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Biology Chapter 13 Review

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  • Which enzyme unzips the DNA strand?
    Helicase
  • DNA polymerase can only lay down base pairs in a ______________________ direction.
    5' - 3' direction
  • Draw the basic structure of a single nucleotide (i.e. you need to include the 3 parts of a nucleotide).
    Drawing Needs to have a sugar, phosphate group, nitrogenous base
  • Using complete sentences, describe the overall process of DNA replication. Be sure to include information about what it is, when it occurs, the main steps, the enzymes involved, etc.
    DNA is copied in S phase to ensure Cells can have correct DNA after Cell Division. Initiat. (Helicase), Elong. (Primase & DNA Polym.),Terminat. (Nuclease ligase
  • Describe Chargaff’s Rule and how it relates to DNA.
    Chargaff’s Rule states that because of complementary base pairing, the number of complementary base pairs will be equal
  • In DNA, Adenine always pairs with ___________________.
    Thymine
    Uracil
    Cytosine
    Guanie
  • Which enzyme proof-reads the DNA strand and removes the RNA primers?
    nuclease
  • Describe what is meant by complementary base pairing.
    complementary base pairing; A pairs with T & vice versa, and G pairs with C and vice versa
  • DNA replication occurs ___________________________.
    in the s phase of interphase
  • Which of the following is NOT an example of a pyrimidine?
    Thymine
    Uracil
    Adenine
    Cytosine
  • In DNA, Guanine always pairs with ___________________.
    Cytosine
  • What does the term “semi-conservatively” mean? How does it related to DNA replication?
    each strand of the original double helix serves as a template for the new DNA strand being replicated during DNA replication.
  • Which enzyme seals up the DNA strands?
    Ligase
  • Which of the following best describes the leading strand in DNA replication?
    the leading strand is replicated in chunks called Okazaki fr
    the leading strand is replicated continuously
    none of these
    the leading strand is replicated discontinuously
  • _________________ is the sugar that’s found in _____________.
    Deoxyribose, RNA
    Deoxyribose, DNA
    Ribose, DNA
  • Which of the following scientists helped contribute important information relating to DNA?
    All of these
    Watson & Crick
    Franklin
    Wilkins
  • Which enzyme adds DNA base pairs to the new DNA strand?
    DNA Polymerase
  • Which of the following is NOT one of the parts of a nucleotide?
    nitrogenous base
    sugar
    phosphate group
    none of these
  • What is the correct order of the steps of DNA Replication?
    Initiation, elongation, termination
  • Which enzyme add RNA primers to the DNA strand
    Primase