DNA Replication and Mutations Review

Front

What is the directionality of DNA?

Back

DNA is said to be anti-parallel, meaning the two strands run in opposite directions.

Front

What role does DNA polymerase play in DNA replication?

Back

DNA polymerase builds the new DNA continuously along the leading strand.

Front

Why is DNA replication necessary?

Back

DNA replication is necessary so that new cells will have a copy of the DNA.

Front

What is the first step in DNA replication?

Back

The first step is when DNA Helicase unwinds the original DNA strand.

Front

What is the complementary nucleotide for Adenine in DNA?

Back

The complementary nucleotide for Adenine is Thymine.

Front

What is the function of RNA Primase in DNA replication?

Back

RNA Primase lays down an RNA primer for new nucleotide bases.

Front

What happens during the lagging strand synthesis?

Back

On the lagging strand, DNA is synthesized in short fragments called Okazaki fragments.

Front

What is the role of DNA Ligase?

Back

DNA Ligase knits together fragments on the lagging strand.

Front

What are the four nucleotide bases in DNA?

Back

The four nucleotide bases in DNA are Adenine, Thymine, Cytosine, and Guanine.

Front

How do mutations occur in DNA?

Back

Mutations can occur due to errors in DNA replication or external factors like radiation.