Unit 4 Chee 370

37 Questions | Total Attempts: 46

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DNA Quizzes & Trivia

Questions and Answers
  • 1. 
    The mutation rate of DNA replication is about 1 in 10^4 nucleotides 
    • A. 

      True

    • B. 

      False

  • 2. 
    Okazaki fragments are about ________ nucleotides long.
    • A. 

      1000 to 2000

    • B. 

      100 to 200

    • C. 

      10 to 200

    • D. 

      10 to 20

  • 3. 
    What is not a way that RNA polymerase is different from DNA polymerase?
    • A. 

      RNA polymerases don't need primer to start a chain

    • B. 

      RNA polymerases don't have a proofreading mechanism

    • C. 

      RNA polymerase links ribonucleotides

    • D. 

      RNA is not structurally similar, except for the Mg2+ ion at the catalytic site

  • 4. 
    The sigma factor seeks the _______ region on the DNA molecule to tightly bind the polymerase
  • 5. 
    Like DNA helicase, RNA polymerase requires the energy of ATP hydrolysis to open the helix
    • A. 

      True

    • B. 

      False

  • 6. 
    During transcription, bacterial RNA polymerase will continue RNA chain elongation down the strand until it encounter the signal of the _______.
  • 7. 
    The bacterial transcription termination sequence is a long string of ________ pairs, and then an inverted repeat sequence that forms a ________ structure when transcribed into RNA.
    • A. 

      C-G ; hairpin

    • B. 

      C-G ; theta

    • C. 

      A-T ; hairpin

    • D. 

      A-T ; theta

  • 8. 
    A _________ sequence is derived by comparing many sequences with the same basic function and finding the most common nucleotide found at each position
  • 9. 
    TRNAs are about _____ nucleotides long
    • A. 

      10

    • B. 

      20

    • C. 

      40

    • D. 

      80

  • 10. 
    In tRNA, the amino acid binding site is located at the:
    • A. 

      3' end

    • B. 

      5' end

  • 11. 
    Some amino acids may have more than one matching tRNA
    • A. 

      True

    • B. 

      False

  • 12. 
    TRNAs are covalently modified right after they exit the nucleus
    • A. 

      True

    • B. 

      False

  • 13. 
    Eukaryotic tRNAs are synthesized by:
    • A. 

      RNA Polymerase I

    • B. 

      RNA Polymerase II

    • C. 

      RNA Polymerase III

    • D. 

      DNA Polymerase

  • 14. 
    Amino acids are coupled to their tRNA molecules by:
    • A. 

      Aminoacyl-tRNA transferase

    • B. 

      Aminoacyl-tRNA synthetase

    • C. 

      Aminoacyl-tRNA nuclease

    • D. 

      They do not need enzymatic aid to couple

  • 15. 
    A protein is synthesized from its _____ to ____ terminal end
    • A. 

      N ; C

    • B. 

      C ; N

  • 16. 
    Protein synthesis has about 1 mistake in _______ amino acids
    • A. 

      5,000

    • B. 

      10,000

    • C. 

      100,000

    • D. 

      10^9

  • 17. 
    Protein synthesis occurs in the _______
  • 18. 
    Check the things that apply to EUKARYOTIC RNA polymerase
    • A. 

      There is only one

    • B. 

      It needs many proteins called general transcription factors for initiation

    • C. 

      There are three, all are used for transcribing genes/proteins

    • D. 

      It needs one protein (sigma factor) for initiation

    • E. 

      There are three, only one is generally used for transcribing genes/proteins

    • F. 

      Transcription initiation has to deal with packing DNA into nucleosome and chromatin structure

  • 19. 
    The TATA box is a ________ sequence that is recognized by the _________ factor and is located 25 nucleotides ______ from the transcription start site. 
    • A. 

      Promoter ; sigma ; upstream

    • B. 

      Promoter ; TFIID ; upstream

    • C. 

      Promoter ; TFIIB ; downstream

    • D. 

      Terminating ; TFIIB ; upstream

  • 20. 
    The start codon for translation of mRNA is ___
  • 21. 
    The tRNA that carries the start codon is called ________
  • 22. 
    Prokaryotic mRNA uses Shine Dalgarno sequence to initiation translation
    • A. 

      True

    • B. 

      False

  • 23. 
    Which are possible stop codons:
    • A. 

      UAA

    • B. 

      GUA

    • C. 

      UAG

    • D. 

      UGA

  • 24. 
    When polymerase start without a free 3'OH end it is called __ _____, and is not very accurate.
  • 25. 
    The Pribnow box and the 35 sequence are regions in prokaryotic promoters 
    • A. 

      True

    • B. 

      False

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