DNA Structure & Replication 22.23

Front

What does DNA stand for?

Back

Deoxyribonucleic acid.

Front

What is the structure of a DNA molecule?

Back

A double helix.

Front

Why does DNA replicate?

Back

To make a copy before the cell divides so each cell has the complete DNA.

Front

What are nucleotides made up of?

Back

A sugar, phosphate, and a nitrogenous base.

Front

What two molecules form the backbone of a DNA molecule?

Back

Deoxyribose sugar and phosphate.

Front

What are the four nitrogenous bases in DNA?

Back

Adenine, Thymine, Cytosine, and Guanine.

Front

What base pairs with Adenine in DNA?

Back

Thymine.

Front

What is the role of DNA polymerase in DNA replication?

Back

It synthesizes new DNA strands by adding nucleotides complementary to the template strand.

Front

What is the significance of the antiparallel structure of DNA?

Back

It allows the base pairs to align properly for hydrogen bonding.

Front

What is the function of the phosphate group in a nucleotide?

Back

It links nucleotides together to form the DNA backbone.