Which step of DNA replication occurs BEFORE DNA polymerase extends the new strand of DNA? - a lagging strand is synthesized -proofreading enzymes check the DNA -an RNA primer is synthesized -the RNA primers are replaced with DNA nucleotides

Which step of DNA replication occurs BEFORE DNA polymerase extends the new strand of DNA? - a lagging strand is synthesized -proofreading enzymes check the DNA -an RNA primer is synthesized -the RNA primers are replaced with DNA nucleotides

Name: Which step of DNA replication occurs BEFORE DNA polymerase extends the
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Description: Which step of DNA replication occurs BEFORE DNA polymerase extends the new strand of DNA? - a lagging strand is synthesized -proofreading enzymes check the DNA-an RNA primer is synthesized-the RNA primers are replaced with DNA nucleotides

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 9SQ

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Watch this video (http://openstaxcollege.org/l/DNArep) to learn about DNA replication. DNA replication proceeds simultaneously at several sites on the same molecule. What separates the base pair at the start of DNA replication?
Energy that drives the attachment of a nucleotide to the end of a growing strand of DNA comes from ________. a. the nucleotide b. DNA polymerase c. phosphate-group transfers from ATP
DNA replication requires ________ . a. DNA polymerase c. primers b. nucleotides d. all are required
Cloning Genes Is a Multistep Process Which enzyme is responsible for covalently linking DNA strands together? a. DNA polymerase b. DNA ligase c. EcoRl d. restriction enzymes e. RNA polymerase
Which of the following replication proteins is incorrectly paired with it’s function? DNA polymerase - adds nucleotides to the growing strand Single stranded binding proteins - hold the DNA strands apart while they are being replicated Ligase - enhances separation of DNA strands Topoisomerase - relieves torsional stress due to unwinding by the DNA Primase - synthesizes a short RNA sequence to initiate replication
Why is an RNA primer necessary for DNA replication? The RNA primer is necessary for the activity of DNA ligase. The RNA primer creates the 5â and 3â ends of the strand. DNA polymerase can only add nucleotides to RNA molecules. DNA polymerase can only add nucleotides to an existing strand.
The synthesis of new DNA requires energy. Where does this needed energy come from? The DNA polymerase reading the old DNA strand. The triphosphate nucleotide that is being added to the new DNA strand. The carbohydrates that the bacteria cell eats. The breaking of the hydrogen bonds between the opposite DNA strands.
DNA replication is called semi-conservative because ___ (all, all or none) of the two new strands of DNA is old DNA from the original DNA molecule and ___ (all, all or none) is new DNA.
DNA polymerase replicates DNA producing a _______ strand.
Which best describes DNA polymerase? Group of answer choices an enzyme that removes the sugar molecule from a nucleotide so that the phosphate groups can be linked together an enzyme involved in DNA replication that binds to DNA and facilitates the formation of a new strand of DNA an enzyme that allows the chromosomes to coil around proteins so that the chromosomes can fit into the nucleus an enzyme that deletes specific regions of DNA an enzyme that breaks DNA down into fragments
Fill in the blanks in the paragraph about DNA replication. There are many _____________ involved in DNA replication. _____________ unwinds the DNA strand while _____________ breaks the hydrogen bonds between bases. _____________ lays down an RNA primer that lets ________________ know where to begin adding new nucleotides. The _______________ is made continously, while the _________________ is made in fragments called __________________. These fragments are glued together by ______________.
Number the steps of DNA replication in the correct order (1, 2, 3) a) ______ Polymerase travels down the DNA parent strand b)______ DNA strands are unzipped c) ______ Ligase binds Okazaki fragments together