DNA Structure & Replication 22.23

Front

Why does DNA replicate?

Back

It needs to make a copy before the cell divides so each cell has the complete DNA.

Front

Which of the following best describes a DNA molecule?

Back

Double helix.

Front

At the end of replication, how many DNA molecules are there?

Back

2.

Front

Name this structure: nucleotide, double helix, twisted ladder, hydrogen bond.

Back

Nucleotide.

Front

The base guanine pairs with what other base?

Back

Cytosine.

Front

What is the basic unit of DNA?

Back

Nucleotide.

Front

What are the four nitrogenous bases in DNA?

Back

Adenine, Thymine, Cytosine, Guanine.

Front

What type of bond holds the two strands of DNA together?

Back

Hydrogen bonds.

Front

What is the process of copying DNA called?

Back

DNA replication.

Front

What enzyme is responsible for unwinding the DNA double helix during replication?

Back

Helicase.