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Dangerously Thin: A Case Study on the Genetic Code

Quiz by ANJUM HASAN

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8 questions
Show answers
  • Q1

    Which of the following correctly describes the featuresof the genetic code?

    It is degenerate, universal, and nonoverlapping

    It is degenerate, organism specific, and nonoverlapping.

    It is universal, on- specific, and repeating.

    It is universal, organism specific, and nonrepeating.

    30s
  • Q2

    The genetic code is considered universal; what does this mean?

        The sequence of bases in all organisms is the same.

       Each codon codes for the same amino acid in nearly all organisms

    .     Each codon corresponds to a unique amino acid.

         An amino acid can be specified by more than one codon.

    30s
  • Q3

    A student reads the following sequence of mRNAbases: UACGAGAACCGA. They divide it up into the following codons: UACG AGAACCGA. What is wrong with this sequence of codons?

       Codons should be 3 bases long.

    The codons overlap

       Codons should be read as DNA bases.

    There is nothing wrong; this sequence is correct.

    30s
  • Q4

    The amino acid alanine can be coded for by the codons GCU, GCC, GCA, or GCG. What feature of the genetic code is this  of?

        It is degenerate.

       It is universal.

    It is specific for each organism

      It is nonoverlapping.

    30s
  • Q5

    A sequence of DNA is transcribed into an RNA sequence. This RNA sequence reads 5′3′-UACGAGAACCGA-.Use the codon wheel provided to determine the sequence of amino acids.

    Question Image

    Tyr, Glu, Asn, Arg

    His, Glu, Thr, Arg

    Tyr, Asp, Gln, Pro

    Stop, Asp, Lys, Pro

    30s
  • Q6

    Consider the following DNA sequence  found on a different portion of  the coding strand of Henry’s CYP2C9 gene: TTACCGAGA.     

     What would be the sequence of the template strand on this portion of the gene?

    UUACCGUGA

    TTACCAGA

    AGAGCCATT

    AATGGCTCT

    30s
  • Q7

    Howmany triplet codes does the  DNA sequence in Q6  contain?

    4

    2

    6

    3

    30s
  • Q8

    What would be the sequence of the mRNA after the  sequence on Henry's gene is  transcribed?

    AAUGGCUCU

    TTACCGAGA

    TTTGGGTUCU

    AAACCGAGA

    30s

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