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DNA Replication Fork (Quiz 2)

View the animation below, then complete the quiz to test your knowledge of the concept.






1DNA is unwound by
A)DNA polymerase III
B)RNA primase
C)DNA polymerase I
D)helicase
E)DNA ligase



2DNA polymerase can add nucleotides to
A)a free 3' OH end of a growing DNA chain
B)a free 5' OH end of a growing DNA chain
C)either a 3' or a 5' end of a DNA chain
D)a 5' end of an RNA primer
E)all of the above



3The leading strand of DNA is synthesized
A)discontinuously in a 5' to 3' direction
B)continuously in a 5' to 3' direction
C)discontinuously in a 3' to 5' direction
D)continuously in a 3' to 5' direction
E)in both directions



4The lagging strand of DNA is synthesized continuously.
A)True
B)False



5DNA ligase forms a bond between the 3'OH of the growing strand and the 5' phosphate in front of it, joining the DNA fragments together.
A)True
B)False







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