Glossary 3.3


The glossary provides definitions and explanations of key terms and concepts essential to understand the topic in the lesson. Be sure to familiarize yourself with each term before attempting the lesson glossary quiz.

Browse the glossary using this index

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D

DNA Ligase

an enzyme that catalyzes the formation of a phosphodiester bond between two DNA strands, as well as between Okazaki fragments


DNA Polymerase I

a prokaryotic replication enzyme that fills in gaps in the lagging strand between Okazaki fragments; also proofreads the final strands


DNA Polymerase II

a prokaryotic replication enzyme that repairs damage to DNA, including damage that occurs between replication events


DNA Polymerase III

a prokaryotic replication enzyme that builds new DNA strands from nucleotides


H

Helicase

a replication enzyme that separates and unwinds the DNA strands


L

Lagging Strand

the DNA strand that is copied in the direction away from the replication fork


Leading Strand

the DNA strand that is copied in the direction toward the replicaton fork


N

Nucleoside Triphosphate

a building block and energy source for replicating DNA


O

Okazaki Fragment

the piece of new DNA on the lagging strand


R

Replication Bubble

the separating of DNA in both directions during replication



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