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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

Your Performance  

1.

A DNA strand has the sequence A-C-A-G-C-C-G-T-A. What would be its complementary strand ?

  U-G-U-C-G-G-C-A-U

  A-C-A-G-C-C-G-T-A

  T-G-T-C-G-G-C-A-T

  G-T-G-A-T-T-A-C-G

  Half-n-half Clue
 

2.

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

  1.8 millimeters.

  1.8 centimeters.

  1.8 meters.

  Varies from person to person.

  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 :

  semiconservative

  derivative

  conservative

  dispersive

  Half-n-half Clue
 

4.

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
 

5.

A significant difference between prokaryotes and eukaryotes is :

  Prokaryotes do not have DNA as their genetic material while eukaryotes do.

  Prokaryote cells are not membrane-bound while eukaryote cells are.

  The DNA of prokaryotes floats freely around the cell while the DNA of eukaryotes is held within its nucleus.

  Prokaryotes do not have ribosomes while eukaryotes do.

  Half-n-half Clue
 

6.

The unit within the nucleus that contains a protein complex (located at the center of the unit) of two H2A, H2B, H3 and H4 histone proteins with DNA wrapped around the complex in two turns, each turn consisting of about 80 base pairs is called a :

  centrosome

  ribosome

  nucleosome

  histosome

  Half-n-half Clue
 

7.

The DNA molecules of different species differ in their :

  phosphate backbone

  sequence of bases

  type of nucleotides

  All of the above

  Half-n-half Clue
 


 
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