II). O C. DNA synthesis can take place only in the 5 -> 3 direction. D. The primers are made of RNA. Reset Selection Previous NEXT Save Exit MacBook Pro Q Search or enter website name & %24 %23 4 3 00 < CO
For the statements below, indicate whether the statement applies to the leading strand, or to the lagging strand, or to both.   a. synthesized in the 5'→3' direction         b.  synthesized continuously       c. require(s) DNA ligase to join fragments       d. described as a daughter strand         e. synthesized in the same direction as the movement of the replication fork         f. DNA polymerase is the enzyme involved in forming this polynucleotide.
Match the enzymes provided from (1-4) in the list of choices with their matching function (A-D) during DNA replication. A. Disrupts hydrogen bonds between DNA bases B. Can only add nucleotides to an existing 3 OH end C. Can't add nucleotides to a chain, but can make covalent bonds D. Actually a specialized form of RNA polymerase select 1. DNA polymerase select 2. Primase select 3. Ligase select v 4. Helicase
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