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DNA Replication


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

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Multiple choice

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1.

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
 

2.

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
 

3.

The enzyme that stitches Okazaki fragments together (along the lagging strand) is called :

  Holoenzyme

  DNA Ligase

  DNA Polymerase II

  Topoisomerase

  Half-n-half Clue
 

4.

The enzyme that creates a short RNA oligonucleotide at initiation sites where replication is to be carried out is called :

  Primase

  DNA Ligase

  DNA Gyrase

  Exonuclease

  Half-n-half Clue
 

5.

The enzyme (made of proteins and RNA) that elongates chromosomes by adding TTAGGG sequences to the end of existing chromosomes is :

  Telomerase

  Exonuclease

  Endonuclease

  Amylase

  Half-n-half Clue
 

6.

The enzyme X removes RNA primers attached by Primase and this gap is then filled in by DNA Polymerase I. The enzyme X is :

  RNase H

  DNA amylase

  DNA ligase

  Reverse Transcriptase

  Half-n-half Clue
 

7.

In 1940, Nobel Laureate Barbara McClintock discovered sequences of DNA that can move around to different positions within the genome of a single cell and cause mutations. These sequences (first observed in maize) are called :

  Transposons

  inverted repeats

  direct repeats

  sticky ends

  Half-n-half Clue
 


 
5 more pages in Molecular Biology


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