dna replicationdna replication •in order to copy the dna double helix, the dna needs to unravel...
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![Page 1: DNA ReplicationDNA Replication •In order to copy the DNA double helix, the DNA needs to unravel and expose the nucleotides. •DNA Helicase is a protein that comes in, unlocks the](https://reader031.vdocuments.net/reader031/viewer/2022013003/5f0c46ef7e708231d4349a61/html5/thumbnails/1.jpg)
DNA Replication
![Page 2: DNA ReplicationDNA Replication •In order to copy the DNA double helix, the DNA needs to unravel and expose the nucleotides. •DNA Helicase is a protein that comes in, unlocks the](https://reader031.vdocuments.net/reader031/viewer/2022013003/5f0c46ef7e708231d4349a61/html5/thumbnails/2.jpg)
DNA Replication
• In order to copy the DNA double helix, the DNA needs to unravel and expose the nucleotides.
• DNA Helicase is a protein that comes in, unlocks the base pairs and separates the strands.
![Page 3: DNA ReplicationDNA Replication •In order to copy the DNA double helix, the DNA needs to unravel and expose the nucleotides. •DNA Helicase is a protein that comes in, unlocks the](https://reader031.vdocuments.net/reader031/viewer/2022013003/5f0c46ef7e708231d4349a61/html5/thumbnails/3.jpg)
DNA Polymerase
• Once the strands are separated, another protein called DNA polymerase attaches to the strands and begins attaching matching base pairs.
New base pairs being added
New base pairs being added
![Page 4: DNA ReplicationDNA Replication •In order to copy the DNA double helix, the DNA needs to unravel and expose the nucleotides. •DNA Helicase is a protein that comes in, unlocks the](https://reader031.vdocuments.net/reader031/viewer/2022013003/5f0c46ef7e708231d4349a61/html5/thumbnails/4.jpg)
DNA Replication
DNA Helicase
DNA PolymeraseDNA Polymerase
![Page 5: DNA ReplicationDNA Replication •In order to copy the DNA double helix, the DNA needs to unravel and expose the nucleotides. •DNA Helicase is a protein that comes in, unlocks the](https://reader031.vdocuments.net/reader031/viewer/2022013003/5f0c46ef7e708231d4349a61/html5/thumbnails/5.jpg)
Overview
![Page 6: DNA ReplicationDNA Replication •In order to copy the DNA double helix, the DNA needs to unravel and expose the nucleotides. •DNA Helicase is a protein that comes in, unlocks the](https://reader031.vdocuments.net/reader031/viewer/2022013003/5f0c46ef7e708231d4349a61/html5/thumbnails/6.jpg)
DNA Replication
![Page 7: DNA ReplicationDNA Replication •In order to copy the DNA double helix, the DNA needs to unravel and expose the nucleotides. •DNA Helicase is a protein that comes in, unlocks the](https://reader031.vdocuments.net/reader031/viewer/2022013003/5f0c46ef7e708231d4349a61/html5/thumbnails/7.jpg)
Binary Fission
• Prokaryotes (bacteria) reproduce by binary fission.
![Page 8: DNA ReplicationDNA Replication •In order to copy the DNA double helix, the DNA needs to unravel and expose the nucleotides. •DNA Helicase is a protein that comes in, unlocks the](https://reader031.vdocuments.net/reader031/viewer/2022013003/5f0c46ef7e708231d4349a61/html5/thumbnails/8.jpg)
Bacteria• Step 1- replicate the single chromosome.
• Step 2- replicate the DNA plasmids
• Step 3- separate the two sister chromatids and the plasmids.
• Step 4- Begin pinching off the cell
• Step 5- Separate into two new bacteria
![Page 9: DNA ReplicationDNA Replication •In order to copy the DNA double helix, the DNA needs to unravel and expose the nucleotides. •DNA Helicase is a protein that comes in, unlocks the](https://reader031.vdocuments.net/reader031/viewer/2022013003/5f0c46ef7e708231d4349a61/html5/thumbnails/9.jpg)
Chromosomes• A single long piece of DNA – wrapped up
and bound into a tight formation.
• Contains between 50-250 million base pairs
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Humans have 23 pairs of Chromosomes (46 total)
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Sister Chromatids- Duplicated identical pieces of DNA
After duplication, the two identical strands are now called Chromatids
Sister chromatids are held together by the
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Human Chromosomes After Duplication
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It takes _____ minutes to duplicate the DNA of one cell