1 29 Dna Replication
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Transcript of 1 29 Dna Replication
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B1- 95%B2- 93%B3- 98%B5- 99%
You guys rocked it!!!!
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No School, MondayNo quiz TuesdayQuiz Wednesday
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DNA is super compacted, forming chromosomes
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Made of 3 billion base pairs
23,000 of these code for proteins We call these “genes”
The rest of the genome is “junk DNA”
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http://www.youtube.com/watch?v=N5zFOScowqo
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Genes produce proteins
The order of nitrogen bases in DNA molecules regulate what types of proteins are produced.
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DNA Replication is when DNA makes a copy of itself.
When DNA replicates it produces two DNA molecules that are identical (exactly the same) as the original parent strand:
Picture of DNA Replication:
1 DNA 2 DNA
DNA Replication
DNA Replication
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Happens in the nucleus
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http://www.youtube.com/watch?v=AGUuX4PGlCc&feature=related
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Step 1: Hydrogen bonds break and DNA strands begin to unzip.
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Step 2: Free floating nucleotides join the open DNA to form 2 new DNA molecules.
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Step 3: There are 2 new molecules of DNA which are exact copies of each other. Each DNA molecule has one old strand and one new strand.
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-Cells need DNA to make proteins they need to survive.
-DNA Replication allows a cell to pass down its genetic information to the next generation.