Bio1334 Genetics - Molecular Genetics - DNA And Chromosomes (Lecture One)

31 Questions | Total Attempts: 168

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Bio1334 Genetics - Molecular Genetics - DNA And Chromosomes (Lecture One)

Quiz on content from Lecture One of Genetics module.


Questions and Answers
  • 1. 
    Name the Scientist that isolated nuclein (now nucleic acid) from human pus.
    • A. 

      Friedrich Miescher

    • B. 

      Rosalind Franklin

    • C. 

      Alfred Hershey

    • D. 

      Francis Crick

  • 2. 
    Which of the following did Rosalind Franklin conclude about the structure of DNA?(Select more than one answer)
    • A. 

      The structure is double-helical

    • B. 

      Phosphate groups lie on the outside of the molecule

    • C. 

      The helix is 20 nanometers in diameter

    • D. 

      DNA has directionality (5' and 3' ends)

    • E. 

      DNA has four nitrogenous bases

  • 3. 
    Name the sugar in DNA.
  • 4. 
    Sugar + base + phosphate(s) = ?
  • 5. 
    Sugar + base = ?
  • 6. 
    Deoxyribose + adenine = ?
  • 7. 
    Deoxyribose + guanine = ?
  • 8. 
    Deoxyribose + cytosine = ?
  • 9. 
    Deoxyribose + thymine = ?
  • 10. 
    5' and 3' ends give DNA molecules directionality.True or False: DNA is synthesised in the 3'-to-5' direction.
    • A. 

      True

    • B. 

      False

  • 11. 
    True or false: In a DNA double-helix, the 5' end of one strand is opposite the 3' end of another strand.
    • A. 

      True

    • B. 

      False

  • 12. 
    Which of the following statements is true?
    • A. 

      Two hydrogen bonds form between adenine and thymine, whereas three form between cytosine and guanine. Bonding is therefore stronger between C and G.

    • B. 

      Two hydrogen bonds form between cytosine and guanine, whereas three form between adenine and thymine. Bonding is therefore stronger between A and T.

    • C. 

      Two hydrogen bonds form between both adenine and thymine, and cytosine and guanine. Bonds between the two bases are equally as strong.

    • D. 

      Three hydrogen bonds form between both adenine and thymine, and cytosine and guanine. Bonds between the two bases are equally as strong.

  • 13. 
    Which of the following statements is correct?
    • A. 

      Adenine and thymine are purines. Cytosine and guanine are pyrimidines.

    • B. 

      Adenine and guanine are purines. Cytosine and thymine are pyrimidines.

    • C. 

      Guanine and cytosine are purines. Adenine and thymine are pyrimidines.

    • D. 

      Cytosine and thymine are purines. Adenine and guanine are pyrimidines.

  • 14. 
    Which of the following images shows a right-handed double helix?
    • A. 

      This one!

    • B. 

      This one!

    • C. 

      Option 3

    • D. 

      Option 4

  • 15. 
    True or false: DNA is a right-handed double helix.
    • A. 

      True

    • B. 

      False

  • 16. 
    Fill in the blank:DNA is a _______ code, because it has four possible bases.
  • 17. 
    Match the following to its complementary strand: 5′-TGGTCGGAATT-3′
    • A. 

      5′-AATTCCGACCA-3′

    • B. 

      5′-ACCAGCCTTAA-3′

    • C. 

      5′-TGGTCGGAATT-3′

    • D. 

      5′-TTAAGGCTGGT-3′

  • 18. 
    Fill in the blank:A ______ is the complete set of genes for an organism.
  • 19. 
    How many base pairs can be found in every human cell?
    • A. 

      6 x 10^9 base pairs

    • B. 

      6 x 10^6 base pairs

    • C. 

      6 x 10^12 base pairs

    • D. 

      6 x 10^3 base pairs

  • 20. 
    What is the name given to the protein that DNA wraps around in order to 'package' the DNA?
  • 21. 
    Which of the following statements is correct?
    • A. 

      DNA wraps twice around 8 histone proteins to form nucleosomes.

    • B. 

      DNA wraps once around 8 histone proteins to form nucleosomes.

    • C. 

      DNA wraps twice around 8 histone proteins to form nucleotides.

    • D. 

      DNA wraps once around 8 histone proteins to form nucleotides.

  • 22. 
    When DNA wraps around the histone protein, what is the name of the structure formed?
  • 23. 
    • A. 

      True

    • B. 

      False

  • 24. 
    Fill in the blank:Histone protein H1 is known as a ______ protein.
  • 25. 
    Fill in the blank:Histone H1 brings the nucleosomes together to form a _________________.
  • 26. 
    Fill in the blank:After chromatin fibre is formed by the Histone H1 protein, chromatin is further condensed by ______________.