DNA Replication

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DNA Replication
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DNA Replication

• Replication DNA copies itself exactly
• (Occurs within the nucleus)
• http//www.youtube.com/watch?vzdDkiRw1PdU

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A. Facts of DNA Replication

• 1. Complementary base pairing rule
• C - G
• A - T

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A. Basic Facts of DNA Replication

• 2. One side of DNA molecule is
• a
• template
• for
• making
• the
• other side (strand)

?s 1-3
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B. Process of DNA Replication

• Uncoil unzip DNA molecule
• Enzyme Helicase breaks
• Weak Hydrogen Bonds

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B. Process of DNA Replication

• 2. Enzyme Polymerase adds complementary N-bases

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Replication Moovie
C - G A - T
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C. Semi-conservative replication

• Each new DNA molecule
• contains
• one old strand
• one new strand

?s 4-6
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(No Transcript)
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Lets Practice!

• -Original Strand ACT GTT ACG GAC
• Complementary Strand
• -Original Strand TTT CAT TAC TTT
• Complementary Strand
• -Original Strand ACT GTT ACG GAC
• Complementary Strand

TGA CAA TGC CTG
AAA GTA ATG AAA
TGA CAA TGC CTG
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DNA vs. RNA
DNA RNA
Sugar deoxyribose Sugar ribose
Double-stranded molecule Single-stranded molecule
Thymine bonds with adenine Uracil instead of thymine
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DNA vs. RNA
DNA RNA
Nuclear DNA Mitochondrial DNA Chloroplast DNA mRNA messenger tRNA transfer rRNA ribosomal
Nuclear DNA never leaves the nucleus Assembled in nucleus, moves to cytoplasm (leaves the nucleus)
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• DNA vs. RNA

?s 7-12