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DNA Replication


This quiz is based on the process of DNA replication in both Prokaryotes and Eukaryotes.

Formats Info Page Worksheet / Test Paper Quiz Review
Multiple choice

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1.

An enzyme (used by all retroviruses) that transcribes genetic information of the virus from RNA into DNA, is :

  Reverse transcriptase

  RNA polymerase

  Restriction nuclease

  Methylase

  Half-n-half Clue
 

2.

An enzyme that recognizes and cuts DNA only at a particular sequence of nucleotides is often called :

  Restriction endonuclease

  RNA polymerase

  Photolyase

  DNA glycosylase

  Half-n-half Clue
 

3.

The enzyme that accomplishes the unwinding of the original double stranded DNA molecule, once supercoiling has been eliminated, by breaking the hydrogen bonds that hold the two strands together is :

  Topoisomerase

  Helicase

  DNA Polymerase II

  Primase

  Half-n-half Clue
 

4.

What does transformation involve in Bacteria ?

  the creation of a strand of DNA from RNA

  the creation of a strand of RNA from DNA

  assimilation of external DNA into a cell

  the infection of cells by a phage DNA molecule

  Half-n-half Clue
 

5.

Because DNA polymerase III can only act from 5' to 3', continuous strand growth can be achieved only along one of the template strands (Leading strand) and strand growth along the other strand must occur discontinuously resulting in the production of a series of short sections of new DNA called :

  Replicon fragments

  Okazaki fragments

  Klenow fragments

  None of the above

  Half-n-half Clue
 

6.

DNA Polymerase III is actually an aggregate of several different protein subunits. So it is often called a :

  Holoenzyme

  Primeosome

  replisome

  None of the above

  Half-n-half Clue
 

7.

A mamalian cell typically has 1.2 meters (when completely outstretched) of double stranded DNA.The total time to duplicate the DNA is 5 hours. How many origins of replication are there if the rate of duplication is 16µmeters/min ?

  250

  15000

  1

  500

  Half-n-half Clue
 


 
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