DNA Replication Practice

After topoisomerase stabilizes the strand, which is the next step?

• DNA Helicase unwinds original DNA strand

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

• DNA polymerase builds new strands by bring in new nucleotide bases.

• Ligase knits together fragments on lagging strand

What are Okazaki fragments?

• a. Fragments of RNA that comprise the leading strand

• b. Short fragments of DNA that comprise the leading strand

• c. Fragments of RNA that comprise the lagging strand

• d. Short fragments of DNA that comprise the lagging strand

Give the complimentary strand:

• ACT GGC TAC AAT CAG

• TAA CCG ATG TTA GTC

• TGA CCG ATT TTA GTC

• TGA CCG ATG TTA GTC

How is the lagging strand synthesized?

• Continuously

• Discontinuously

• Semi-continuously

• Not synthesized

Answer explanation

The lagging strand is synthesized discontinuously through the formation of Okazaki fragments, which are later joined together by DNA ligase.

What bond holds the two DNA strands together?

• Hydrogen

• Nitrogen

The enzyme that unwinds and unzips the DNA to prepare for replication is:

• helicase

• replicase

• polymerase

• synthase

Which enzyme is responsible for adding nucleotides ("The Builder")?

• Topoisomerase

• DNA Polymerase

• Ligase

• Primase

Before cells can divide, what must be copied?

• mitochondria

• cytoplasm

• DNA

• Cell Wall

Tags

NGSS.HS-LS1-4

Which of the following is a base pair?

• Adenine - Cytosine

• Cytosine - Thymine

• Deoxyribose - Cytosine

• Cytosine - Guanine

Tags

NGSS.HS-LS3-1

Which sequence of DNA bases would pair with this template strand
ATG TGA CAG

• ATG TGA CAG

• TAC ACT GTC

• GTA AGT GAC

• CAT TCA CTG