1 / 18

Understanding DNA Replication: The Key Steps Unveiled

Uncover the mystery of DNA replication - from unwinding to proofreading, learn why and how cells replicate DNA for accurate genetic transmission. Dive into the detailed process step-by-step.

mhuang
Download Presentation

Understanding DNA Replication: The Key Steps Unveiled

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. DNA Replication

  2. Why does DNA replicate? Cells copy genetic information before cell division so that each new cell has a complete set of DNA DNA replication occurs in the nucleus…WHY??

  3. DNA Template

  4. How does DNA replicate 1) UNWIND: Topoisomerase unwinds the coiled strands of DNA

  5. 2) UNZIP: DNA Helicase“unzips” the strands of DNA breaking the hydrogen bonds

  6. 3) HOLD OPEN: Single-Strand Binding proteins (SSBs) keep strands separated

  7. 4) BASE PAIRING:DNA polymerase III bonds free floating nucleotides with nucleotides from the parent strand

  8. 6) PROOFREAD: DNA Polymerase I proofreads new strand and backtracks to correct errors

  9. 5) JOINING NUCLEOTIDES: DNA ligase bonds those nucleotides together.

  10. The result is 2 identical DNA molecules.

  11. Each w/1 new strand & 1 old strand • Called Semi-conservative replication

  12. (Continuous Replication) (Continuous Replication) (Place where replication begins) (Replication starts & stops)

  13. DNA Replication Animation

  14. Talk to a Partner

More Related