DNA Structure

Front

What is DNA?

Back

DNA (Deoxyribonucleic Acid) is the molecule that carries the genetic instructions for life. It is composed of two strands that coil around each other to form a double helix.

Front

What are the building blocks of DNA?

Back

The building blocks of DNA are nucleotides, which consist of a sugar, a phosphate group, 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

In DNA, Adenine pairs with Thymine (A-T) and Cytosine pairs with Guanine (C-G).

Front

What is the role of DNA helicase?

Back

DNA helicase is the enzyme that unwinds and separates the two strands of DNA during replication.

Front

What is the function of DNA ligase?

Back

DNA ligase is the enzyme that joins Okazaki fragments together on the lagging strand during DNA replication.

Front

What is the role of RNA primer in DNA replication?

Back

The RNA primer provides a starting point for DNA polymerase to begin synthesizing the new DNA strand.

Front

What is the function of DNA polymerase?

Back

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

Front

Where does DNA replication occur in eukaryotic cells?

Back

DNA replication occurs in the nucleus of eukaryotic cells.

Front

What is the sugar component of DNA?

Back

The sugar component of DNA is deoxyribose.