DNA Replication AP Biology

Front

What is the role of helicase in DNA replication?

Back

Helicase is the enzyme that unzips the DNA double helix, separating the two strands to allow for replication.

Front

What is the complementary strand of 5' AGCTAGCTAGCT 3'?

Back

3' TCGATCGATCGA 5'.

Front

During which phase of the cell cycle does DNA replication occur?

Back

DNA replication occurs during the S phase of the cell cycle.

Front

What marks the 5' end of a DNA strand?

Back

The 5' end of DNA is marked by a phosphate group.

Front

Why is DNA replication described as semi-conservative?

Back

DNA replication is semi-conservative because each new DNA molecule consists of one original strand and one newly synthesized strand.

Front

What is the function of DNA polymerase in replication?

Back

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

Front

What are the building blocks of DNA?

Back

The building blocks of DNA are nucleotides, which consist of a phosphate group, a sugar (deoxyribose), and a nitrogenous base.

Front

What are the four nitrogenous bases in DNA?

Back

The four nitrogenous bases in DNA are adenine (A), thymine (T), cytosine (C), and guanine (G).

Front

How do the nitrogenous bases pair in DNA?

Back

Adenine pairs with thymine (A-T) and cytosine pairs with guanine (C-G) through hydrogen bonds.

Front

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

Back

The 3' and 5' ends indicate the directionality of the DNA strand, which is crucial for replication and transcription.