Quiz 18 Nucleic Acids

Karen Timberlake

Answer the questions below and then click "submit" to send your answers.

  1. The nucleotide containing guanine, phosphate, and deoxyribose is

    2. Your answer:
    G
    dGMP
    dG
    GMP

  2. The nitrogen-containing bases in RNA are

    3. Your answer:
    A, G, T
    A, G, C, U
    A, G, C, T
    A, G, U

  3. Thymine is found

    4. Your answer:
    in RNA, but not DNA
    in both DNA and RNA
    in DNA, but not RNA
    in neither DNA nor RNA

  4. A DNA molecule contains 44% cytosine. The percentage of guanine in the same molecule is

    5. Your answer:
    44%
    56%
    28%
    100%

  5. The complementary base sequence in the second strand of DNA for the base sequence CCGATT would be

    6. Your answer:
    AATCGG
    GGCTAA
    GGCUAA
    CCGATT

  6. A RNA molecule differs from a DNA molcule because

    7. Your answer:
    RNA is a single strand of nucleotides.
    RNA contains uracil.
    RNA contains ribose.
    All of the above

  7. The mRNA in the cell

    8. Your answer:
    carries the genetic code from DNA to the ribosomes
    carries amino acids to the ribosome for protein systhesis
    combines with protein to form the ribosomes
    is the smallest of the RNAs

  8. What is the amino acid for the codons GUA-UGC-AAA?

    9. Your answer:
    Val-Cys-Lys
    et-Cys-Phe
    Ala-Arg-Lys
    Val-Ser-Arg

  9. An anticodon

    10. Your answer:
    is a sequence of three nucleotides on a tRNA
    complements a mRNA codon for amino acids
    is different for each of the amino acids
    All of the above.

  10. What amino acid would be carried by the tRNA with anticodon ACG?

    11. Your answer:
    cysteine
    threonine
    arginine
    tryptophan

  11. Recombinant DNA

    12. Your answer:
    contains a section of foreign DNA.
    is made from molecules of DNA called plasmids
    can make many copies of the foreign DNA.
    All of the above.

  12. When a mutation occurs

    13. Your answer:
    a change occurs in the base sequence of DNA.
    a change occurs in the sequence of amino acids in protein synthesis.
    a genetic disease may result.
    all of the above.

  13. In the operon model, control of protein synthesis is at the level of

    14. Your answer:
    translation
    translocation
    replication
    transcription

  14. In the enzyme induction model of regulation of protein systhesis,

    15. Your answer:
    a substrate induces the synthesis of the enzymes for its utilization in the cell.
    an end product turns off the synthesis of the enzymes needed for its use in the cell.
    the mRNA that is produced cannot attached to the ribosome.
    an active repressor turns off the operator.

  15. Viruses

    16. Your answer:
    contain DNA or RNA.
    needs a live host cell in order to reproduce.
    use viral RNA to construct DNA in a reverse transcription process.
    All of the above.

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