DNA And RNA

12 Questions | Total Attempts: 3659

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DNA And RNA

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Questions and Answers
  • 1. 
    What is one way that RNA differs from DNA?
    • A. 

      RNA is a longer mollecule.

    • B. 

      RNA contains a different kind of sugar.

    • C. 

      RNA occurs only in the nucleus.

    • D. 

      DNA contains only 3 nitrogenous bases.

  • 2. 
    Which one of the following is NOT a common characteristic of both RNA and DNA?
    • A. 

      They are both nucleic acids.

    • B. 

      Both contain C-G base pair sequences.

    • C. 

      Both contain A-T base pair sequences.

    • D. 

      Both can be found in the nucleus.

  • 3. 
    How many base pair sequences does it take to make a codon for an amino acid?
    • A. 

      Two

    • B. 

      Three

    • C. 

      Four

    • D. 

      Five

  • 4. 
    A DNA base sequence is A-T-T-C-C-G. What would be the corresponding mRNA base sequence?
    • A. 

      U-A-A-G-G-C

    • B. 

      T-A-A-G-G-C

    • C. 

      A-T-T-C-C-G

    • D. 

      U-T-T-C-C-G

  • 5. 
    Proteins are polypeptides made of a long chain of ...
    • A. 

      Carbon molecules

    • B. 

      Base pairs

    • C. 

      Nucleotides

    • D. 

      Amino acids

  • 6. 
    When one DNA makes a copy of itself in the nucleus, it is called ...
    • A. 

      Transcription

    • B. 

      Translation

    • C. 

      Replication

    • D. 

      Transconfiguration

  • 7. 
    Which type of RNA carries amino acids to the ribosomes?
    • A. 

      RRNA

    • B. 

      MRNA

    • C. 

      TRNA

    • D. 

      Ordinary RNA

  • 8. 
    A DNA nuceotide sequence that is 99 base pairs in length would code for how many amino acids?
    • A. 

      33

    • B. 

      22

    • C. 

      99

    • D. 

      3

  • 9. 
    What kind of mutation results in the substitution of one amino acid for another?
    • A. 

      Frame shift

    • B. 

      Chromosomal

    • C. 

      Point

    • D. 

      Deletion

  • 10. 
    Tobacco, UV radiation, asbestos, and X-rays can all alter the DNA structure and are examples of what?
    • A. 

      Mutagens

    • B. 

      Mutations

    • C. 

      Nucleotides

    • D. 

      Anticodons

  • 11. 
    Although most mutations are harmful, sometimes a beneficial mutation occurs that helps an organism do what?
    • A. 

      Increase its amount of DNA

    • B. 

      Live longer, happier lives

    • C. 

      Be better adapted to its environment

    • D. 

      Grow faster

  • 12. 
    Protein synthesis involves which two processes in which order?
    • A. 

      Transcription - replication

    • B. 

      Translation - transcription

    • C. 

      Transcription - translation

    • D. 

      Replication - translation