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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 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 :

  tRNA

  snRNA

  mRNA

  rRNA

  Half-n-half Clue
 

2.

Because one original strand of the double stranded DNA helix is found in each daughter cell (after cell division), the DNA replication process is :

  derivative

  semiconservative

  dispersive

  conservative

  Half-n-half Clue
 

3.

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

  transcription

  protein derivation

  translation

  None of the above

  Half-n-half Clue
 

4.

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
 

5.

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
 

6.

Each nucleotide in a DNA molecule consists of :

  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 hexose sugar and a nitrogeneous heterocyclic base.

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

  Half-n-half Clue
 

7.

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 centimeters.

  1.8 meters.

  Half-n-half Clue
 


 
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