Nature of DNA

The enzyme that unwinds the DNA to prepare for replication

• helicase

• primase

• polymerase

• ligase

DNA replication results in two DNA molecules,

• each one with two original strands
• each one with two new strands
• each one with one new strand and one original strand
• one with two new strands and the other with two original strands

Which enzyme is responsible for adding nucleotides?

• Topoisomerase

• DNA Polymerase

• Ligase

• Helicase

The process of DNA replication is called semi conservative because it results in

• none of these
• Two DNA molecules.  One original molecule and one with two new strands
• two exact copies with new strands
• two identical molecules, each with 1 original strand and one new.

Which enzyme fixes the Okazaki fragments in the lagging strand?

• Helicase

• Polymerase

• Ligase

• Primase

If a strand reads:
3' A A A T T T C 5'
The matching strand would read...

• 5' T T T A A A G 3'
• 3' T T T A A A G 5'
• 5' A A A T T T C 3'
• 3' U U U A A A G 5'

What are the sections of newly synthesized DNA on the lagging strand called?

• Okazaki fragments

• Polymer gaps

• Helicase fragments

• Acidic gaps

This picture is illustrating the ____ nature of DNA.

• anti-parallel

• parallel

• helical

• radioactive

Tags

NGSS.HS-LS1-1

Polymerase is able to replicate the new DNA ______ along the leading strand.

• continuously

• only in short fragments

• very slowly

• prokaryotically

Which enzyme lays down short segments of RNA as a starting place for DNA Polymerase

• polymerase

• ligase

• primase

• helicase