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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.

Which base is found in RNA but not DNA ?

  Uracil

  Thymine

  Cytosine

  Adenine

  Half-n-half Clue
 

2.

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 oxygen base.

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

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

  Half-n-half Clue
 

3.

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

  nucleosides

  nucleotides

  nucleic acids

  amino acids

  Half-n-half Clue
 

4.

How does the sequence of a strand of DNA correspond to the amino acid sequence of a protein ? This concept is explained by the central dogma of molecular biology which states that :

  DNA is replicated and sections of the replica are used to make protein.

  DNA is used to make RNA which is used to make protein.

  protein is manufactured directly from DNA without any intermediate.

  None of the above.

  Half-n-half Clue
 

5.

A nucleoside consists of :

  a hexose sugar and a nitrogeneous heterocyclic base.

  a pentose sugar and a nitrogeneous heterocyclic base.

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

  a pentose sugar and a oxygen base.

  Half-n-half Clue
 

6.

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

  In virtually every cell in its body.

  In the ribosomes.

  In its feathers !

  In the primary spermatocytes.

  Half-n-half Clue
 

7.

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

  5

  3

  2

  4

  Half-n-half Clue
 


 
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