DNA Structure and Replication

Front

The shape of DNA is referred to as a _____

Back

double helix

Front

DNA replication takes place during the ___ stage of the cell cycle.

Back

Synthesis

Front

The single ring structures are also known as ____

Back

pyrimidines

Front

DNA is a long, double stranded molecule composed of monomers called?

Back

nucleotides

Front

DNA is copied in a semi-conservative manner. This means...

Back

The new DNA has one old and one new strand.

Front

What are the building blocks of DNA?

Back

Nucleotides, which consist of a sugar, a phosphate group, and a nitrogenous base.

Front

What are the two types of nitrogenous bases in DNA?

Back

Purines (adenine and guanine) and pyrimidines (cytosine and thymine).

Front

What is the role of DNA polymerase in DNA replication?

Back

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

Front

What is the function of helicase in DNA replication?

Back

Helicase unwinds the double helix, separating the two strands of DNA.

Front

What is the significance of the 5' and 3' ends of a DNA strand?

Back

DNA strands have directionality; nucleotides are added to the 3' end during replication.