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Published byCalvin Collins Modified over 6 years ago
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12.2 DNA Replication Process of creating an identical copy of DNA is replication. 2 strands will unwind and become a template for copying. strands separate at replication fork. strands are separated by DNA helicase (enzyme)
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12.2 DNA Replication
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12.2 DNA Replication Each strand becomes a template to make a copy.
Bases are paired by DNA polymerase. DNA polymerase adds bases to make a new strand.
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12.2 DNA Replication
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12.2 DNA Replication DNA => DNA = Replication = making a copy (identical to original) DNA => RNA = Transcription = rewriting
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12.2 DNA Replication RNA – Ribo Nucleic acid
Made of a long chain of repeating nucleotides. Differences from DNA RIBOSE nucleic acid Shorter ( 1 or several genes) Short lived Single strand Adenine (A), Guanine (G), Cytosine (C), and Uracil (U) Uracil is substituted for Thymine <= in DNA
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12.2 DNA Replication The RNA has an Oxygen on the bottom carbon .
The DNA is missing an Oxygen on the bottom carbon. This one change makes DNA more stable than RNA
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12.2 DNA Replication Types of RNA mRNA Messenger RNA
Carries genetic information from DNA to ribosomes
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12.2 DNA Replication TRNA - transfer RNA
Carries amino acids to ribosomes (review Ch. 6 for amino acids) Peptide chain is made of amino acids
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12.2 DNA Replication RRNA - Ribosomal RNA
Protein and rRNA make ribosomes rRNA is a component of a ribosome
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12.2 DNA Replication Process of Transcription
A process where 1 or several genes are coded into mRNA from DNA RNA polymerase binds and opens DNA The template strand of DNA contains the gene you need. RNA polymerase will add compliment bases to make mRNA
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12.2 DNA Replication DNA => DNA = Replication
mRNA goes to the ribosome for protein synthesis (Review Ch. 7) DNA => DNA = Replication DNA => RNA = Transcription RNA => Protein = Translation
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