DNA Replication

The enzyme that unzips the DNA to prepare for replication

• helicase

• replicase

• polymerase

• synthase

DNA replication results in two DNA molecules,

• each one with two original strands

• each one with two new strands

• each one with one new strand and one original strand

• one with two new strands and the other with two original strands

The bonds that hold the two strands of DNA together come from...

• the attraction of phosphate groups 

• strong bonds between  bases and sugars

• carbon to carbon bonds in the sugar

• weak hydrogen bonds between the bases

Which component of DNA specifies the traits of an organism?

• 5-carbon sugar (deoxyribose)

• hydrogen bonds

• phosphate groups

• nitrogenous base pairs

Tags

NGSS.HS-LS3-1

After analyzing a sample of DNA, a scientist recorded the data shown in the table. What percentage of the DNA sample is cytosine?

• 22%

• 25%

• 28%

• 56%

This picture is illustrating the ____ nature of DNA.

• anti-parallel

• deoxyribosic

• helical

• radioactive

If a strand reads:
3' A A A T T T C 5'
The matching strand would read...

• 5' T T T A A A G 3'

• 3' T T T A A A G 5'

• 5' A A A T T T C 3'

• 3' U U U A A A G 5'

DNA Polymerase III is able to replicate the new DNA ______ along the leading strand.

• continuously

• only in short fragments

• very slowly

• prokaryotically

Sometimes, DNA is called "semi-conservative." Why might this be?

• The old strand is "conserved" and used to make the new strands

• Uracil is "conserved" in that it is only used to make the new strands

• ATP is "conserved" via the usage of facilitated diffusion

• Ligase is "conserved" in that it is denatured by the process

Tags

NGSS.HS-LS3-2

In what phase of the cell cycle does DNA replication take place?

• G1

• S

• G2

• M