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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 three pyrimidine bases in DNA are :

  Cytosine,Thymine and Uracil

  Adenine, Thymine and Guanine

  Adenine, Uracil and Guanine

  Thymine, Guanine and Cytosine

  Half-n-half Clue
 

2.

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

  amino acids

  nucleotides

  nucleosides

  nucleic acids

  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

  semiconservative

  derivative

  conservative

  Half-n-half Clue
 

4.

The total length of a DNA molecule in the human genome when fully outstretched is approximately :

  1.8 centimeters.

  1.8 meters.

  1.8 millimeters.

  Varies from person to person.

  Half-n-half Clue
 

5.

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
 

6.

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 :

  rRNA

  snRNA

  tRNA

  mRNA

  Half-n-half Clue
 

7.

Each nucleotide in a DNA molecule consists of :

  a phosphate group, a hexose sugar and a nitrogeneous heterocyclic base.

  a phosphate group,a pentose sugar and a nitrogeneous heterocyclic base.

  a phosphate group, a pentose sugar, and a oxygen base.

  a sulfonyl group, a pentose sugar, and a nitrogeneous heterocyclic base.

  Half-n-half Clue
 


 
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