What enzyme replaces RNA primer on the leading strand with DNA? - ProProfs Discuss
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What enzyme replaces RNA primer on the leading strand with DNA?



A. Polymerase III
B. Ligase
C. Polymerase I
D. Helicase

This question is part of DNA Replication
Asked by Wyatt Williams, Last updated: Jul 03, 2020

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3 Answers

Christian Jackson

Christian Jackson, Content Developer, Austin

Answered Sep 20, 2018

A primase is a type of lagging strand template which means that it will not be able to do its replacement properly. A polymerase I, on the other hand, will have the ability to extend so that the RNA segments will be removed. This means that the right answer is C. It will then extend to fill the gaps wherein the RNA fragments are removed.

This can form the needed fragments. This is when the RNA primers will be removed and they will be replaced by DNA. The DNA ligase will be in charge of connecting the various fragments of the DNA. Polymerase III will be used before Polymerase I.

 

John Adney

John Adney

Answered Mar 08, 2017

Isn't this the RNA primase? My notes show the polymerase I proofreads and it does say excises errors and primers.
 

John Smith

John Smith

Answered Nov 14, 2016

Polymerase I
 

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