DNA Replication Fork

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

1		The enzyme that unwinds a segment of the DNA molecule is...
			A)	DNA polymerase.
			B)	DNA ligase.
			C)	RNA primase.
			D)	DNA polymerase III.
			E)	helicase.
2		The enzyme that travels along the leading strand assembling new nucleotides on a growing new strand of DNA is...
			A)	DNA polymerase.
			B)	DNA ligase.
			C)	RNA primase.
			D)	DNA polymerase III.
			E)	helicase.
3		Before the lagging strand can begin assembling new DNA nucleotides, which of the following must occur?
			A)	DNA polymerase III adds deoxyribonucleotides.
			B)	DNA polymerase I removes some material and replaces it with DNA.
			C)	OH bonds must be broken between the two strands of DNA.
			D)	DNA ligase forms a phosphodiester bond between the 3' OH of the growing strand and the 5' phosphate in front of it.
			E)	RNA primase constructs a short RNA primer.
4		During DNA replication, the lagging strand is synthesized continuously, while the leading strand is synthesized discontinuously.
			A)	True
			B)	False
5		Before DNA replication can occur, the OH bonds between the strands must be broken.
			A)	True
			B)	False