8.3 dna replication key concept general description: dna replication copies the genetic information...
DESCRIPTION
8.3 DNA Replication Proteins carry out the process of replication. DNA serves only as a template. Enzymes and other proteins do the actual work of replication. Process 1. Enzymes unzip the double helix. (DNA Helicase) 2. Free-floating nucleotides form hydrogen bonds with the template strand. nucleotide The DNA molecule unzips in both directions.TRANSCRIPT
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8.3 DNA Replication
KEY CONCEPT General Description: DNA replication copies the genetic information of a cell.
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8.3 DNA Replication
Replication copies the genetic information.
• A single strand of DNA serves as a template for a new strand.
• The rules of base pairing directreplication.
• DNA is replicated during theS (synthesis) stage of thecell cycle.
• Each body cell gets acomplete set ofidentical DNA.
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8.3 DNA Replication
Proteins carry out the process of replication. • DNA serves only as a template. • Enzymes and other proteins do the actual work of
replication.• Process
1. Enzymes unzip the double helix. (DNA Helicase)2. Free-floating nucleotides form hydrogen bonds
with the template strand.nucleotide
The DNA molecule unzips in both directions.
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8.3 DNA Replication
3. DNA polymerase enzymes bond the nucleotides together to form the double helix.
- DNA polymerases can find and correct errors.
3. DNA polymerase
4. new strand 2. Nucleotide
1. Sugar Phosphate Backbone
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8.3 DNA Replication
• DNA replication is semi-conservative, meaning one original strand and one new strand.
original strand new strand
Two molecules of DNA
4. Two new molecules of DNA are formed, each with an original strand and a newly formed strand.
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8.3 DNA Replication
There are many origins of replication in eukaryotic chromosomes.
• DNA replication starts at many points in eukaryotic chromosomes.
Replication is fast and accurate.
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8.3 DNA Replication
How does replication conserve genetic information?
• Each parent or original strand of DNA serves as a template, allowing 2 identical strands of DNA to be made. This means the information “stays” the same or is “conserved”.
• https://www.youtube.com/watch?v=zdDkiRw1PdU
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8.3 DNA Replication
• https://www.youtube.com/watch?v=z685FFqmrpo