DNA Study Guide For A Test

17 Questions | Total Attempts: 113

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DNA Quizzes & Trivia

DNA in Biology study for a test


Questions and Answers
  • 1. 
    _________________________ - Copying DNA in a cell
    • A. 

      BNA Replication

    • B. 

      RNA Replication

    • C. 

      DNA Replication

  • 2. 
    The ______________ nitrogen bases found in DNA nucleotides are _______________(a), _______________(G), _____________ (C), and _______________(T).
  • 3. 
    A DNA nucleotide has three parts: a ____________ called ___________, a _____________groupwhich consists of P and O atoms), and a ________________________.
  • 4. 
    A and G called _____________ (two rings of carbon).
    • A. 

      Pyrimidines

    • B. 

      Purines

    • C. 

      Helicases

  • 5. 
    C and T are called _________________ (one ring of carbon). 
    • A. 

      Pyrimidines

    • B. 

      Purines

    • C. 

      Helicases

  • 6. 
    In 1953, James ____________ and Francis _________ suggested a model for the structure of DNA that looked like a spiral staircase: ______________.
    • A. 

      James, Zone, zero

    • B. 

      Madision, Drock, single

    • C. 

      Winslow, Crock, Triple

    • D. 

      Watson, Crick, Doublex Helix

  • 7. 
    Two nucleotide chains separate by unwinding; each chain serves as a template for a new nucleotide chain.Nuceotides are held together wih a _____________backbone.
    • A. 

      Replication Fork

    • B. 

      Sugar-phosphate

    • C. 

      Hydogen bond

  • 8. 
    Two chains separate at the ______________ by enzymes (_____________).
  • 9. 
    As the helicase enzymes move along the DNA molecule, they break _______________between the bases, and the chains separate.
  • 10. 
    Enzymes________________ bind to the separated chains of DNA; one nucleotide s time, it constructs a new complementary chain of nucleotides.* Product._______________________________________________________
  • 11. 
    Suppose that the sequence of nucleotides in one chain of the original DNA molecule is A-T-T-C-C- G. DNA polymerases would produce a new nucleotide chain with the sequence of ____________________.
  • 12. 
    The process of DNA replication occurs with one error in every 10,000 paired nucleotides. A change in the nucleotide sequence at even one location, (_____________), may have serious effects on new cells.
  • 13. 
    Sickle Cell Anemia: caused by a __________________ that substitutes adenine for thymine; results in defective hemoglobin/sickle shaped red blood cells (RBCs)
  • 14. 
    _____________________ is the loss of a chromosome segment.ABCDEF --------------> ABEFG     CD     (lost)
    • A. 

      Duplication and deletion

    • B. 

      Deletion

    • C. 

      Inversion

    • D. 

      Reciprocal transiocation

  • 15. 
    __________________________ result when homologous chromosomes break at different points..                                       and swap segmentsABCDEFG           ABEFG               ----------->ABCDEFG           ABCDODEFG
    • A. 

      Deletion

    • B. 

      Reciprocal transiocation

    • C. 

      Inversion

    • D. 

      Duplication and deletion

  • 16. 
    _______________________ results when nonhomologous chromosomes exchange segments.ABCDEFG           ABEDCFG               ---------->HIJKLMNO           HIJKCDEFG
    • A. 

      Duplication and deletion

    • B. 

      Inversion

    • C. 

      Reciprocal transiocation

    • D. 

      Deletion

  • 17. 
    __________________ results when a broken segment is inserted in reverse order.            -----                             _-----       ABCDEFG    ----------->  ABEDCFG
    • A. 

      Inversion

    • B. 

      Deletion

    • C. 

      Reciprocal transiocation

    • D. 

      Duplication and deletion

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