DNA structure and replication

Front

What type of macromolecule is DNA?

Back

DNA is a nucleic acid.

Front

What does it mean that DNA strands are antiparallel?

Back

Antiparallel means that the two strands of DNA run in opposite directions.

Front

If a template DNA strand has the sequence AAGCT, what would be the sequence of the newly formed strand?

Back

The sequence of the newly formed strand would be TTCGA.

Front

Which of the following is not a DNA base?

Back

Aladine is not a DNA base.

Front

What is the function of ligase in DNA replication?

Back

Ligase seals the gaps in new strands produced during replication.

Front

What are the four bases of DNA?

Back

The four bases of DNA are adenine, thymine, cytosine, and guanine.

Front

What is the role of helicase in DNA replication?

Back

Helicase unwinds the DNA double helix.

Front

What is the semi-conservative model of DNA replication?

Back

In the semi-conservative model, each new DNA molecule consists of one old strand and one new strand.

Front

What is the function of DNA polymerase?

Back

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

Front

What is a nucleotide?

Back

A nucleotide is the basic building block of DNA, consisting of a sugar, a phosphate group, and a nitrogenous base.