McDougal Littell ClassZone

1.

What does "semiconservative replication" mean?

(A)

Each new double helix contains two new strands.

(B)

Each new double helix contains one original strand and one new strand.

(C)

Each new double helix contains two original strands.

(D)

One new double helix contains two original strands, and the other double helix contains two new strands.

2.

What is the goal of DNA replication?

(A)

to make RNA

(B)

to ensure that every cell has a complete set of identical DNA

(C)

to make proteins

(D)

to complete the cell cycle

3.

What is the function of DNA polymerase?

(A)

to unzip DNA

(B)

to bring new nucleotides to DNA

(C)

to hold the strands apart so they can be copied

(D)

to bond nucleotides together

4.

What feature of replication ensures that DNA is copied quickly?

(A)

Replication occurs in thousands of places at once.

(B)

The DNA molecule is replicated from both ends toward the center.

(C)

DNA replicates during both interphase and mitosis.

(D)

Nucleotides are pre-assembled before replication begins.

5.

How does a cell ensure that no errors are introduced during replication?

(A)

Base-pairing rules do not allow errors to occur.

(B)

The origins of replication correct errors.

(C)

DNA polymerase proofreads and corrects the new DNA.

(D)

DNA ligase proofreads and corrects the new DNA.