IT's Time For An Organic Chemistry Quiz

20 Questions | Total Attempts: 11

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Do you know what is the difference between DNA and RNA? What is prokaryotic protein synthesis? Check out our online quiz and test your organic chemistry knowledge with some well-researched questions.


Questions and Answers
  • 1. 
    List four differences between DNA and RNA
  • 2. 
    Using examples, explain the two main mechanisms of regulation of gene expression in prokaryotes
  • 3. 
    State the six key points at which eukaryotic gene expression is regulated, and briefly describe mechanisms of how each is regulated. 
  • 4. 
    Protein processing is crucial in gene expression. List and describe some of the key mechanisms used in protein processing.
  • 5. 
    Using examples, briefly explain how ubiquitination can be involved in both degradative control of cellular processes and non-degradative control of cellular processes.
  • 6. 
    Select the CORRECT statement
    • A. 

      Purines are 2x ring and 6 membered 

    • B. 

      Purines are adenosine and cytosine

    • C. 

      Pyrimidines are cytosine and thymine 

    • D. 

      Purines are adenosine and guanine

  • 7. 
    In nucleotides, the sugar and base bind at the sugar's [Blank] site and in the sugar- phosphate bond occurs at the sugar's 5' site
  • 8. 
    A nucleoside is a sugar group and base, while a nucleotide is a sugar, base and [Blank]
  • 9. 
    Select all the TRUE statements
    • A. 

      The nucleosome is made out of a histone octamer core with DNA wrapped around it

    • B. 

      Chromatin refers to the nucleosome string when it is two nucleosomes thick

    • C. 

      Heterochromatin is condensed chromatin and is constituitive but not facultative

    • D. 

      Euchromatin is loosely condensed chromatin, is mostly non-repetitive DNA and can decondense and condense

    • E. 

      A strand of DNA has multiple replication origins

    • F. 

      Non-coding DNA comprises ~97% of the human genome and includes regulatory sequences, introns and repetitive DNA

  • 10. 
    Select the INCORRECT statement
    • A. 

      Repetitive DNA is made up of two categories: highly repetitive and moderately repetitive DNA

    • B. 

      Highly repetitive DNA is made up of telomeres, minisatellite DNA, microsatellite DNA and pseudogenes

    • C. 

      Moderately reptitive DNA is made up of tandem gene families, pseudogenes and transposon derived repeats 

    • D. 

      Transposons may be either DNA transposons or retrotransposons 

  • 11. 
    True or false: Prokaryotic protein synthesis is not compartmentalised
    • A. 

      True

    • B. 

      False

  • 12. 
    According to the Wobble Base hypothesis, one amino acid can bind to multiple tRNAs 
    • A. 

      True

    • B. 

      False

  • 13. 
    After mRNA processing what must occur before translation?
    • A. 

      Splicing

    • B. 

      Reading of the Shine-Dalgarno sequence

    • C. 

      TRNA Aminoacylation 

    • D. 

      Anticodon-codon binding

  • 14. 
    TRNA aminoacylation requires
    • A. 

      TRNA Aminoacylase

    • B. 

      TRNA Aminosynthetase 

    • C. 

      Aminoacyl tRNA synthase

    • D. 

      Aminoacylsynthase

    • E. 

      Aminoacyl tRNA synthetase

  • 15. 
    Ubiquitin must be added to a protein's [Blank]
  • 16. 
    Select the CORRECT statement
    • A. 

      When iron is present, aconitase protects the stem loop at transferrin receptor mRNA's 3' end, allowing transcription

    • B. 

      When iron is present, aconitase is removed from the stem loop at transferrin receptor mRNAs 5' end allowing transcription

    • C. 

      When iron is present, aconitase protects the stem loop at the ferritin mRNA's 3' end allowing transcription

    • D. 

      When iron is present, aconitase is removed from the stem loop at ferriten mRNA's 5' end, allowing transcription

  • 17. 
    Methylation of DNA is higher in 
    • A. 

      Euchromatin 

    • B. 

      Heterochromatin 

    • C. 

      It's equal in both

    • D. 

      Methylation only occurs in protein processing

  • 18. 
    Constituitive splicing of the Bcl-X gene will determine if it is pro-apoptotic Bcl-XL or anti-apoptotic Bcl-XS
    • A. 

      True

    • B. 

      False

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