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Structure and chemical composition of DNA


This quiz is based on the physical structure and chemical composition of DNA. It deals with basic concepts related to DNA chemistry and DNA methods.
 

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Multiple choice

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1.

The difference between DNA and RNA is :

  The RNA sugar phosphate backbone contains ribose rather than deoxyribose.

  DNA molecules are double stranded while RNA molecules are single stranded for the most part.

  Thymine in DNA is replaced by Uracil in RNA.

  All of the above.

  Half-n-half Clue
 

2.

The number of hydrogen bonds that hold the Adenine - Thymine base pair together is :

  2

  3

  5

  4

  Half-n-half Clue
 

3.

Because one original strand of the double stranded DNA helix is found in each daughter cell (after cell division), the DNA replication process is :

  dispersive

  derivative

  semiconservative

  conservative

  Half-n-half Clue
 

4.

Where would you expect to find genetic information describing the characteristics of a Dodo ?

  In virtually every cell in its body.

  In its feathers !

  In the ribosomes.

  In the primary spermatocytes.

  Half-n-half Clue
 

5.

The single stranded molecule that is transcribed from a DNA template (i.e a photocopy of a specific section of the DNA molecule) and is subsequently used to manufacture proteins is :

  snRNA

  tRNA

  mRNA

  rRNA

  Half-n-half Clue
 

6.

The technique Rosalind Franklin used to determine the structure of DNA was :

  centrifuge analysis

  X-Ray crystallography

  bacteriophages

  None of the above

  Half-n-half Clue
 

7.

The DNA molecule is a polymer. Its monomer units are :

  nucleotides

  nucleosides

  nucleic acids

  amino acids

  Half-n-half Clue
 


 
5 more pages in Molecular Biology


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