1 / 11

DNA Replication

DNA Replication. VACHS BIOLOGY. Today’s Question : When a mutation occurs in one strand of DNA, can it spread to other strands? . DNA Structure. Review : 1. DNA has a double-helix shape 2. The outside pieces are called a “phosphate backbone.” 3. The inside pieces are called “base pairs.”

wallis
Download Presentation

DNA Replication

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 VACHS BIOLOGY

  2. Today’s Question: When a mutation occurs in one strand of DNA, can it spread to other strands?

  3. DNA Structure Review: 1. DNA has a double-helix shape 2. The outside pieces are called a “phosphate backbone.” 3. The inside pieces are called “base pairs.” WHAT ARE THE FOUR BASE PAIRS?!?!?!

  4. DNA BASE PAIRS ADENINE and THYMINE GUANINEand CYTOSINE

  5. DNA IS CONSTANTLY REPLICATING… BUT HOW?!

  6. STEP 1) DNA “UNZIPS”!

  7. STEP 2) NEW BASE PAIRS ARE ADDED TO EACH ORIGINAL STRAND!

  8. STEP 3) YOU END UP WITH TWO IDENTICAL STRANDS!

  9. 6. THIS IS CALLED “SEMI-CONSERVATIVE” REPLICATION!

  10. LET’S TRY IT: PIPECLEANER DNA!

  11. ASSIGN EACH TABLE GROUP A ROLE: DNA HELICASE (1 person): Responsible for retrieving and unzipping the original strand! DNA POLYMERASE (2 people): Responsible for retrieving new base pairs and creating the complementary (new) strands!

More Related