part 2

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wiener123
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part 2
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2014-12-09 15:05:08
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  1. 1) The classic experiment that demonstrated that
    radioactively labeled viral DNA transforms bacterial cells was performed by

    a. Griffith

    b. Avery, MacLeod, and McCarty

    c. Kossel and Levene

    d. Hershey and Chase

    e. Watson and Crick
    D
  2. ) Which of the following describes the flow of genetic
    information as stated in the central dogma of molecular biology?

    a. RNAàproteinàDNA

    b. RNAàDNAàprotein

    c. proteinàRNAàDNA

    d. DNAàRNAàprotein

    e. proteinàDNAàRNA
    D
  3. The DNA “backbone” is composed of

    a. an amide bond between deoxyribose and a nitrogenous base

    b. a glycosidic bond between deoxyribose and a nitrogenous
    base

    c. a phosphodiester
    bond between the 3’- and 5’- hydroxyl groups of adjacent deoxyribose residues

    d. a phosphodiester bond between the 2’- and 5’- hydroxyl
    groups of adjacent deoxyribose residues

    e. none of the above
    C
  4. Nucleosomes are composed of all of the following except
    ________.
    H5
  5. There are approximately _________ human genes.

    a. 10,000

    b. 20,000

    c. 100,000

    d. 1,000,000

    e. 10,000,000
    B
  6. )______ are gene sequences that code for a gene product.

    a. introns

    b. exons

    c. nucleosomes

    d. cruciforms

    e. snurps
    B
  7. A genome is
    complete DNA base sequence in an organism.
  8. Protein synthesis is called:
    Translation
  9. The entire set of proteins synthesized by a cell is called
    Proteome
  10. The polyamines assist in the compression of eukaryotic chromosome
    structure because they
    • possess positive
    • charges that interact with negative charges of DNA (overcome them)
  11. ) In nucleosome structure the histone ________ aids in
    stabilizing the wrapping of DNA around the protein octomer.
    H1
  12. Chromatin contains several levels of structure which include

    a. nucleosomes

    b. 200 nm filaments

    c. 30 nm fiber

    d. both B and C are correct

    e. all of the above
    are correct
    E
  13. D loops and variable loops
    are found in _______
    tRNA
  14. Which of the following are involved in the splicing of RNA
    molecules?

    a. snurps

    b. snRNA

    c. rRNA

    d. both a and b are
    correct

    e. all of the above are correct
    D
  15. ) The DNA strand that acts as a template during
    transcription is referred to as the ______ strand.

    a. sense

    b. antisense

    c. transcribed

    d. all of the above are correct

    e. none of the above are correct
    B
  16. Determine the mRNA sequence for the following DNA sequence.

    5’-GCCATTTCCCGTTA-3’
  17. Which of the following does not contribute to the
    noncovalent interactions that stabilize the helical strands of DNA
    phosphodiester bonds
  18. During a transition mutation which of the following bases
    would be substituted for cytosine?
    Thymine
  19. HIV infection of a susceptible cell is initiated when the
    gp120 envelope protein binds the _______ antigen
    CD4

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