Molecular Biology Terminology

The opposite arrangement of the sugar-phosphate backbones in a DNA double helix.

• antiparallel
• double helix
• origin of replication
• semiconservative

A Y-shaped region on a replicating DNA molecule where new strands are growing.

• Antiparallel
• helicase
• replication fork
• topoisomerase

Proteins that bind to and stabilize he single strands of DNA exposed when helicase unwinds the double helix in preparation for replication.

• helicase
• primer
• single strand binding proteins
• topoisomerase

Enzyme involved in DNA replication that joins individual nucleotides to produce a DNA molecule

• DNA polymerase
• Helicase
• Topoisomerase
• Wakase

A discontinuously synthesized DNA strand that elongates in a direction away from the replication fork.

• Lagging Strand
• Leading Strand
• Okazaki fragments

an enzyme that eventually joins the sugar-phosphate backbones of the Okazaki fragments

• DNA Polymerase
• DNA Ligase
• Primase
• Topoisomerase

the new continuous complementary DNA strand synthesized along the template strand in the mandatory 5' --> 3' direction.

• Lagging Strand
• Leading Strand
• Okazaki fragments

Short fragments of DNA that are a result of the synthesis of the lagging strand during DNA replication..

• Lagging Strand
• Leading Strand
• Okazaki fragments

What enzyme adds nucleotides to build the new strand of DNA?

• Helicase
• DNA polymerase
• Ligase
• Primase

When the DNA is replicated, which strand of DNA is synthesized in Okazaki fragments?

• The leading strand
• The lagging strand
• The parent strand
• The RNA strand