DNA Replication Flashcards Preview

X Bio 1610 Exam 3 > DNA Replication > Flashcards

Flashcards in DNA Replication Deck (15):
1

DNA replication

Each strand acts as a template

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Bidirectional Replication

Replication forks move in opposite directions

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Origins of Replication

In eukaryotes Replication begins at many different sites

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Nothing happens

On its own; many proteins and enzymes

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Antiparallel

One moves up; the other down

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Unidirectional orientation

New nucleotides can only be added to the 3' end

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Polymerase

Enzymes that synthesize DNA

Can only extend in the 5-3 direction

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Primers

Required to begin synthesis

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Primase

Creates primers as a type of RNA polymerase

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Binding Protein

Binds strands back together

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Topisomase

Uncoils/flattens DNA for Helicase to unzip

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Helicase

Unwinds genes

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Leading strand

Follows moving fork

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Lagging strand

Runs away from replication fork

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Okazaki Fragments

Short pieces of DNA

Lagging strand