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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 ?

  T-G-T-C-G-G-C-A-T

  A-C-A-G-C-C-G-T-A

  G-T-G-A-T-T-A-C-G

  U-G-U-C-G-G-C-A-U

  Half-n-half Clue
 

2.

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
 

3.

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

  In virtually every cell in its body.

  In the primary spermatocytes.

  In the ribosomes.

  In its feathers !

  Half-n-half Clue
 

4.

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
 

5.

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

  Varies from person to person.

  1.8 millimeters.

  1.8 meters.

  1.8 centimeters.

  Half-n-half Clue
 

6.

In the DNA Double Helix, complementary base pairs are held together by :

  ionic bonds

  peptide bonds

  N-glycosidic bonds

  hydrogen bonds

  Half-n-half Clue
 

7.

Which base is found in RNA but not DNA ?

  Uracil

  Thymine

  Cytosine

  Adenine

  Half-n-half Clue
 

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