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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.

A nucleoside consists of :

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

  a hexose sugar and a nitrogeneous heterocyclic base.

  a pentose sugar and a oxygen base.

  a pentose sugar and a nitrogeneous heterocyclic base.

  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.

The three pyrimidine bases in DNA are :

  Cytosine,Thymine and Uracil

  Adenine, Uracil and Guanine

  Adenine, Thymine and Guanine

  Thymine, Guanine and Cytosine

  Half-n-half Clue
 

4.

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

  4

  3

  5

  2

  Half-n-half Clue
 

5.

The process of protein manufacture within ribosomes using mRNA is called :

  transcription

  protein derivation

  translation

  None of the above

  Half-n-half Clue
 

6.

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

  nucleotides

  nucleosides

  amino acids

  nucleic acids

  Half-n-half Clue
 

7.

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

  In its feathers !

  In the primary spermatocytes.

  In virtually every cell in its body.

  In the ribosomes.

  Half-n-half Clue
 


 
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