a. unwinds the DNA helix b. stabilizes and stops the two strands from annealing (rebinding with each other) c. recoils the DNA d. cleaves both strands of DNA to relieve tension at supercoils e. places RNA primers at their proper location on the template strands f. acts as starting points for DNA polymerase g. adds DNA nucleotides to form new DNA strands h. forms phosphodiester bonds to join Okazaki fragments 1. single-strand binding protein 2. helicase 3. DNA ligase 4. RNA primer 5. gyrase 6. DNA polymerase 53°F Cloudy Q Search

a. unwinds the DNA helix b. stabilizes and stops the two strands from annealing (rebinding with each other) c. recoils the DNA d. cleaves both strands of DNA to relieve tension at supercoils e. places RNA primers at their proper location on the template strands f. acts as starting points for DNA polymerase g. adds DNA nucleotides to form new DNA strands h. forms phosphodiester bonds to join Okazaki fragments 1. single-strand binding protein 2. helicase 3. DNA ligase 4. RNA primer 5. gyrase 6. DNA polymerase 53°F Cloudy Q Search

Biology Today and Tomorrow without Physiology (MindTap Course List)

5th Edition

ISBN:9781305117396

Author:Cecie Starr, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Christine Evers, Lisa Starr

Chapter6: Dna Structure And Function

Section: Chapter Questions

Problem 11SQ: Energy that drives the attachment of a nucleotide to the end of a growing strand of DNA comes from...

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Energy that drives the attachment of a nucleotide to the end of a growing strand of DNA comes from ______. a. phosphate-group transfers from ATP b. DNA polymerase c. the nucleotide itself d. a and c
The initial mechanism for repairing nucleotide errors in DNA is _____. a. mismatch repair b. DNA polymerase proofreading c. nucleotide excision repair d. thymine dimers
DNA replication requires ________ . a. DNA polymerase c. primers b. nucleotides d. all are required
DNA polymerase I functions in DNA replication to: O a. synthesize the RNA primer O b. O C. bind to single-stranded DNA and prevent it from reannealing O d. removes the RNA primers and fill in the gaps synthesize the leading and lagging strands synthesize the leading strand, but not the lagging strand e.
Match the substance to it's function. v Prevents supercoiling/Overwinding of the DNA A. Nucleosomes v Unwinds and separates the double stranded DNA B. Toposiomerase v Adds a short piece of complementary RNA nucleotides C. Ribosome v Copies DNA and adds complimentary DNA nucleotides D. Nuclease v Prevents DNA strands from connecting E. RNA polymerase v Links together short segments of DNA F. Helicase v Found only in the lagging strand G. DNA Polymerase v What chromosomes are made of H. DNA and Proteins v The proteins found in chromosomes I. Codon v DNA wrapped around proteins J. Okazaki Fragments Responsible for making mRNA K. Anticodon v The site of translation L. DNA Ligase M. Histones v Cuts DNA for mutation repair N. Primase v A triplet of nucleotides on MRNA O. Single Strand Binding Proteins v A triplet of nucleotides on tRNA
X DNA gyrase helps replication by O O O O reducing the stress caused by the unwinding DNA. breaking the H bonds between complementary base pairs. combining nucleotides to the exposed strand providing energy to the helicase enzyme. preventing newly unwound DNA strands from hydrogen bonding.
The function of DNA gyrase in replication is to open the duplex. stabilize DNA strands. synthesize RNA nucleotides. O reduce strain in the DNA.
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
Which of the following is part of the elongation step of DNA synthesis?a. pulling apart the two DNA strandsb. attaching complementary nucleotides to the template strandc. untwisting the DNA helixd. none of the above
Match these replication associated terms with the appropriate definition or function. L Separates DNA strands to expand the replication bubble. Uses template strand to synthesize complete RNA transcripts. II. DNA polymerase . Cleaves the bond between two adjacent nucleotides in a strand. III. Primase DNA consensus sequence at the 5' end of a gene where synthesis begins. IV. Ligase DNA sequence where replication will be initiated. V. V. Synthesizes leading and lagging strands. Helicase VIL Synthesizes RNA primers to initiate strand synthesis. origin VIL Covalently links the DNA backbones of Okazaki fragments.
Rank from the first to the last steps in DNA synthesis. Reset H DNA polymerase DNA strands separate as the enzyme helicase unwinds them DNA polymerase catalyzes the covalent addition of free nuclectides to the growing new DNA strands The enzyme primase builds ANA primers on the existing DNA strands Two identical doutle helices First Last
DNA polymerase is the enzyme that synthesizes new DNA during DNA replication. DNA polymerase occasionally makes mistakes and adds the incorrect nucleotide. How is this mistake usually resolved? O The incorrect base pair is removed by non-homologous end-joining O The incorrect base pair is removed by nucleases O The incorrect base is usually left where it is to enhance genetic variation O The incorrect base is removed by the proofreading activity of DNA polymerase