DNA Structure and Replication Review

DNA Replication

How copies are made!

Fill in the Blank

DNA is found in the _____________ of all cells.

Fill in the Blank

In order to make more cells (which you are constantly doing), you must make a _________ of DNA first!

Fill in the Blank

The first step required in order for DNA to make a copy of itself is to ______________ those hydrogen bonds between the bases.

Multiple Choice

An enzyme called ___________ breaks the hydrogen bonds and unzips the original parent DNA molecule.

• DNA helicase

• DNA Polymerase

• Replication Forks

• replication Bubbles

Multiple Choice

After the DNA is unzipped, _____________ reads the DNA and determines which NEW nucleotides to add to the parent strand.

• DNA helicase

• DNA Polymerase

• Replication Forks

• replication Bubbles

Multiple Choice

DNA is unzipped and read at many different sites on the DNA molecule to speed up the replication process. These sites are called ______.

• DNA helicase

• DNA Polymerase

• Replication Forks

• Replication Bubbles

Multiple Choice

Since DNA is a 3-Dimensional molecule made of linked nucleotides, it really doesn’t have a “left” or “right”; “up” or “down”.

• True

• False

Fill in the Blank

DNA molecules are __________________- meaning the two strands run parallel to one another, but in different directions.

(It always looks like one strand is up-side down relative to the other).

Multiple Choice

A new DNA strand that moves continuously TOWARD the replication fork is known as the ___________.

• leading strand

• lagging strand

Multiple Choice

Because the strands are anti-parallel, the ____________ will move AWAY from the replication fork.

• leading strand

• lagging strand

Fill in the Blank

Okazaki fragments are the short segments of new ______ on the lagging strand.

Fill in the Blank

The final product of DNA replication is ____ molecules of DNA (4 strands total since each molecule is double stranded).

Fill in the Blank

Each new DNA molecule consists of one (old) parental strand, and one (___) daughter strand.