University:
California State University, Northridge
Course:
BIOL 322 | Evolutionary Biology
Academic year:

2024
Views:

255

Pages:

1
Author:

helyettitycx1

Amoeba Sisters Video Recap: DNA Replication // ANSWER KEY Why does DNA need to replicate before cells divide? So that each cell has a full copy of DNA Deoxyribose (sugar). Total number in image? 6 Nitrogenous base. Total number in image? 6 Hydrogen bond. Total number in image? 3 Phosphate Depicted as a green circle on DNA diagram Enzyme that unzips the the double stranded DNA by breaking the hydrogen bonds holding the bases together 3. Helicase: Enzyme that builds a new DNA molecule by adding complementary strands of DNA to the original, unzipped DNA molecule DNA Polymerase: Enzyme that synthesizes a primer so DNA polymerase knows where to begin working Primase: Enzyme that binds or "glues" fragments of DNA together Ligase: 4. Helicase unwinds or unzips DNA strands 5. Primase tells the polymerase where to start 6. Polymerase builds new DNA using original DNA strand 7. Ligase - binds or "glues" fragments of new DNA to old DNA 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. 1/1