4.2 DNA Replication Flashcards
1
Q
helicase
A
unwinds DNA strands
2
Q
primase
A
lays down RNA primers
3
Q
DNA polymerase III
A
matches base pairs of both new strands
4
Q
DNA polymerase I
A
replaces RNA primers with DNA nucleotides
5
Q
ligase
A
binds breaks in DNA molecule
6
Q
direction of replication
A
5’ to 3’
7
Q
leading strand
A
5’ to 3’ towards replication fork
8
Q
lagging strand
A
5’ to 3’ away from replication fork
9
Q
Okazaki fragments
A
fragments of the lagging strand
10
Q
order of enzymes
A
helicase
primase
DNA polymerase III
DNA polymerase I
ligase
11
Q
why is DNA replication a semi-discontinuous process
A
one strand is continuous (leading strand) and the other is discontinuous (lagging strand)
