DNA Structure and Replication

Front

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

Back

Synthesis

Front

The shape of DNA is referred to as a _____.

Back

double helix

Front

Adenine always pairs with ______.

Back

Thymine

Front

The two strands of DNA are connected to each other by what type of bond?

Back

hydrogen

Front

The double ring bases are also referred to as _____.

Back

purines

Front

What are the four nitrogenous bases in DNA?

Back

Adenine, Thymine, Cytosine, Guanine

Front

What is the function of DNA polymerase in DNA replication?

Back

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

Front

What is the role of helicase in DNA replication?

Back

It unwinds and separates the double-stranded DNA.

Front

What is the difference between purines and pyrimidines?

Back

Purines have a double-ring structure (Adenine and Guanine), while pyrimidines have a single-ring structure (Cytosine and Thymine).

Front

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

Back

They indicate the directionality of the DNA strand, which is important for replication and transcription.