1 / 5

DNA replication

DNA replication. Ch. 11.1. Before a cell can divide by mitosis or meiosis it must first make a copy of its chromosomes This process is called DNA replication DNA is composed of 2 strands containing a sequence of nucleotides

cecile
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 Ch. 11.1

  2. Before a cell can divide by mitosis or meiosis it must first make a copy of its chromosomes • This process is called DNA replication • DNA is composed of 2 strands containing a sequence of nucleotides • During replication, each strand serves as a pattern to make a new DNA molecule

  3. Begins as an enzyme breaks the hydrogen bonds between nitrogen bases that hold the 2 strands together, thus unzipping the DNA molecule • As DNA unzips, nucleotides that are floating free in the surrounding area bond to the single strands by base pairing. • Another enzyme bonds these new nucleotides into a chain

  4. Process continues until the entire molecule has been unzipped and replicated • Each new strand formed is a complement of one of the original strands • Result is the formation of 2 DNA molecules identical to the original DNA molecule

  5. Draw, label and describe DNA replication pg. 292-293

More Related