DNA Replication

DNA Replication

​

Replication is the process DNA uses for making a copy of itself.

The reason DNA must be copied is to make new cells for

• Growth

• Cell repair

• Reproduction

Trillions of new cells are needed for a human to grow to adulthood.

Each new cell requires new DNA.

Video Segments

There are three video segments. To play each one, click on the video to start.

Replication happens in interphase.

​

Cells spend the majority of their time in interphase.

​

​

​

​

​Interphase

Multiple Choice

The purpose of replication is to

• eliminate DNA

• make more DNA

• change the DNA

Multiple Choice

Where does replication happen in human cells?

• the cell membrane

• the ribosome

• the nucleus

Multiple Choice

When does replication happen?

• mitosis

• cell division

• interphase

Multiple Choice

The purpose of enzymes is to

• slow down reactions

• speed up reactions

Multiple Choice

The enzyme that unzips DNA by breaking hydrogen bonds is

• ligase

• helicase

• DNA polymerase

• primase

Multiple Choice

DNA polymerase is called "the builder" because it

• digs a foundation

• makes new strands of DNA

• breaks hydrogen bonds

Multiple Select

Which of the following are the correct pairings of DNA nucleotides?

• A-T

• A-C

• C-T

• C-G

Multiple Choice

The bonds that join the DNA nucleotides and that can easily be broken for replication are

• nitrogen bonds

• hydrogen bonds

• oxygen bonds

Multiple Choice

Replication is called semi-conservative because

• Each new molecule contains part of the original DNA

• sometimes it conserves fuel

• DNA conserves ecosystems

Multiple Choice

The result of replication is two DNA molecules

• True

• False