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15rna (1) - Lecture 15 Transcription Chapter 21 Gene...

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Lecture 15: Transcription Chapter 21: Gene Expression
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The Big Picture DNA is our genetic information, but what does the cell DO with that information?
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What is Gene Expression? DNA sequence (ATGC) divided into genes Average human gene: 27,000 base pairs of DNA Coded instructions on how to make proteins
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Key Players in Gene Expression DNA In order of appearance
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Key Players in Gene Expression DNA mRNA
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Key Players in Gene Expression DNA mRNA rRNA
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Key Players in Gene Expression DNA mRNA rRNA tRNA
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Key Players in Gene Expression DNA mRNA rRNA tRNA Amino Acids
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Key Players in Gene Expression DNA mRNA rRNA tRNA Amino Acids Protein
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Key Players in Gene Expression DNA mRNA rRNA tRNA Amino Acids Protein
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Steps of Gene Expression 1.) Transcription Moving genetic information out of nucleus into cytoplasm of cell 2.) Translation
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Transcription Overview First step in gene expression Transcription: make an exact copy Like DNA replication, but NO double helix
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Transcription Location Happens in the nucleus Where DNA is present Used to form a single strand of mRNA
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mRNA Interacts directly with DNA genetic code Single strand of nucleotides I.e. A, U, G, C
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