Amoeba Sisters Video Recap: DNA Replication // ANSWER KEY

Phosphate

Depicted as a green circle on DNA diagram

Hydrogen bond. Total number in image?

3

Deoxyribose (sugar). Total number in image?

6

Nitrogenous base. Total number in image?

6

Ligase:

Enzyme that binds or "glues" fragments of DNA together

DNA Polymerase:

Enzyme that builds a new DNA molecule by adding complementary strands of DNA to the original, unzipped DNA molecule

Primase:

Enzyme that synthesizes a primer so DNA polymerase knows where to begin working

3. Helicase:

Enzyme that unzips the the double stranded DNA by breaking the hydrogen bonds holding the bases together

8. Explain what is meant by the "lagging" strand and why this occurs.

It replicates at a slower pace because it is being replicated in the opposite direction of the replication fork.

Why does DNA need to replicate before cells divide?

So that each cell has a full copy of DNA